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<?php $numeric_fails = 0; $non_numeric_fails = 0; $iterations = 1000; $results = array( 'Numeric Equal' => NULL, 'Non-numeric Equal' => NULL, 'Numeric Fail' => NULL, 'Non-numeric Fail' => NULL ); for ($i = 0; $i < $iterations; $i++) { $my_key = uniqid("\x00"); $var = array(); $var[$my_key] = TRUE; foreach ($var as $key => $val) { if ($key === $my_key) { if (is_numeric($my_key)) { $results['Numeric Equal'] = TRUE; } else { $results['Non-numeric Equal'] = TRUE; } } else { if (is_numeric($my_key)) { $results['Numeric Fail'] = TRUE; } else { $results['Non-numeric Fail'] = TRUE; } } } } var_dump($results);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 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 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.24, 7.3.0 - 7.3.12
array(4) { ["Numeric Equal"]=> NULL ["Non-numeric Equal"]=> bool(true) ["Numeric Fail"]=> NULL ["Non-numeric Fail"]=> NULL }

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