Re: is_a() vs. instanceof

Dan Ostrowski wrote:

On Tuesday 10 August 2004 7:36 pm, Hans Lellelid wrote:

The class must be loaded in order to perform an instanceof check! *snip*

Am I misunderstanding you?

consider the following: <?php class Foo {} $foo = unserialize('O:3:"Foo":0:{}'); echo '$foo is_a Foo? '. (is_a($foo, 'Foo') ? 'yes' : 'no') ."\n"; echo '$foo instanceof Foo? '. ($foo instanceof Foo ? 'yes' : 'no') ."\n"; ?> outputs: $foo is_a Foo? yes $foo instanceof Foo? yes and <?php //class Foo {} $foo = unserialize('O:3:"Foo":0:{}'); echo '$foo is_a Foo? '. (is_a($foo, 'Foo') ? 'yes' : 'no') ."\n"; echo '$foo instanceof Foo? '. ($foo instanceof Foo ? 'yes' : 'no') ."\n"; ?> outputs: $foo is_a Foo? no Fatal error: Class 'Foo' not found in /home/sean/phpdoc/scripts/tmp/is_a.php on line 8 --- I realize that is_a is deprecated, but it's more convenient in this situation. S