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 Search -- https://main.php.net/manage/user-notes.php