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@ 2018-01-29T13:59:38Z

<?php
$config = [];
$foo = is_callable($config['callable']);
$config['callable'] = 'nonexistent_callable';
$bar = is_callable($config['callable']);
$config['callable'] = 'strtolower';
$baz = is_callable($config['callable']);

Output
Performance
VLD
References
Branches

is_callable: documentation ( source)

preferences:dark modelive previewkey bindings

26.28 ms | 404 KiB | 5 Q