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','"<span style="color: #007F00">$1</span>"',$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） ***/
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