3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo "start",PHP_EOL; $i=0; $b=1; $z=2; echo "before loop",PHP_EOL; while (true) { $i++; $b*=2; $z**=$z; echo "inside loop",PHP_EOL; if ($z>1e300) goto w0; } echo "after loop, something went wrong... debugging :)",PHP_EOL; var_dump($i, $b, $z); w0: echo "after loop",PHP_EOL; echo "after default",PHP_EOL;
Output for 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
start before loop inside loop inside loop inside loop after loop after default
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35
Parse error: syntax error, unexpected '*=' (T_MUL_EQUAL) in /in/jR7q4 on line 12
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 - 5.3.29
Parse error: syntax error, unexpected T_MUL_EQUAL in /in/jR7q4 on line 12
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 T_MUL_EQUAL in /in/jR7q4 on line 12
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/jR7q4 on line 12
Process exited with code 255.

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