使用PHP将URL转换为Slug

我正在使用下面的代码尝试转换为slug，但由于某些原因，它没有响应任何内容。我知道我遗漏了一些非常明显的东西。我不是在调用函数吗

<?php 

        $string = "Can't You Convert This To A Slug?";

        function clean($string) {
           $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.
           return preg_replace('/[^A-Za-z0-9\-]/', '', $string); // Removes special chars.
           echo $string;
        }

?>

---

代码退出函数后，您将进行回音

试着这样做：

 function clean_string($string) {
   $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.
   return preg_replace('/[^A-Za-z0-9\-]/', '', $string); // Removes special chars.
 }

$some = clean_string("Can't You Convert This To A Slug?");

echo $some;

 function clean_me(&$string) {
   $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.
   $string = preg_replace('/[^A-Za-z0-9\-]/', '', $string); // Removes special chars.
 }

$some = "Can't You Convert This To A Slug?";

clean_me($some);

echo $some;

或者像这样：

 function clean_string($string) {
   $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.
   return preg_replace('/[^A-Za-z0-9\-]/', '', $string); // Removes special chars.
 }

$some = clean_string("Can't You Convert This To A Slug?");

echo $some;

 function clean_me(&$string) {
   $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.
   $string = preg_replace('/[^A-Za-z0-9\-]/', '', $string); // Removes special chars.
 }

$some = "Can't You Convert This To A Slug?";

clean_me($some);

echo $some;

什么是slug？你在slug中覆盖的URL在哪里？@Shahar在
WordPress
中的说法
slug
是特定帖子的
URL键。你永远不会调用该方法。。。添加
clean（$string）在底部。