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<?php $foobar; var_dump(array_key_exists("foobar", get_defined_vars())); $foobar = null; var_dump(array_key_exists("foobar", get_defined_vars()));
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
bool(false) bool(true)
Output for 5.0.4 - 5.0.5
Notice: Undefined variable: foobar in /in/39gXr on line 3 bool(false) bool(true)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
Notice: Undefined variable: foobar in /in/39gXr on line 3 bool(false) bool(true)
preferences:
149.52 ms | 409 KiB | 5 Q