- var_dump: documentation ( source)
<?php
class Foo {
public function test( self $arg = null ){
var_dump( is_null( $arg ) ) . "\n";
var_dump( $arg instanceof Foo ) . "\n";
var_dump( get_class( $arg ) ) . "\n";
var_dump( get_class( null ) ) . "\n";
}
}
$foo = new Foo();
$foo->test();