php如何删除注释

<?php
 
/**
 * Created by PhpStorm.
 * User: Yang
 * Date: 2019/10/16
 * Time: 10:25
 */
 
// 计算和
// 计算和
// 计算和
$a = 1;
$b = 2;
$c = $a+$b; //总和
 
/*
 * 求和函数
 */
function sum($a, $b) {
 
 return $a + $b; //返回值
}
 
# 第二种注释
$a = 1;
$b = 2;
## 求乘积
$c = $a * $b; # 结果
 
//特殊
$usedFuncs = "abcd";
preg_split("//is", implode("", $usedFuncs), -1, PREG_SPLIT_NO_EMPTY);

/**
 * Created by PhpStorm.
 * User: 25754
 * Date: 2019/10/17
 * Time: 9:54
 */
 
function removeComment($content)
{
 return preg_replace("/(/*(s|.)*?*/)|(//.(s|.*))|(#(s*)?(.*))/", '', str_replace(array("
", "
"), "
", $content));
}
 
$content = file_get_contents("./test.php");
echo removeComment($content);

$a = 1;
$b = 2;
$c = $a+$b;
 
function sum($a, $b) {
 
 return $a + $b; }
 
 
$a = 1;
$b = 2;
 
$c = $a * $b;
 
$usedFuncs = "abcd";
preg_split("