(PHP 5)
ReflectionClass::isInstance — Checks class for instance
Checks if an object is an instance of a class.
The object being compared to.
成功时返回 TRUE， 或者在失败时返回 FALSE.
Example #1 ReflectionClass::isInstance() related examples
<?php
// Example usage
$class = new ReflectionClass('Foo');
if ($class->isInstance($arg)) {
echo "Yes";
}
// Equivalent to
if ($arg instanceof Foo) {
echo "Yes";
}
// Equivalent to
if (is_a($arg, 'Foo')) {
echo "Yes";
}
?>
以上例程的输出类似于：
Yes Yes Yes