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<?php

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/**

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* Youtube shortcode

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* Contains shortcode + some improvements over the Core Embeds syntax (see http://codex.wordpress.org/Embeds )

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* Examples:

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* [youtube https://www.youtube.com/watch?v=WVbQ-oro7FQ]

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* [youtube=http://www.youtube.com/watch?v=wq0rXGLs0YM&fs=1&hl=bg_BG&autohide=1&rel=0]

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* http://www.youtube.com/watch?v=H2Ncxw1xfck&w=320&h=240&fmt=1&rel=0&showsearch=1&hd=0

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* http://www.youtube.com/v/9FhMMmqzbD8?fs=1&hl=en_US

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* https://www.youtube.com/playlist?list=PLP7HaNDU4Cifov7C2fQM8Ij6Ew_uPHEXW

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* @package automattic/jetpack

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if ( ! defined( 'ABSPATH' ) ) {

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exit( 0 );

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}

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/**

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* Replaces YouTube embeds with YouTube shortcodes.

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* Covers the following formats:

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* 2008-07-15:

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* <object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/bZBHZT3a-FA&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><embed src="http://www.youtube.com/v/bZBHZT3a-FA&hl=en&fs=1" type="application/x-shockwave-flash" allowfullscreen="true" width="425" height="344"></embed></object>

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* around 2008-06-06 youtube changed their old embed code to this:

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* <object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/M1D30gS7Z8U&hl=en"></param><embed src="http://www.youtube.com/v/M1D30gS7Z8U&hl=en" type="application/x-shockwave-flash" width="425" height="344"></embed></object>

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* old style was:

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* <object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/dGY28Qbj76A&rel=0"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/dGY28Qbj76A&rel=0" type="application/x-shockwave-flash" wmode="transparent" width="425" height="344"></embed></object>

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* 12-2010:

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* <object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/3H8bnKdf654?fs=1&hl=en_GB"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/3H8bnKdf654?fs=1&hl=en_GB" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object>

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* 01-2011:

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* <iframe title="YouTube video player" class="youtube-player" width="640" height="390" src="http://www.youtube.com/embed/Qq9El3ki0_g" frameborder="0" allowFullScreen></iframe>

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* <iframe class="youtube-player" width="640" height="385" src="http://www.youtube.com/embed/VIDEO_ID" frameborder="0"></iframe>

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* @param string $content HTML content.

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* @return string The content with YouTube embeds replaced with YouTube shortcodes.

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function jetpack_youtube_embed_to_short_code( $content ) {

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if ( ! is_string( $content ) || ! str_contains( $content, 'youtube.com' ) ) {

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return $content;

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}

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// older codes.

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$regexp = '!<object(.*?)>.*?<param\s+name=[\'"]movie[\'"]\s+value=[\'"](https?:)?//www\.youtube\.com/v/([^\'"]+)[\'"].*?>.*?</object>!i';

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$regexp_ent = htmlspecialchars( $regexp, ENT_NOQUOTES );

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$old_regexp = '!<embed(?:\s+\w+="[^"]*")*\s+src="https?(?:\:|&#0*58;)//www\.youtube\.com/v/([^"]+)"(?:\s+\w+="[^"]*")*\s*(?:/>|>\s*</embed>)!';

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$old_regexp_ent = str_replace( '&#0*58;', '&#0*58;|&#0*58;', htmlspecialchars( $old_regexp, ENT_NOQUOTES ) );

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// new code.

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$ifr_regexp = '!<iframe((?:\s+\w+="[^"]*")*?)\s+src="(https?:)?//(?:www\.)*youtube.com/embed/([^"]+)".*?</iframe>!i';

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$ifr_regexp_ent = str_replace( '&#0*58;', '&#0*58;|&#0*58;', htmlspecialchars( $ifr_regexp, ENT_NOQUOTES ) );

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foreach ( compact( 'regexp', 'regexp_ent', 'old_regexp', 'old_regexp_ent', 'ifr_regexp', 'ifr_regexp_ent' ) as $reg => $regexp ) {

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if ( ! preg_match_all( $regexp, $content, $matches, PREG_SET_ORDER ) ) {

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continue;

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}

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foreach ( $matches as $match ) {

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* Hack, but '?' should only ever appear once, and

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* it should be for the 1st field-value pair in query string,

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* if it is present

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* YouTube changed their embed code.

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* Example of how it is now:

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* <object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/aP9AaD4tgBY?fs=1&hl=en_US"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/aP9AaD4tgBY?fs=1&hl=en_US" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object>

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* As shown at the start of function, previous YouTube didn't '?'

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* the 1st field-value pair.

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if ( in_array( $reg, array( 'ifr_regexp', 'ifr_regexp_ent', 'regexp', 'regexp_ent' ), true ) ) {

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$params = $match[1];

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if ( in_array( $reg, array( 'ifr_regexp_ent', 'regexp_ent' ), true ) ) {

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$params = html_entity_decode( $params, ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401 );

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}

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$params = wp_kses_hair( $params, array( 'http' ) );

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$width = isset( $params['width'] ) ? (int) $params['width']['value'] : 0;

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$height = isset( $params['height'] ) ? (int) $params['height']['value'] : 0;

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$wh = '';

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if ( $width && $height ) {

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$wh = "&w=$width&h=$height";

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}

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$url = esc_url_raw( "https://www.youtube.com/watch?v={$match[3]}{$wh}" );

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} else {

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$match[1] = str_replace( '?', '&', $match[1] );

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$url = esc_url_raw( 'https://www.youtube.com/watch?v=' . html_entity_decode( $match[1], ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401 ) );

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}

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$content = str_replace( $match[0], "[youtube $url]", $content );

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/**

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* Fires before the YouTube embed is transformed into a shortcode.

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* @module shortcodes

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* @since 1.2.0

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* @param string youtube Shortcode name.

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* @param string $url YouTube video URL.

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do_action( 'jetpack_embed_to_shortcode', 'youtube', $url );

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}

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}

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return $content;

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}

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if ( jetpack_shortcodes_should_hook_pre_kses() ) {

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add_filter( 'pre_kses', 'jetpack_youtube_embed_to_short_code' );

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}

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/**

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* Replaces plain-text links to YouTube videos with YouTube embeds.

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* @param string $content HTML content.

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* @return string The content with embeds instead of URLs

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function jetpack_youtube_link( $content ) {

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}

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/**

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* Callback function for the regex that replaces YouTube URLs with

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* YouTube embeds.

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* @param array $matches An array containing a YouTube URL.

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function jetpack_youtube_link_callback( $matches ) {

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return "\n" . jetpack_youtube_id( $matches[0] ) . "\n";

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}

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/**

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* Normalizes a YouTube URL to include a v= parameter and a query string free of encoded ampersands.

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* @param string|array $url Youtube URL.

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* @return string|false The normalized URL or false if input is invalid.

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if ( ! function_exists( 'jetpack_youtube_sanitize_url' ) ) :

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/**

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* Clean up Youtube URL to match a single format.

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* @param string|array $url Youtube URL.

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function jetpack_youtube_sanitize_url( $url ) {

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if ( is_array( $url ) && isset( $url['url'] ) ) {

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$url = $url['url'];

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}

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if ( ! is_string( $url ) ) {

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return false;

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}

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$url = trim( $url, ' "' );

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$url = trim( $url );

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$url = str_replace( array( 'youtu.be/', '/v/', '#!v=', '&', '&', 'playlist' ), array( 'youtu.be/?v=', '/?v=', '?v=', '&', '&', 'videoseries' ), $url );

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// Replace any extra question marks with ampersands - the result of a URL like "https://www.youtube.com/v/dQw4w9WgXcQ?fs=1&hl=en_US" being passed in.

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$query_string_start = strpos( $url, '?' );

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if ( false !== $query_string_start ) {

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$url = substr( $url, 0, $query_string_start + 1 ) . str_replace( '?', '&', substr( $url, $query_string_start + 1 ) );

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}

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return $url;

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}

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endif;

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/**

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* Converts a YouTube URL into an embedded YouTube video.

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* URL can be:

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* http://www.youtube.com/embed/videoseries?list=PL94269DA08231042B&hl=en_US

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* http://www.youtube.com/watch#!v=H2Ncxw1xfck

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* http://www.youtube.com/watch?v=H2Ncxw1xfck

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* http://www.youtube.com/watch?v=H2Ncxw1xfck&w=320&h=240&fmt=1&rel=0&showsearch=1&hd=0

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* http://www.youtube.com/v/jF-kELmmvgA

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* http://www.youtube.com/v/9FhMMmqzbD8?fs=1&hl=en_US

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* http://youtu.be/Rrohlqeir5E

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* https://www.youtube.com/watch?v=GJNxoe-iSb4&list=PLAVZ4NFtZX0fE54mDSqNKym-o_rz-8xmk

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* @param string $url Youtube URL.

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function jetpack_youtube_id( $url ) {

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$id = jetpack_get_youtube_id( $url );

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if ( ! $id ) {

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return sprintf( '', esc_html__( 'YouTube Error: bad URL entered', 'jetpack' ) );

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}

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$url = jetpack_youtube_sanitize_url( $url );

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$url = wp_parse_url( $url );

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$thumbnail = "https://i.ytimg.com/vi/$id/hqdefault.jpg";

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$video_url = add_query_arg( 'v', $id, 'https://www.youtube.com/watch' );

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$args = jetpack_shortcode_youtube_args( $url );

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if ( empty( $args ) ) {

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return sprintf( '', esc_html__( 'YouTube Error: empty URL args', 'jetpack' ) );

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}

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// Account for URL having both v and list, where jetpack_get_youtube_id() only accounts for one or the other.

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if ( isset( $args['list'] ) && $args['list'] === $id ) {

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$id = null;

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}

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if ( isset( $args['v'] ) ) {

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$id = $args['v'];

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}

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if ( ! $id && empty( $args['list'] ) ) {

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return sprintf( '', esc_html__( 'YouTube Error: missing id and/or list', 'jetpack' ) );

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}

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list( $w, $h ) = jetpack_shortcode_youtube_dimensions( $args );

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$params = array(

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'rel' => ( isset( $args['rel'] ) && '0' === $args['rel'] ) ? 0 : 1,

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'showsearch' => ( isset( $args['showsearch'] ) && '1' === $args['showsearch'] ) ? 1 : 0, // Now deprecated. See https://developers.google.com/youtube/player_parameters#march-29,-2012.

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'showinfo' => ( isset( $args['showinfo'] ) && '0' === $args['showinfo'] ) ? 0 : 1, // Now obsolete. See https://developers.google.com/youtube/player_parameters#showinfo.

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'iv_load_policy' => ( isset( $args['iv_load_policy'] ) && '3' === $args['iv_load_policy'] ) ? 3 : 1,

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'fs' => 1,

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'hl' => str_replace( '_', '-', get_locale() ),

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);

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if ( isset( $args['fmt'] ) && (int) $args['fmt'] ) {

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$params['fmt'] = (int) $args['fmt']; // Apparently an obsolete parameter. Not referenced on https://developers.google.com/youtube/player_parameters.

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}

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// The autohide parameter has been deprecated since 2015. See https://developers.google.com/youtube/player_parameters#august-19,-2015.

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if ( ! isset( $args['autohide'] ) || ( $args['autohide'] < 0 || 2 < $args['autohide'] ) ) {

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$params['autohide'] = 2;

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} else {

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$params['autohide'] = (int) $args['autohide'];

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}

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$start = 0;

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if ( isset( $args['start'] ) ) {

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$start = (int) $args['start'];

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} elseif ( isset( $args['t'] ) ) {

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if ( is_numeric( $args['t'] ) ) {

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$start = (int) $args['t'];

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} elseif ( is_string( $args['t'] ) ) {

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$time_pieces = preg_split( '/(?<=\D)(?=\d+)/', $args['t'] );

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foreach ( $time_pieces as $time_piece ) {

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$int = (int) $time_piece;

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switch ( substr( $time_piece, - 1 ) ) {

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case 'h':

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$start += $int * 3600;

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break;

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case 'm':

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$start += $int * 60;

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break;

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case 's':

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$start += $int;

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break;

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}

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}

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}

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}

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if ( $start ) {

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$params['start'] = (int) $start;

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}

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if ( isset( $args['end'] ) && (int) $args['end'] ) {

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$params['end'] = (int) $args['end'];

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}

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if ( isset( $args['hd'] ) && (int) $args['hd'] ) {

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$params['hd'] = (int) $args['hd']; // Now obsolete per https://developers.google.com/youtube/player_parameters#march-29,-2012.

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}

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if ( isset( $args['vq'] ) && in_array( $args['vq'], array( 'hd720', 'hd1080' ), true ) ) {

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$params['vq'] = $args['vq']; // Note, this appears to be obsolete. Not referenced on https://developers.google.com/youtube/player_parameters.

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}

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if ( isset( $args['cc_load_policy'] ) ) {

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$params['cc_load_policy'] = 1;

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}

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if ( isset( $args['cc_lang_pref'] ) ) {

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$params['cc_lang_pref'] = preg_replace( '/[^_a-z0-9-]/i', '', $args['cc_lang_pref'] );

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}

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// The wmode parameter appears to be obsolete. Not referenced on https://developers.google.com/youtube/player_parameters.

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if ( isset( $args['wmode'] ) && in_array( strtolower( $args['wmode'] ), array( 'opaque', 'window', 'transparent' ), true ) ) {

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$params['wmode'] = $args['wmode'];

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} else {

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$params['wmode'] = 'transparent';

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}

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// The theme parameter is obsolete per https://developers.google.com/youtube/player_parameters#august-19,-2015.

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if ( isset( $args['theme'] ) && in_array( strtolower( $args['theme'] ), array( 'dark', 'light' ), true ) ) {

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$params['theme'] = $args['theme'];

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}

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if ( isset( $args['list'] ) ) {

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$params['listType'] = 'playlist';

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$params['list'] = preg_replace( '|[^_a-z0-9-]|i', '', $args['list'] );

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}

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/**

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* Allow YouTube videos to start playing automatically.

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* @module shortcodes

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* @since 2.2.2

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* @param bool false Enable autoplay for YouTube videos.

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if ( apply_filters( 'jetpack_youtube_allow_autoplay', false ) && isset( $args['autoplay'] ) ) {

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$params['autoplay'] = (int) $args['autoplay'];

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}

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$is_amp = class_exists( 'Jetpack_AMP_Support' ) && Jetpack_AMP_Support::is_amp_request();

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if ( $is_amp && $id ) {

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// Note that <amp-youtube> currently is not well suited for playlists that don't have an individual video selected, hence the $id check above.

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$placeholder = sprintf(

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'<a href="%1$s" placeholder><amp-img src="%2$s" alt="%3$s" layout="fill" object-fit="cover"><noscript><img src="%2$s" loading="lazy" decoding="async" alt="%3$s"></noscript></amp-img></a>',

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esc_url( $video_url ),

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esc_url( $thumbnail ),

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esc_attr__( 'YouTube Poster', 'jetpack' ) // Would be preferable to provide YouTube video title, but not available in this non-oEmbed context.

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);

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$html_attributes = array();

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foreach ( $params as $param_name => $param_value ) {

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$html_attributes[] = sprintf(

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'data-param-%s="%s"',

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sanitize_key( $param_name ),

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esc_attr( $param_value )

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);

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}

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$html = sprintf(

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'<amp-youtube data-videoid="%s" %s width="%d" height="%d" layout="responsive">%s</amp-youtube>',

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esc_attr( $id ),

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implode( ' ', $html_attributes ), // Note: Escaping done above.

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esc_attr( $w ),

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esc_attr( $h ),

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$placeholder

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);

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} else {

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// In AMP, the AMP_Iframe_Sanitizer will convert into <amp-iframe> as required.

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$src = 'https://www.youtube.com/embed';

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if ( $id ) {

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$src .= "/$id";

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}

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$src = add_query_arg(

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array_merge(

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array( 'version' => 3 ),

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$params

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$src

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);

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[354] Fix | Delete

$layout = $is_amp ? 'layout="responsive" ' : '';

[355] Fix | Delete

[356] Fix | Delete

$html = sprintf(

[357] Fix | Delete

'<iframe class="youtube-player" width="%s" height="%s" %ssrc="%s" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>',

[358] Fix | Delete

esc_attr( $w ),

[359] Fix | Delete

esc_attr( $h ),

[360] Fix | Delete

$layout,

[361] Fix | Delete

esc_url( $src )

[362] Fix | Delete

);

[363] Fix | Delete

}

[364] Fix | Delete

[365] Fix | Delete

// Let's do some alignment wonder in a span, unless we're producing a feed.

[366] Fix | Delete

if ( ! is_feed() ) {

[367] Fix | Delete

$alignmentcss = 'text-align:center;';

[368] Fix | Delete

if ( isset( $args['align'] ) ) {

[369] Fix | Delete

switch ( $args['align'] ) {

[370] Fix | Delete

case 'left':

[371] Fix | Delete

$alignmentcss = "float:left; width:{$w}px; height:{$h}px; margin-right:10px; margin-bottom: 10px;";

[372] Fix | Delete

break;

[373] Fix | Delete

case 'right':

[374] Fix | Delete

$alignmentcss = "float:right; width:{$w}px; height:{$h}px; margin-left:10px; margin-bottom: 10px;";

[375] Fix | Delete

break;

[376] Fix | Delete

}

[377] Fix | Delete

}

[378] Fix | Delete

[379] Fix | Delete

$html = sprintf(

[380] Fix | Delete

'<span class="embed-youtube" style="%s display: block;">%s</span>',

[381] Fix | Delete

esc_attr( $alignmentcss ),

[382] Fix | Delete

$html

[383] Fix | Delete

);

[384] Fix | Delete

[385] Fix | Delete

}

[386] Fix | Delete

[387] Fix | Delete

/**

[388] Fix | Delete

* Format output for Calypso Reader/Notifications/Comments

[389] Fix | Delete

[390] Fix | Delete

if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {

[391] Fix | Delete

require_once WP_CONTENT_DIR . '/lib/display-context.php';

[392] Fix | Delete

$context = A8C\Display_Context\get_current_context();

[393] Fix | Delete

if ( A8C\Display_Context\NOTIFICATIONS === $context ) {

[394] Fix | Delete

return sprintf(

[395] Fix | Delete

'<a href="%1$s" target="_blank" rel="noopener noreferrer"><img src="%2$s" alt="%3$s" /></a>',

[396] Fix | Delete

esc_url( $video_url ),

[397] Fix | Delete

esc_url( $thumbnail ),

[398] Fix | Delete

esc_html__( 'YouTube video', 'jetpack' )

[399] Fix | Delete

);

[400] Fix | Delete

}

[401] Fix | Delete

}

[402] Fix | Delete

[403] Fix | Delete

/**

[404] Fix | Delete

* Filter the YouTube video HTML output.

[405] Fix | Delete

[406] Fix | Delete

* @module shortcodes

[407] Fix | Delete

[408] Fix | Delete

* @since 1.2.3

[409] Fix | Delete

[410] Fix | Delete

* @param string $html YouTube video HTML output.

[411] Fix | Delete

[412] Fix | Delete

$html = apply_filters( 'video_embed_html', $html );

[413] Fix | Delete

[414] Fix | Delete

return $html;

[415] Fix | Delete

}

[416] Fix | Delete

[417] Fix | Delete

/**

[418] Fix | Delete

* Gets the args present in the YouTube shortcode URL.

[419] Fix | Delete

[420] Fix | Delete

* @since 8.0.0

[421] Fix | Delete

[422] Fix | Delete

* @param array $url The parsed URL of the shortcode.

[423] Fix | Delete

[424] Fix | Delete

* @return array|false The query args of the URL, or false.

[425] Fix | Delete

[426] Fix | Delete

function jetpack_shortcode_youtube_args( $url ) {

[427] Fix | Delete

$qargs = array();

[428] Fix | Delete

if ( ! empty( $url['query'] ) ) {

[429] Fix | Delete

wp_parse_str( $url['query'], $qargs );

[430] Fix | Delete

} else {

[431] Fix | Delete

return false;

[432] Fix | Delete

}

[433] Fix | Delete

[434] Fix | Delete

$fargs = array();

[435] Fix | Delete

if ( ! empty( $url['fragment'] ) ) {

[436] Fix | Delete

wp_parse_str( $url['fragment'], $fargs );

[437] Fix | Delete

}

[438] Fix | Delete

[439] Fix | Delete

return array_merge( $fargs, $qargs );

[440] Fix | Delete

}

[441] Fix | Delete

[442] Fix | Delete

/**

[443] Fix | Delete

* Display the Youtube shortcode.

[444] Fix | Delete

[445] Fix | Delete

* @param array $atts Shortcode attributes.

[446] Fix | Delete

[447] Fix | Delete

* @return string The rendered shortcode.

[448] Fix | Delete

[449] Fix | Delete

function jetpack_youtube_shortcode( $atts ) {

[450] Fix | Delete

$url = ( isset( $atts[0] ) ) ? ltrim( $atts[0], '=' ) : shortcode_new_to_old_params( $atts );

[451] Fix | Delete

return jetpack_youtube_id( $url );

[452] Fix | Delete

}

[453] Fix | Delete

add_shortcode( 'youtube', 'jetpack_youtube_shortcode' );

[454] Fix | Delete

[455] Fix | Delete

/**

[456] Fix | Delete

* Gets the dimensions of the [youtube] shortcode.

[457] Fix | Delete

[458] Fix | Delete

* Calculates the width and height, taking $content_width into consideration.

[459] Fix | Delete

[460] Fix | Delete

* @since 8.0.0

[461] Fix | Delete

[462] Fix | Delete

* @param array $query_args The query args of the URL.

[463] Fix | Delete

[464] Fix | Delete

* @return array The width and height of the shortcode.

[465] Fix | Delete

[466] Fix | Delete

function jetpack_shortcode_youtube_dimensions( $query_args ) {

[467] Fix | Delete

$h = null;

[468] Fix | Delete

global $content_width;

[469] Fix | Delete

[470] Fix | Delete

$input_w = ( isset( $query_args['w'] ) && (int) $query_args['w'] ) ? (int) $query_args['w'] : 0;

[471] Fix | Delete

$input_h = ( isset( $query_args['h'] ) && (int) $query_args['h'] ) ? (int) $query_args['h'] : 0;

[472] Fix | Delete

[473] Fix | Delete

// If we have $content_width, use it.

[474] Fix | Delete

if ( ! empty( $content_width ) ) {

[475] Fix | Delete

$default_width = (int) $content_width;

[476] Fix | Delete

} else {

[477] Fix | Delete

// Otherwise get default width from the old, now deprecated embed_size_w option.

[478] Fix | Delete

$default_width = (int) get_option( 'embed_size_w' );

[479] Fix | Delete

}

[480] Fix | Delete

[481] Fix | Delete

// If we don't know those 2 values use a hardcoded width.

[482] Fix | Delete

if ( empty( $default_width ) ) {

[483] Fix | Delete

$default_width = 640;

[484] Fix | Delete

}

[485] Fix | Delete

[486] Fix | Delete

if ( $input_w > 0 && $input_h > 0 ) {

[487] Fix | Delete

$w = $input_w;

[488] Fix | Delete

$h = $input_h;

[489] Fix | Delete

} elseif ( 0 === $input_w && 0 === $input_h ) {

[490] Fix | Delete

if ( isset( $query_args['fmt'] ) && (int) $query_args['fmt'] ) {

[491] Fix | Delete

$w = ( ! empty( $content_width ) ? min( $content_width, 480 ) : 480 );

[492] Fix | Delete

} else {

[493] Fix | Delete

$w = ( ! empty( $content_width ) ? min( $content_width, $default_width ) : $default_width );

[494] Fix | Delete

$h = ceil( ( $w / 16 ) * 9 );

[495] Fix | Delete

}

[496] Fix | Delete

} elseif ( $input_w > 0 ) {

[497] Fix | Delete

$w = $input_w;

[498] Fix | Delete

$h = ceil( ( $w / 16 ) * 9 );

[499] Fix | Delete