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run code in 300+ PHP versions simultaneously
<?php $a=" "; echo "enter the number of rows"; $b=fgets(STDIN); $num=1; for($a=1;a>$b;$a++) { echo "$a"; exit(0); }
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
enter the number of rows Fatal error: Uncaught Error: Undefined constant "a" in /in/qmKHc:6 Stack trace: #0 {main} thrown in /in/qmKHc on line 6
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
enter the number of rows Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/qmKHc on line 6 1
Output for 5.2.3 - 5.2.17, 5.3.0 - 5.3.29, 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
enter the number of rows Notice: Use of undefined constant a - assumed 'a' in /in/qmKHc on line 6 1
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 - 5.2.2
enter the number of rows Notice: Use of undefined constant STDIN - assumed 'STDIN' in /in/qmKHc on line 4 Warning: fgets(): supplied argument is not a valid stream resource in /in/qmKHc on line 4 Notice: Use of undefined constant a - assumed 'a' in /in/qmKHc on line 6 1

preferences:
220.23 ms | 403 KiB | 312 Q