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run code in 300+ PHP versions simultaneously
<?php ob_start('assert'); echo 'phpinfo()===$out=ob_get_contents()'; ob_get_flush(); echo $out;
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
Warning: Undefined variable $out in /in/HUv05 on line 6
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
phpinfo()===$out=ob_get_contents() Warning: Cannot call assert() with string argument dynamically in /in/HUv05 on line 5 Notice: Undefined variable: out in /in/HUv05 on line 6
Output for 7.3.32 - 7.3.33
phpinfo()===$out=ob_get_contents() Warning: Cannot call assert() with string argument dynamically in /in/HUv05 on line 5
Output for 7.0.1 - 7.0.20
phpinfo()===$out=ob_get_contents() Warning: phpinfo() has been disabled for security reasons in /in/HUv05(5) : assert code on line 1 Warning: assert(): 9: "phpinfo()===$out=ob_get_contents()" failed in /in/HUv05 on line 5 phpinfo()===$out=ob_get_contents() Warning: phpinfo() has been disabled for security reasons in /in/HUv05(5) : assert code on line 1
Output for 5.4.8 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0
phpinfo()===$out=ob_get_contents() Warning: phpinfo() has been disabled for security reasons in /in/HUv05(5) : assert code on line 1
Output for 5.4.0 - 5.4.7
Notice: Undefined variable: out in /in/HUv05 on line 6

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