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<?php function compare_behaviour($arg1, $arg2) { $res1 = ($arg1 ?: $arg2); $res2 = ($arg1 or $arg2); if( $res1 === $res2 ){ echo "\n========\n"; var_dump($arg1, $arg2, $res1, $res2); } } compare_behaviour(false, true); compare_behaviour(0, 1); compare_behaviour(0, 0); compare_behaviour(NULL, []);
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
======== bool(false) bool(true) bool(true) bool(true)
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/amOEH on line 16
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 ':' in /in/amOEH on line 4
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 ':' in /in/amOEH on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/amOEH on line 4
Process exited with code 255.
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200.16 ms | 401 KiB | 312 Q