note 33727 added to function.is-int
| From: | phpguru at gmx dot ch | Date: | Sat, 05 Jul 2003 13:50:17 +0000 |
| Subject: | note 33727 added to function.is-int | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-51551@lists.php.net to get a copy of this message | ||
To Logan:
There's also a simple non-regexp way to convert a (form) value into an integer if it consists
of numbers only - although with a trap (see below):
if ($_POST["number"] == (int)$_POST["number"]) $_POST["number"] =
(int)$_POST["number"];
The "traps" (or "side effects") appear with values like "" (empty
string) and false (boolean), which are converted to 0 (integer). But in certain cases this might be
desirable or/and usefull ;-)
Solutions like
if (($_POST["number"] + 1 - 1) == $_POST["number"]) ...
falls into the same category.
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Manual Page -- http://www.php.net/manual/en/function.is-int.php
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