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<?php $bool = false; echo 'is ', var_export($bool, true), 'empty? ', var_export(empty($bool)), "\n"; $str = (string)$bool; echo 'is ', var_export($str, true), 'empty? ', var_export(empty($str)), "\n"; $bool = (bool)$string; echo 'is ', var_export($bool, true), 'empty? ', var_export(empty($bool)), "\n";
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
is falseempty? true is ''empty? true Warning: Undefined variable $string in /in/KVO3s on line 8 is falseempty? true
Output for 5.0.4 - 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 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
is falseempty? true is ''empty? true Notice: Undefined variable: string in /in/KVO3s on line 8 is falseempty? true
Output for 7.3.32 - 7.3.33, 7.4.26
is falseempty? true is ''empty? true is falseempty? true
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
is falseempty? true is ''empty? true Notice: Undefined variable: string in /in/KVO3s on line 8 is falseempty? true
preferences:
271.66 ms | 402 KiB | 425 Q