Checking Multiple $_GET variables if equals a string

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?

mseifert · Accepted Answer · 2017-09-11 00:46:53Z

3

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";
}

answered Sep 11, 2017 at 0:46

mseifert

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2 Comments

AXAI Over a year ago

so this wrapping part ($_GET['a'] || $_GET['b'] || $_GET['c']) == "x" doesn't work as a collector for all variables as condition?

mseifert Over a year ago

($_GET['a'] || $_GET['b'] || $_GET['c']) is saying: $_GET['a'] is TRUE or $_GET['b'] is TRUE or $_GET['c'] is TRUE. After evaluating this, you will have either TRUE if one of these is TRUE or FALSE if not. Then it compares whether this TRUE or FALSE value is equal to x. This is not what you wanted.

Progrock · Accepted Answer · 2017-09-11 06:53:28Z

0

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';

edited Sep 11, 2017 at 6:53

answered Sep 11, 2017 at 5:39

Progrock

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