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

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

希望本文所述对大家的php程序设计有所帮助。