3v4l.org

run code in 300+ PHP versions simultaneously
<?php $num = 0; echo (int) !$num; //method 1 echo array(1,0)[$num]; //method 2 echo (int) ($num < 1); //method 3 echo (int)empty($num); //method 4
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
1111

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135.26 ms | 408 KiB | 5 Q