I have the following code in production that appears to be causing an infinite loop.
$z=1;
while (!$apns = $this->getApns($streamContext) && $z < 11)
{
myerror_log("unable to conncect to apple. sleep for 2 seconds and try again");
$z++;
sleep(2);
}
How are the precedence rules getting applied that cause this behavior?
http://php.net/manual/en/language.operators.precedence.php
I see this note in the docs:
Although = has a lower precedence than most other operators, PHP will still allow expressions similar to the following: if (!$a = foo()), in which case the return value of foo() is put into $a.
Which makes me think the the = should be evaluated first. then the ! then the &&, which would not cause an infinite loop.