Question

wp_staticize_emoji( string $text )

Convert emoji to a static img element.

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description

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参数

$text

(string) (Required) The content to encode.

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返回值

(string) The encoded content.

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源代码

File: wp-includes/formatting.php

function wp_staticize_emoji( $text ) {
	$text = wp_encode_emoji( $text );

	/** This filter is documented in wp-includes/formatting.php */
	$cdn_url = apply_filters( 'emoji_url', 'https://s.w.org/images/core/emoji/2.3/72x72/' );

	/** This filter is documented in wp-includes/formatting.php */
	$ext = apply_filters( 'emoji_ext', '.png' );

	$output = '';
	/*
	 * HTML loop taken from smiley function, which was taken from texturize function.
	 * It'll never be consolidated.
	 *
	 * First, capture the tags as well as in between.
	 */
	$textarr = preg_split( '/(<.*>)/U', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
	$stop = count( $textarr );

	// Ignore processing of specific tags.
	$tags_to_ignore = 'code|pre|style|script|textarea';
	$ignore_block_element = '';

	for ( $i = 0; $i < $stop; $i++ ) {
		$content = $textarr[$i];

		// If we're in an ignore block, wait until we find its closing tag.
		if ( '' == $ignore_block_element && preg_match( '/^<(' . $tags_to_ignore . ')>/', $content, $matches ) )  {
			$ignore_block_element = $matches[1];
		}

		// If it's not a tag and not in ignore block.
		if ( '' ==  $ignore_block_element && strlen( $content ) > 0 && '<' != $content[0] ) {
			$matches = array();
			if ( preg_match_all( '/(&#x1f1(e[6-9a-f]|f[0-9a-f]);){2}/', $content, $matches ) ) {
				if ( ! empty( $matches[0] ) ) {
					foreach ( $matches[0] as $flag ) {
$chars = str_replace( array( '&#x', ';'), '', $flag );

list( $char1, $char2 ) = str_split( $chars, 5 );
$entity = sprintf( '<img src="%s" alt="%s" class="wp-smiley" style="height: 1em; max-height: 1em;" />', $cdn_url . $char1 . '-' . $char2 . $ext, html_entity_decode( $flag ) );

$content = str_replace( $flag, $entity, $content );
					}
				}
			}

			// Loosely match the Emoji Unicode range.
			$regex = '/(&#x[2-3][0-9a-f]{3};|&#x1f[1-6][0-9a-f]{2};)/';

			$matches = array();
			if ( preg_match_all( $regex, $content, $matches ) ) {
				if ( ! empty( $matches[1] ) ) {
					foreach ( $matches[1] as $emoji ) {
$char = str_replace( array( '&#x', ';'), '', $emoji );
$entity = sprintf( '<img src="%s" alt="%s" class="wp-smiley" style="height: 1em; max-height: 1em;" />', $cdn_url . $char . $ext, html_entity_decode( $emoji ) );

$content = str_replace( $emoji, $entity, $content );
					}
				}
			}
		}

		// Did we exit ignore block.
		if ( '' != $ignore_block_element && '</' . $ignore_block_element . '>' == $content )  {
			$ignore_block_element = '';
		}

		$output .= $content;
	}

	return $output;
}

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更新日志

Version	description
4.2.0	Introduced.

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相关函数

Uses

• wp-includes/formatting.php: wp_encode_emoji()
• wp-includes/formatting.php: emoji_url
• wp-includes/formatting.php: emoji_ext
• wp-includes/plugin.php: apply_filters()

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Used By

• wp-includes/formatting.php: wp_staticize_emoji_for_email()

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User Contributed Notes