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 doc http://php.net/manual/en/control-structures.foreach.php clearly states why you have a problem:

"In order to be able to directly modify array elements within the loop precede $value with &. In that case the value will be assigned by reference."

Referencing $value is only possible if the iterated array can be referenced (i.e. if it is a variable). The following code won't work: