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run code in 200+ php & hhvm versions
Bugs & Features
<?php function test_isset() { return 1234; } echo "test_isset() => "; if (isset(test_isset())) { echo "set\n"; } else { echo "not set\n"; }
Output for 5.4.18 - 5.4.22
Fatal error: Can't use function return value in write context in /in/BvhKm on line 7
Process exited with code 255.
Output for 5.3.0 - 5.4.17
Fatal error: Can't use function return value in write context in /in/lq0vg on line 7
Process exited with code 255.