- print_r: documentation ( source)
<?php
$array1 = array("1","2","3","4","5");
$array2 = array("apple","banana","","dog","");
$res = [];
foreach($array1 as $ind=>$num){
$res[$num] = $array2[$ind] === "" ? "No Value" : $array2[$ind];
}
print_r($res);