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[2007-08-11 09:29 UTC] rodji at tut dot by
Description:
------------
Tested on:
Apache/1.3.33 (Win32)
PHP/4.4.7 and 5.2.3
trouble with references in functions
Reproduce code:
---------------
function args_select($args, $args_list, $def_val) {
$r = array();
foreach ($args_list as $key) {
if (array_key_exists($key, $args)){
$r[$key] = $args[$key];
}else{
$r[$key] = $def_val; //equal $r[$key] =& $def_val why???
//$r[$key] = (string)$def_val; //solution#1
}
}
return $r;
}
$argums = array('action'=>'edit', 'id'=>1);
$select = array('action','to_do','back');
//debug_zval_dump(args_select($argums, $select, ''));
extract(args_select($argums, $select, ''), EXTR_OVERWRITE | EXTR_REFS);
//solution#2 why???
/*$m = args_select($argums, $select, '');
//OR //$m =& args_select($argums, $select, '');
extract($m, EXTR_OVERWRITE | EXTR_REFS);
*/
$to_do = 'new';
debug_zval_dump (&$back);
?>
Expected result:
----------------
&string(0) "" refcount(2)
Actual result:
--------------
&string(3) "new" refcount(3)
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Last updated: Thu Nov 27 12:00:01 2025 UTC |
Reproduce code: --------------- function /*&*/f($val) { //eq &f $r['a'] = $val; //equal =& $r['b'] = $val; //equal =& return $r; } //debug_zval_dump(f('old')); extract(f('old_value'), EXTR_REFS); //$t =& f('old_value'); extract($t, EXTR_REFS); unset($t); $a = 'new_value'; debug_zval_dump (&$b); Expected result: ---------------- &string(9) "old_value" refcount(2) Actual result: -------------- &string(9) "new_value" refcount(3)