PHP - toggle state

If the result is allowed to be a boolean (and it does not have to be an integer swap) you can use the negation operator:

<?php
$state = 0;
var_dump(!$state);

$state = 1;
var_dump(!$state);

Output:

bool(true) 
bool(false)

You can do:

$state = 1 - $state;

Try this code : $state = !$state

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