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
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('./a.php');
echo "<hr />去除注释后：<br />";
highlight_string(removeComment(file_get_contents('./a.php')));
/**
* 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", '', str_replace(array("\r\n", "\r"), "\n", $content));
}Execute test .php, the output is as follows: 
(\/\*.*\*\/) 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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