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@ 2013-09-13T17:14:48Z

<?php
class ClassName {
}

if (class_exists('ClassName') && defined('Class::CONSTANT')) {
    echo "exists";
}

Output
Performance
VLD
References
Branches

class_exists: documentation ( source)
defined: documentation ( source)

preferences:dark modelive preview

33.86 ms | 402 KiB | 5 Q