How to remove all non-numeric characters from a string in php?

In this post, We can remove all non-alphanumeric characters from the string with preg_replace() function in PHP.

1. Code:

  <?php 
	function removeAllNonNumericCharacters($str){
		$result = preg_replace("/[^0-9]/", "", $str);
		return $result;
	} 
	
	$str = "Soltuts.com 1 is2 providin3 PHP4 tutorials5";
	echo(removeAllNonNumericCharacters($str));
    ?>

2. Example:

Input:

"Soltuts.com 1 is2 providin3 PHP4 tutorials5"

Output:

PHP