PHP: Weird "or" Operator Behavior

Question

PHP

I always thought that the "||" operators and "or" in php work the same way.
Judging by the documentation , they really should work the same, except for priorities.
However
$x = 0 || 1
and
$x = 0 or 1
actually work differently.

Code: This code outputs: Can anyone explain this behaviour?
<?php
function foo(){
print "foo";
return 0;
}

function bar(){
print "bar";
return 1;
}

$x = foo() or bar();
var_dump($x);


foobarint(0)

Answer 1

Yes, they work the same, except for the priorities. For the or operator, it is so low that it is even lower than for the assignment operator.

Answer 2

The author has never met such a construction, which is lying around in all sorts of FAQs at every step:

$handle = mysql_connect() or die(mysql_error());

I think it's clear that in this case it's not the result of the logical OR that needs to be put in $handle, but the connection error should be handled.

Answer 3

Recently, a question was considered on Habré - the comma operator . Here, among other things, the answer to your question is stated.

Answer 4

Certainly. In the case of OR, the second operand is not evaluated if the first is TRUE. Same with AND.

Answer 5

$x = (foo() or bar());

Answer 6

Read and sign.