* Performs a case-sensitive check indicating if

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* the haystack begins with needle.

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*

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* @since 5.9.0

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*

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* @param string $haystack The string to search in.

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* @param string $needle The substring to search for in the `$haystack`.

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* @return bool True if `$haystack` starts with `$needle`, otherwise false.

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*/

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function str_starts_with( $haystack, $needle ) {

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if ( '' === $needle ) {

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return true;

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}

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return 0 === strpos( $haystack, $needle );

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}

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}

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if ( ! function_exists( 'str_ends_with' ) ) {

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/**

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* Polyfill for `str_ends_with()` function added in PHP 8.0.

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*

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* Performs a case-sensitive check indicating if

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* the haystack ends with needle.

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*

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* @since 5.9.0

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*

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* @param string $haystack The string to search in.

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* @param string $needle The substring to search for in the `$haystack`.

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* @return bool True if `$haystack` ends with `$needle`, otherwise false.

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*/

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function str_ends_with( $haystack, $needle ) {

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if ( '' === $haystack ) {

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return '' === $needle;

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}

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$len = strlen( $needle );

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return substr( $haystack, -$len, $len ) === $needle;

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}

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}

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// IMAGETYPE_AVIF constant is only defined in PHP 8.x or later.

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if ( ! defined( 'IMAGETYPE_AVIF' ) ) {

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define( 'IMAGETYPE_AVIF', 19 );

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}

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// IMG_AVIF constant is only defined in PHP 8.x or later.

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if ( ! defined( 'IMG_AVIF' ) ) {

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define( 'IMG_AVIF', IMAGETYPE_AVIF );

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}

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