Shoutbox

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Originally posted by John Anderton

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Originally posted by matty

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Originally posted by vikke
Mattike: == is the equal operator, not ===.

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=== Is the bitwise-equal operator.

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Also used to type specificity.
vikke, in php if you evaluate 0==false, the value would be true. Because its not testing the type of operands stored. doing 0===false would make it test the type as well which as matty correctly pointed out, is done by checking equality bitwise

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Oh I'm sorry, I don't know scripting too well, I'm used to C where == is the bitwise-equal operator.

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Originally posted by Stigmata
I normally use (!$variable)?

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Why are we talking about PHP in a JScript thread?

Anyway, these are equivalent with one major difference...

if(!$variable) { }

if(empty($variable)) { }

If $variable has not been set, the first will generate a warning message (which you'll only see if your error_reporting level includes E_NOTICE).

PHP Notice: Undefined variable: variable

So if you're sure a variable has been set, just use !$variable. If not, use empty().

Note: empty() is just a shorter way of doing this...

if(!isset($variable) || !$variable) { }