You should be careful when using pointers. The following example shows how an array is unintentionally distorted if the pointer variable is not treated with unset
<?php
echo '<pre>';
$arr = array ( 'a' => 'a' , 'b' => 'b' ) ;
var_dump ($arr) ;
foreach ( $arr as $index => &$data ) {}
var_dump ($arr) ;
foreach ( $arr as $index => $data ) {}
var_dump ($arr) ;
?>
Output:
array(2) {
["a"]=>
string(1) "a"
["b"]=>
string(1) "b"
}
array(2) {
["a"]=>
string(1) "a"
["b"]=>
&string(1) "b"
}
array(2) {
["a"]=>
string(1) "a"
["b"]=>
&string(1) "a"
}
