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run code in 300+ PHP versions simultaneously
<?php $a = true; --$a; if($a == true){ echo "đã true"; }else{ echo "vẫn false"; } echo PHP_EOL.$a; $b = null; echo ++$b;
Output for 8.3.0 - 8.3.4
Warning: Decrement on type bool has no effect, this will change in the next major version of PHP in /in/WngM8 on line 5 đã true 11
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17
đã true 11

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232.26 ms | 403 KiB | 283 Q