Why string date is equal to 0

Question

I just wondering below code ! I had never seen and heard before .Why string date is equal to 0 ? Is there any documentation for that..

<?php
$p = "date";
$n = 0;
$m = 1;
var_dump($p == $n);//true
var_dump($p == $m);//false
var_dump($n == $m);//false
?>

use === to get false in the first case. And read about comparing in php — splash58, Jun 01 '16 at 08:57
For future reference : http://stackoverflow.com/questions/80646/how-do-the-php-equality-double-equals-and-identity-triple-equals-comp/80649#80649 — CD001, Jun 01 '16 at 09:02
Yes there is documentation: [Read](http://nl1.php.net/manual/en/language.types.type-juggling.php) and [Learn](http://nl1.php.net/manual/en/language.types.integer.php#language.types.integer.casting) — Mark Baker, Jun 01 '16 at 09:04

score 0 · Answer 1 · answered Jun 01 '16 at 09:01

0

Yes, you compare string with int so string is converted to int first. int from "date" string is 0

answered Jun 01 '16 at 09:01

nospor

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score 0 · Answer 2 · edited Jun 01 '16 at 09:19

0

That's how it works:

Reference : Manual [See the table]

Loose comparisons with ==
"PHP" == 0 is true
"PHP" == 1 is false

Strict comparisons with ===
"PHP" === 0 is false
"PHP" === 1 is false

So is your case with "date"

edited Jun 01 '16 at 09:19

Vijay Dohare

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answered Jun 01 '16 at 09:03

Thamilhan

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score 0 · Answer 3 · answered Jun 01 '16 at 09:06

0

See this

you have used ==

0 is an int, so in this case it is going to convert 'date' into int. Which is not parseable as one, and will become 0. that is why you are getting true. try === opertor

answered Jun 01 '16 at 09:06

Passionate Coder

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Why string date is equal to 0

3 Answers3