NYCPHP Meetup

[Nunez, Eddy]

Well that sure is interesting.
Anyone with intimate knowledge of PHP internals care to answer this one?


-----Original Message-----
From: talk-bounces at lists.nyphp.org
[mailto:talk-bounces at lists.nyphp.org]On Behalf Of Brian Kaney
Sent: Friday, July 02, 2004 11:19 AM
To: NYPHP Talk
Subject: [nycphp-talk] What's going on here? PHP conditional.


Just came across this problem.  Consider the following code:

<?php

echo "Equivalent: ";
if (0 == 'Some String') { echo 'evaluates true'; } else { echo
'evaluates false'; }

echo "\n";

echo "Equivalent and same type: ";
if (0 === 'Some String') { echo 'evaluates true'; } else { echo
'evaluates false'; }

?>

I get 

Equivalent: evaluates true
Equivalent and same type: evaluates false



Does anyone know why (0 == 'string') evaluates to true?   

According to the manual, the integer 0 converts to FALSE.  A non-empty
(or non-zero) string is considered TRUE. I would think if (FALSE ==
TRUE) should be evaluated as false?

http://us2.php.net/manual/en/language.types.boolean.php#language.types.boole
an.casting


- Brian


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