php 语法高亮函数示例

一个PHP实现的简单语法高亮显示的函数，注意：这个函数设计的比较简单，可能对某些语法不能高亮显示，你可以自己扩充该函数的功能，PHP语法高亮函数，感兴趣的小伙伴，下面一起跟随编程之家 jb51.cc的小编来看看吧。
经测试代码如下：

/**
 * 简单语法高亮显示的函数
 *
 * @param 
 * @arrange (编程之家) jb51.cc
 **/
function Syntax_highlight($code){
 
    // this matches --> foobar <--
    $code = preg_replace(
        '/(.*?)/U','&quot;<span style=color: #007F00>$1</span>&quot;',$code
    );
 
    // hightlight functions and other structures like --> function foobar() <--- 
    $code = preg_replace(
        '/(\s)\b(.*?)((\b|\s)\()/U','$1<span style=color: #0000ff>$2</span>$3',$code
    );
 
    // Match comments (like /* */): 
    $code = preg_replace(
        '/(\/\/)(.+)\s/','<span style=color: #660066; background-color: #FFFCB1;><i>$0</i></span>',$code
    );
 
    $code = preg_replace(
        '/(\/\*.*?\*\/)/s',$code
    );
 
    // hightlight braces:
    $code = preg_replace('/(\(|\[|\{|\}|\]|\)|\->)/','<strong>$1</strong>',$code);
 
    // hightlight variables $foobar
    $code = preg_replace(
        '/(\$[a-zA-Z0-9_]+)/','<span style=color: #0000B3>$1</span>',$code
    );
 
    /* The \b in the pattern indicates a word boundary,so only the distinct
    ** word web is matched,and not a word partial like webbing or cobweb 
    */
 
    // special words and functions
    $code = preg_replace(
        '/\b(print|echo|new|function)\b/','<span style=color: #7F007F>$1</span>',$code
    );
 
    return $code;
}
 
 
/*example-start*/
 
/*
** Create some example PHP code:
*/
 
$example_PHP_code = '
// some code comment:
$example = foobar;
 
print $_SERVER[REMOTE_ADDR];
 
$array = array(1,2,3,4,5);
 
function example_function($str) {
    // reverse string
    echo strrev($obj);
}
 
print example_function(foo);
 
/*
** A multiple line comment
*/
 
print Something:  . $example;';
 
 
// output the formatted code:
print '<pre>';
print Syntax_highlight($example_PHP_code);
print '</pre>';
 
/*example-end*/


/***   代码来自编程之家 jb51.cc（jb51.cc）   ***/

原文地址：https://www.jb51.cc/php/528914.html