Sri Lanka Mobile number validation in PHP

sl_mobile_num.php

<?php
$a =	'+94715753168';
$b =	'0715753168';
$c =	'715753168';
$d =	'0094715753168';
$e =	'094-71-5-753-168';

is_lk_mobile($a); //true
is_lk_mobile($b); //true
is_lk_mobile($c); //true
is_lk_mobile($d); //true
is_lk_mobile($e); //true


function clean_num($num){
	$num=preg_replace('/[^0-9]/', '', $num); // remove non-numericals
	$num=ltrim($num,'0'); //remove leading zeros
	return $num;	
}


function check_for_mobile($num){
	$mobile_phone_codes = ['70', '71', '72', '75', '76', '77', '78'];
				if(	in_array(substr($num, 0, 2), $mobile_phone_codes ) ){
						return true;
				}	
				return false;
}

/**
* @returns bool
**/
function is_lk_mobile($str){
	$cleaned = clean_num($str);
	if(strlen($cleaned)<9) return false;

	if(strlen($cleaned)==9){
			return check_for_mobile($cleaned);
	}else {
			$last9 = substr($cleaned, -9);
			return check_for_mobile($last9) && str_replace($last9, '', $cleaned)=='94';
	}
}

In line number 17, the trim() function will remove the ending '0's as well.

e.g. 0715753160 > 71575316 and 0715000000 > 715

use ltrim() instead of trim()

changed trim() to ltrim()
@ijasxyz Thanks !