@ 2016-11-21T16:40:59Z <?php
$a = 'foo';
echo PHP_EOL, 'unset cast', PHP_EOL;
var_dump((unset) $a);
var_dump($a);
echo PHP_EOL, 'unset call', PHP_EOL;
unset($a);
var_dump($a);
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Output for 8.0.0 - 8.0.30 , 8.1.0 - 8.1.27 , 8.2.0 - 8.2.17 , 8.3.0 - 8.3.4 Fatal error: The (unset) cast is no longer supported in /in/PqkIG on line 6
Process exited with code 255 . Output for 7.2.0 - 7.2.33 , 7.3.0 - 7.3.31 , 7.4.0 - 7.4.33 Deprecated: The (unset) cast is deprecated in /in/PqkIG on line 6
unset cast
NULL
string(3) "foo"
unset call
Notice: Undefined variable: a in /in/PqkIG on line 10
NULL
Output for 7.3.32 - 7.3.33 unset cast
NULL
string(3) "foo"
unset call
NULL
Output for 5.6.0 - 5.6.28 , 7.0.0 - 7.0.20 , 7.1.0 - 7.1.33 unset cast
NULL
string(3) "foo"
unset call
Notice: Undefined variable: a in /in/PqkIG on line 10
NULL
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196.17 ms | 402 KiB | 218 Q