How to remove comments in php

php method to remove comments: first open the PHP test code file; then define a "removeComment" method; then remove the content of the comment through the "preg_replace" method; and finally run the PHP file.

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php remove comments

Test code

File: a.php

<?php
/**
 * 加法计算
 * 测试
 */
// 设定$a的值
$a = 10;
// 设定$b的值
$b = 5;
// 加法
$c = $a + $b;
# 输出结果
echo $c;

File: test.php

echo "源码：<br />";
show_source(&#39;./a.php&#39;);
echo "<hr />去除注释后：<br />";
highlight_string(removeComment(file_get_contents(&#39;./a.php&#39;)));

/**
 * 去除PHP代码注释
 * @param  string $content 代码内容
 * @return string 去除注释之后的内容
 */
function removeComment($content){
    return preg_replace("/(\/\*.*\*\/)|(#.*?\n)|(\/\/.*?\n)/s", &#39;&#39;, str_replace(array("\r\n", "\r"), "\n", $content));
}

Test output

Execute test .php, the output is as follows:

Regular Analysis

(\/\*.*\*\/)   匹配 /* */
(#.*?\n)       匹配 #      遇到第一个回车后结束
(\/\/.*?\n)    匹配 //     遇到第一个回车后结束

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