Understanding operator precedence in php

Question

I have the following code in production that appears to be causing an infinite loop.

 $z=1;
 while (!$apns = $this->getApns($streamContext) && $z          


        

Answer 1

Your code is clear example of why it's good habit to always put all the conditions in brackets (and the same applies to code block. Even oneliners should be surrounded by { and }). So instead of error-prone:

while (!$apns = $this->getApns($streamContext) && $z < 11)

do

while (!($apns = $this->getApns($streamContext)) && ($z < 11))

and you will be safe.