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run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(class_exists('Composer\Autoload\ClassLoader', false));
Output for 5.0.0 - 7.2.0
bool(false)
Output for 4.3.0 - 4.4.9
Warning: Wrong parameter count for class_exists() in /in/uSZmC on line 3 NULL