On Thu, Aug 26, 2010 at 2:11 PM, Hector Virgen <[email protected]> wrote:
> PHP is a loosely-typed language, meaning that the empty string '' will
> evaluate to false unless you do strict comparisons (=== and !==). For
> example:
>
> $test = FALSE;
>
> if ('' != $test) {
> // this executes because of loose typing
> }
>
> if ('' !== $test) {
> // this doesn't execute because of strict comparison
> }
>
> When testing function return values that may return a number or FALSE, it
> is best to use strict comparisons:
>
> while(false !== ($attribute = $result->fetch_assoc())) {
> ...
> }
>
> --
> **
>
As I understand it, one reason for putting the literal on the left side of a
comparison test is to safeguard against introducing a typo/bug when you
mistakenly type '=' instead of '==' or '==='
if ($foo = 346) {
}
which in fact is an idiom some of us are fond of, i.,e assigning values
inside conditionals
if ($foo = $this->_getParam('something_verbose')) {
// work with $foo
}
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http://davidmintz.org/
