Changing value inside foreach loop doesn't change value in the array being iterated over

Question

Why does this yield this:

foreach( $store as $key => $value){
$value = $value.\".txt.gz\";
}

unset($value);

print_r ($store);

Array
(
[1] => 101Phon         


        

Answer 1

The $value variable in the array is temporary, it does not refer to the entry in the array.
If you want to change the original array entry, use a reference:

foreach ($store as $key => &$value) {
                       //  ^ reference
    $value .= '.txt.gz';
}