note 123633 added to function.is-numeric
| From: | sandreas@php.net | Date: | Thu, 21 Feb 2019 10:48:50 +0000 |
| Subject: | note 123633 added to function.is-numeric | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-210272@lists.php.net to get a copy of this message | ||
Note that strings with leading zeros containing only digits also return true on check with
is_numeric, although they might be not a valid number. Example:
<?php
$x = 009; // this is invalid php code, 009 is not octal
$y = 007; // this is valid php code, 007 is octal
$z = 01.12; // this also is valid php code
var_dump(is_numeric("009")); // outputs true
var_dump(is_numeric("007")); // outputs true
var_dump(is_numeric("00.12")); // outputs true
?>
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Server IP: 208.43.231.9
Probable Submitter: 185.85.3.142 (proxied: 212.65.13.82)
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Manual Page -- http://php.net/manual/en/function.is-numeric.php
Edit -- https://master.php.net/note/edit/123633
Del: integrated -- https://master.php.net/note/delete/123633/integrated
Del: useless -- https://master.php.net/note/delete/123633/useless
Del: bad code -- https://master.php.net/note/delete/123633/bad+code
Del: spam -- https://master.php.net/note/delete/123633/spam
Del: non-english -- https://master.php.net/note/delete/123633/non-english
Del: in docs -- https://master.php.net/note/delete/123633/in+docs
Del: other reasons-- https://master.php.net/note/delete/123633
Reject -- https://master.php.net/note/reject/123633
Search -- https://master.php.net/manage/user-notes.php