php实现简单的语法高亮函数实例分析

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

"foobar" <-- $code = preg_replace( '/"(.*?)"/U','""',$code ); // hightlight functions and other structures like --> function foobar() <--- $code = preg_replace( '/(\s)\b(.*?)((\b|\s)\()/U','$1$3',$code ); // Match comments (like /* */): $code = preg_replace( '/(\/\/)(.+)\s/','$0',$code ); $code = preg_replace( '/(\/\*.*?\*\/)/s',$code ); // hightlight braces: $code = preg_replace('/(\(|\[|\{|\}|\]|\)|\->)/','

$1

',$code); // hightlight variables $foobar $code = preg_replace( '/(\$[a-zA-Z0-9_]+)/','',$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 $code = preg_replace( '/\b(print|echo|new|function)\b/','',$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 '

';
print Syntax_highlight($example_PHP_code);
print '

'; /*example-end*/

希望本文所述对大家的PHP程序设计有所帮助。