php实现简单的语法高亮函数实例分析_PHP教程

程序员文章站 2022-05-23 23:53:18

...

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

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 '

';
            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。

php实现简单的语法高亮函数实例分析_PHP教程