Re: [PHP-DEV] Comparison style From: Sterling Hughes (sterling <email protected>)
Date: 05/14/01

Jon Parise wrote:

> I was just perusing some of the PEAR code, and a certain
> condition caught my eye:
>
> if ("" == $content)
>
> My habit has always been to write that sort of condition using
> the style:
>
> if ($content == "")
>
> (leaving the unknown value on the left side of the comparison
> operator)
>
> Is one of these styles preferable to the other, either always or
> in certain instances?
>
>

It depends on your personal style. The reason for testing like:

if ("" == $content)

Is because, if you're careless enough to have only one '=' sign:

if ("" = $content)

The code will not fail silently, but rather emit and error, whereas:

if ($content = "")

Will fail silently, and might therefore cause debugging headaches later on.

-Sterling 

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