使用PHP将URL转换为Slug

Question

I'm using the below code to try and convert to slug and for some reason it's not echoing anything. I know I'm missing something extremely obvious. Am I not calling the function?

<?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;
        }

?>

Answer 1

You are echoing after the code exit from function.

try like this:

 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;

Or like this:

 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;