note 92666 deleted from language.types.null by danbrown

Note Submitter: anton dot clarke at variantfuture dot co ---- As the documentation does not mention it and just in case you were wondering: <?php $a = null; $b = NULL; if(is_null($a)) echo 'is_null() is true where $a=null<br/>'; if($a===null) echo '$a IS EXACTLY null <br/>'; if($a===NULL) echo '$a IS EXACTLY NULL <br/>'; if(null === NULL) echo 'null === NULL<br/>'; if(null == NULL) echo 'null == NULL<br/>'; if($a === $b) echo '$a === $b<br/>'; if($a == $b) echo '$a == $b<br/>'; ?> as expected produces the following in 5.2.9. is_null() is true where $a=null IS EXACTLY null IS EXACTLY NULL null === NULL null == NULL $a === $b $a == $b Obvious really, but worth checking when you consider the potential issues. Also by the same type of test: true === TRUE and false === FALSE.