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--TEST--
Testing interface_exists()
--FILE--
<?php
interface foo {
}
var_dump(interface_exists('foo'));
var_dump(interface_exists(1));
var_dump(interface_exists(NULL));
var_dump(interface_exists(new stdClass));
?>
--EXPECTF--
bool(true)
bool(false)
bool(false)
Warning: interface_exists() expects parameter 1 to be string, object given in %s on line %d
NULL
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