Re: [PHP-DEV] is_a() vs. instanceof

[Sean Coates]

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
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