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 style="color: #007F00">$1</span>"", $code ); // hightlight functions and other structures like --> function foobar() <--- $code = preg_replace( "/(s)(.*?)((|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", "<span style="color: #660066; background-color: #FFFCB1;"><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 style="color: #0000B3">$1</span>", $code ); /* The 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( "/(print|echo|new|function)/", "<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*/
希望本文所述对大家的php程序设计有所帮助。