@ 2013-06-19T08:48:34Z <?php
$arr = array(
'a' => 'A',
'b' => 'B',
'c' => 'C');
var_dump($arr);
// Taking "$val" as a reference here allows modifying the parent hashtable
// directly, i.e. the $val ref "knows" its parent key in some sense
foreach ($arr as &$val) {
if ($val == 'B') {
$val = 'X';
}
}
var_dump($arr);
// However, it doesn't allow you to unset the parent key...
foreach ($arr as &$val) {
if ($val == 'B') {
unset($val);
}
}
var_dump($arr);
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Output for 5.2.1 - 5.2.17 , 5.3.0 - 5.3.29 , 5.4.0 - 5.4.45 , 5.5.24 - 5.5.35 , 5.6.8 - 5.6.28 , 7.0.0 - 7.0.20 , 7.1.0 - 7.1.20 , 7.2.0 - 7.2.33 , 7.3.12 - 7.3.33 , 7.4.0 - 7.4.33 , 8.0.0 - 8.0.30 , 8.1.0 - 8.1.28 , 8.2.0 - 8.2.18 , 8.3.0 - 8.3.6 array(3) {
["a"]=>
string(1) "A"
["b"]=>
string(1) "B"
["c"]=>
string(1) "C"
}
array(3) {
["a"]=>
string(1) "A"
["b"]=>
string(1) "X"
["c"]=>
&string(1) "C"
}
array(3) {
["a"]=>
string(1) "A"
["b"]=>
string(1) "X"
["c"]=>
&string(1) "C"
}
Output for 5.0.0 - 5.0.5 , 5.1.0 - 5.1.6 , 5.2.0 array(3) {
["a"]=>
string(1) "A"
["b"]=>
string(1) "B"
["c"]=>
string(1) "C"
}
array(3) {
["a"]=>
&string(1) "A"
["b"]=>
&string(1) "X"
["c"]=>
&string(1) "C"
}
array(3) {
["a"]=>
&string(1) "A"
["b"]=>
&string(1) "X"
["c"]=>
&string(1) "C"
}
Output for 4.4.2 - 4.4.9 Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/VeY66 on line 12
Process exited with code 255 . Output for 4.3.0 - 4.3.1 , 4.3.5 - 4.3.11 , 4.4.0 - 4.4.1 Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/VeY66 on line 12
Process exited with code 255 . Output for 4.3.2 - 4.3.4 Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/VeY66 on line 12
Process exited with code 255 . preferences:dark mode live preview
212.94 ms | 401 KiB | 314 Q