the 3"===" rather than 2 "=="
If i use 3 === rather than 2 == am i checking its boolean state as well as its value.
If this is true whenever i check a boolean state for instance if something is false should i do this:
if($boolean === FALSE)
does that make if($boolean == FALSE) incorrect and could result in the wrong result?
pr0gr4mm3r posted this at 16:39 — 29th October 2008.
He has: 1,502 posts
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You are correct in saying === checks the type and == does not. This only means that if you do ($var == FALSE), the $var can be FALSE, 0, null, or empty string. With ($var === FALSE), $var can be only FALSE.
I hardly ever use === unless I need to test a function that might return either 0 or FALSE. strpos() is one of them.
Here are some references on php.net that further explains this:
http://us2.php.net/manual/en/language.types.boolean.php
http://us2.php.net/manual/en/language.operators.comparison.php
decibel.places posted this at 17:14 — 29th October 2008.
He has: 1,494 posts
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I saw some code on DZone that used
!==FALSEand wondered if that is the proper syntax..pr0gr4mm3r posted this at 17:17 — 29th October 2008.
He has: 1,502 posts
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Yup, !== is the opposite of === just as != is the opposite of ==.
teammatt3 posted this at 17:56 — 29th October 2008.
He has: 2,102 posts
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I wonder why the designers of these languages say == is the equality operator and != is the negation of that. != should be the negation of assignment, and !== should be the negation of equality.
It's soooo confusing
decibel.places posted this at 18:15 — 29th October 2008.
He has: 1,494 posts
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How about REFERER in PHP vs referrer in JavaScript?
and
var myCars = new Array("Saab","Volvo","BMW") (JavaScript (semi-colon optional))
vs
var $myCars = array("Saab","Volvo","BMW"); (PHP)
pr0gr4mm3r posted this at 19:50 — 29th October 2008.
He has: 1,502 posts
Joined: Sep 2006
Probably because there is not negative to the assignment operator - you can't unassign something
. I look at it as replacing one of the = with a ! for the not. It helps me remember it that way.
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