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<?php error_reporting(-1); phpversion() >= "5.6.0" or die(); $a = 1; unset($a); $g = array_filter($GLOBALS, function($k) { return !in_array($k, ["g", "HTTP_RAW_POST_DATA", "GLOBALS", "_FILES", "_REQUEST", "_SESSION", "_ENV", "_SERVER", "_GET", "_POST", "_COOKIE", "argv", "argc"]); }, ARRAY_FILTER_USE_KEY); var_dump(count($g)); var_dump($g); var_dump(array_keys($g)); var_dump($g['a']);
Output for 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.24, 7.3.0 - 7.3.12
int(0) array(0) { } array(0) { } Notice: Undefined index: a in /in/hVcAB on line 15 NULL
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/hVcAB on line 9
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/hVcAB on line 8
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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/hVcAB on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/hVcAB on line 8
Process exited with code 255.

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