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run code in 300+ PHP versions simultaneously
<?php $f = get_declared_function(); echo implode("\n",preg_fiter('/^(is_)/','\1',$f['internal']))
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.29, 5.6.7 - 5.6.13
Parse error: syntax error, unexpected end of file, expecting ',' or ';' in /in/E8f8G on line 3
Process exited with code 255.
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171.46 ms | 1400 KiB | 63 Q