I'm having a parse error when I upload this code on my server (php 5.5.12):
if (!empty($a = $b)) {...}
The error is :
syntax error, unexpected '=', expecting ')'
I don't have any problem with the same code on MAMP (php 5.5.10). Of course I can easily solve it with this code:
$a = $b;
if (!empty($a)) {...}
But well, the first one should work.
Thank you!
EDIT : I works. I just had a problem with my PHP version.
From the empty() docs:
Note: Prior to PHP 5.5,
empty()only supports variables; anything else will result in a parse error. In other words, the following will not work:empty(trim($name)). Instead, usetrim($name) == false.
5.5.0 empty() now supports expressions, rather than only variables.
you can't put a variable assignment inside empty... as a shot in the dark, i guess you mean to do a comparison between $a and $b... in which case try using == or === to compare type also.
EDIT prior to PHP5.5 you will have to assign the comparison to a variable:
$expr = $a == $b;
if (!empty($expr)) {...}
HOWEVER, i'm not really sure why you need to use empty here... could just do
if (FALSE !== ($a == $b)) {...}
It's work fine, you can check into next url
http://sandbox.onlinephpfunctions.com/code/7ee2afa5c3dddc283b69ee9d510695acf7deb451
Maybe your server have some bad settings. Make sure you have the full version 5.5.12
Well, I didn't reboot my server after updating php to 5.5.x. My bad.
But it works!
Thank you!
The PHP function empty() simply checks to see if a variable is both set (isset() and is not not NULL (!is_null()). In PHP versions older than 5.5, you cannot evaluate an expression inside it.
Edit:
Removed the code snippets because they were a little confusing. The second snippet in the original question is correct. The bit above should explain why.
