delete a part of string with php

Question

i want delete a part of string. for example i have this string

13|5

and i want to reach the sub string located before the char |. it means i have this 13|5 and i want 13. location of | is unknown. for example maybe the string is 125|354 and again i want 125

<?php foreach($first as $key => $value){
    echo $key."</br>";
    //$key =  13|5//
    // write a function to reach 13//
}?>

Answer 1

You need to use combination of substr() and strpos()

$str = '125|354';
$newStr = substr($str, 0, strpos($str, '|'));
// 125