Checking Multiple $_GET variables if equals a string - php

Question

if(isset($_GET['a']) || isset($_GET['b']) || isset($_GET['c'])){
if(($_GET['a'] || $_GET['b'] || $_GET['c']) == "x"){
echo "YES";
} else {
echo "NO";
}
}
in this php code, i'm trying to check if one of those requests isset and if one of them value == 'x' or not, But the 2nd part if(($_GET['a'] || $_GET['b'] || $_GET['c']) == "x") doesn't work as intended at all, I wrapped it inside () hoping it would work, In this condition, do i have to separate it as i did inthe isset() part? or is there a better method to do that?

Answer 1

This is likely what you are looking for
UPDATE - I just changed || to && for the last condition in case you were quick to try it out.
if( (isset($_GET['a']) && $_GET['a'] == "x") || (isset($_GET['b']) && $_GET['b'] == "x") || (isset($_GET['c']) && $_GET['c'] == "x")){
echo "YES";
} else {
echo "NO";
}

Answer 2

If you have to write a lot of conditionals you could use one of the following:
Using a foreach and a conditional:
$either_abc_is_x = function() {
$keys = ['a','b','c'];
foreach($keys as $key)
if(isset($_GET[$key]) && $_GET[$key] == "x")
return true;
return false;
};
echo $either_abc_is_x() ? 'YES' : 'NO';
Using a an array filter with a conditional:
$get_abc_keys_equal_to_x = array_filter(['a','b','c'], function($v) {
return isset($_GET[$v]) && $_GET[$v] == 'x';
});
echo $get_abc_keys_equal_to_x ? 'YES' : 'NO';
Array gymnastics:
$either_abc_is_x = isset($_GET) && in_array('x', array_intersect_key($_GET, array_flip(['a','b','c'])));
echo $either_abc_is_x ? 'YES' : 'NO';