3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'b'; $b = ''; echo $a; \printf();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
b Fatal error: Uncaught ArgumentCountError: printf() expects at least 1 argument, 0 given in /in/BS6Od:6 Stack trace: #0 /in/BS6Od(6): printf() #1 {main} thrown in /in/BS6Od on line 6
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
b Warning: printf() expects at least 1 parameter, 0 given in /in/BS6Od on line 6
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
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/BS6Od on line 6 b Warning: Wrong parameter count for printf() in /in/BS6Od on line 6

preferences:
244.72 ms | 402 KiB | 350 Q