make_clickable()

将纯文本URI转换为HTML链接。

原型

make_clickable( string $text )

描述

转换URI，www和ftp以及电子邮件地址。通过修复链接中的链接来完成。

参数

$text (string) (Required) 要转换URI的内容。

返回值

(string)  已转换URI的内容。

源文件

路径：wp-includes/formatting.php

<?php
...
function make_clickable( $text ) {
	$r = '';
	$textarr = preg_split( '/(<[^<>]+>)/', $text, -1, PREG_SPLIT_DELIM_CAPTURE ); // split out HTML tags
	$nested_code_pre = 0; // Keep track of how many levels link is nested inside <pre> or <code>
	foreach ( $textarr as $piece ) {
		if ( preg_match( '|^<code[s>]|i', $piece ) || preg_match( '|^<pre[s>]|i', $piece ) || preg_match( '|^<script[s>]|i', $piece ) || preg_match( '|^<style[s>]|i', $piece ) )
			$nested_code_pre++;
		elseif ( $nested_code_pre && ( '</code>' === strtolower( $piece ) || '</pre>' === strtolower( $piece ) || '</script>' === strtolower( $piece ) || '</style>' === strtolower( $piece ) ) )
			$nested_code_pre--;
		if ( $nested_code_pre || empty( $piece ) || ( $piece[0] === '<' && ! preg_match( '|^<s*[w]{1,20}+://|', $piece ) ) ) {
			$r .= $piece;
			continue;
		}
		// Long strings might contain expensive edge cases ...
		if ( 10000 < strlen( $piece ) ) {
			// ... break it up
			foreach ( _split_str_by_whitespace( $piece, 2100 ) as $chunk ) { // 2100: Extra room for scheme and leading and trailing paretheses
				if ( 2101 < strlen( $chunk ) ) {
					$r .= $chunk; // Too big, no whitespace: bail.
				} else {
					$r .= make_clickable( $chunk );
				}
			}
		} else {
			$ret = " $piece "; // Pad with whitespace to simplify the regexes
			$url_clickable = '~
				([\s(<.,;:!?])                                        # 1: Leading whitespace, or punctuation
				(                                                      # 2: URL
					[\w]{1,20}+://                                # Scheme and hier-part prefix
					(?=S{1,2000}s)                               # Limit to URLs less than about 2000 characters long
					[\w\x80-\xff#%\~/@\[\]*(+=&$-]*+         # Non-punctuation URL character
					(?:                                            # Unroll the Loop: Only allow puctuation URL character if followed by a non-punctuation URL character
						['.,;:!?)]                            # Punctuation URL character
						[\w\x80-\xff#%\~/@\[\]*(+=&$-]++ # Non-punctuation URL character
					)*
				)
				()?)                                                  # 3: Trailing closing parenthesis (for parethesis balancing post processing)
			~xS'; // The regex is a non-anchored pattern and does not have a single fixed starting character.
			      // Tell PCRE to spend more time optimizing since, when used on a page load, it will probably be used several times.
			$ret = preg_replace_callback( $url_clickable, '_make_url_clickable_cb', $ret );
			$ret = preg_replace_callback( '#([s>])((www|ftp).[w\x80-\xff#$%&~/.-;:=,[email protected][]+]+)#is', '_make_web_ftp_clickable_cb', $ret );
			$ret = preg_replace_callback( '#([s>])([.0-9a-z_+-]+)@(([0-9a-z-]+.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret );
			$ret = substr( $ret, 1, -1 ); // Remove our whitespace padding.
			$r .= $ret;
		}
	}
	// Cleanup of accidental links within links
	return preg_replace( '#(<a([ rnt]+[^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i', "$1$3</a>", $r );
}
...
?>

其他

英文文档：https://developer.wordpress.org/reference/functions/make_clickable/