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run code in 300+ PHP versions simultaneously
<?php   //echo 'Tomorrow I \'ll learn PHP global variables.'; //echo 'This is a bad command : del c:\\*.*';  ?>  
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.32, 7.2.29 - 7.2.33, 7.3.16 - 7.3.31, 7.4.3 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
<?php   //echo 'Tomorrow I \'ll learn PHP global variables.'; //echo 'This is a bad command : del c:\\*.*';  ?>  
Output for 8.0.13
Parse error: syntax error, unexpected identifier " " in /in/S9iom on line 2
Process exited with code 255.
Output for 7.3.32 - 7.3.33, 7.4.33
Parse error: syntax error, unexpected ' ' (T_STRING) in /in/S9iom on line 2
Process exited with code 255.
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102 ms | 401 KiB | 202 Q