php实现简单的语法高亮函数实例分析_PHP教程

php实现简单的语法高亮函数实例分析

 　　这篇文章主要介绍了php实现简单的语法高亮函数,实例分析了php通过正则表达式实现语法高亮的相关技巧,需要的朋友可以参考下

　　本文实例讲述了php实现简单的语法高亮函数。分享给大家供大家参考。具体分析如下：

　　这是一个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

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function syntax_highlight($code){ // this matches --> "foobar" $code = preg_replace( '/"(.*?)"/U', '"$1"', $code ); // hightlight functions and other structures like --> function foobar() $code = preg_replace( '/(\s)\b(.*?)((\b|\s)\()/U', '$1$2$3', $code ); // Match comments (like /* */): $code = preg_replace( '/(\/\/)(.+)\s/', '$0', $code ); $code = preg_replace( '/(\/\*.*?\*\/)/s', '$0', $code ); // hightlight braces: $code = preg_replace('/(\(|\[|\{|\}|\]|\)|\->)/', '$1', $code); // hightlight variables $foobar $code = preg_replace( '/(\$[a-zA-Z0-9_]+)/', '$1', $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/', '$1', $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: " . $example;'; // output the formatted code: print ' '; <p>print syntax_highlight($example_php_code);</p> <p>print '</p> '; /*example-end*/

　　希望本文所述对大家的php程序设计有所帮助。

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