[PHP-NOTES] note 130363 added to language.references

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) ;

// unset($data);

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"
}
----
Server IP: 45.112.84.4
Probable Submitter: 80.90.5.137 (proxied: 212.91.255.90)
----
Manual Page -- https://php.net/manual/en/language.references.php
Edit        -- https://main.php.net/note/edit/130363
Del: integrated  -- https://main.php.net/note/delete/130363/integrated
Del: useless     -- https://main.php.net/note/delete/130363/useless
Del: bad code    -- https://main.php.net/note/delete/130363/bad+code
Del: spam        -- https://main.php.net/note/delete/130363/spam
Del: non-english -- https://main.php.net/note/delete/130363/non-english
Del: in docs     -- https://main.php.net/note/delete/130363/in+docs
Del: other reasons-- https://main.php.net/note/delete/130363
Reject      -- https://main.php.net/note/reject/130363
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