How to remove numbers from left string in php?

The function returns a substring from the left to the position with the first numeric character.

1. Code:

<?php 
	function removeNumericFromLeftString($str){
		$i = 0;
		while ($i <= strlen($str) - 1 && !is_numeric($str[$i])) {
			$i++;
		}
		return substr($str, 0, $i);
	}
	$str = "Soltuts.com1234 is providing PHP tutorials";
	$str = removeNumericFromLeftString($str);
	echo($str);
    ?> 

2. Example:

Input:

"Soltuts.com1234 is providing PHP tutorials"

Output:

Soltuts.com