CODEWITHSUNDEEP
php
zojwek
zojwek

Reputation: 131

Assert is returning true no matter the condition

For example, if I have 

assert('2<1');

It turns out that the assertion returns as true. I also copy pasted Example #2 from http://php.net/manual/en/function.assert.php and it also evaluated every single assertion as true, when that's clearly not the case. Any idea what might be causing this?

Edit - 

<?php
    var_dump(assert('2<1'));
?>

Output is 

true

If i run this at http://sandbox.onlinephpfunctions.com/, the assertion fails as expected. Yet this does not happen on my test server.

Edit #2 - PHP Version:

PHP 7.0.9-1+deb.sury.org~trusty+1 (cli) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
with Zend OPcache v7.0.9-1+deb.sury.org~trusty+1, Copyright (c) 1999-2016, by Zend Technologies

Upvotes: 5

Views: 705

Answers (1)

Jonnix
Jonnix

Reputation: 4187

Assert's have 3 settings:

(exert from php.ini):

-1: Do not compile at all
0: Jump over assertion at run-time
1: Execute assertions
...
http://php.net/zend.assertions

-1 being "production", 1 being development and zero being an odd middle-ground that appears to act like production.

Apparently when in non-development mode this means that assert will always return true, effectively bypassing the check.

Upvotes: 5

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