Are these two expressions equivalent? If they are, can you explain why? (I am a java programmer):
if(!$someObject)
if($someObject!==null)
Thanks
Are these two expressions equivalent? If they are, can you explain why? (I am
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Are these two expressions equivalent? If they are, can you explain why? (I am a java programmer):
if(!$someObject)
if($someObject!==null)
Thanks
You can have a look a the type comparisons table on php.net
Plus in your case, if
$someObject = true, thenif($someObject!==null)works butif(!$someObject)won’t.In PHP you have the two different type of comparison, the loose one (
==,!=) and the strict one (===,!==).ifworks with a loose comparison.The second
ifyou use will basically work with strict comparison, so the two of them can’t be equivalent.The only way to have a real equivalent is to work with the same comparison “type” within the two if.
if(!$someObject)is equivalent toif($someObject == false)only.