如何在多维数组中搜索文本或数字

Question

I am try to create a condition where condition should check the presence of locality or zip code in Multidimensional array, if any one condition is satisfied, its should return true or else false

here is the code i tried with a array

$cars = array("locationabc","locationdef","locationdghi");
$locality = "locationabc";
if ( in_array($locality, $cars) ) {
    echo "you can proceed service to your location";
    }else {
            echo "sorry we don't provide service to your location";
        }

but how to do that in multidimensional array, i don''t know whether the below condition is right or wrong

$cars = array
  (
  array("locationabc",500001),
  array("locationdef",500002),
  array("locationdghi",500003)
  );
$locality = "locationabc";

  if ( array_key_exists($locality, $cars) ) {
                echo "you can proceed service to your location";
            }else {
            echo "sorry we don't provide service to your location";
        }

Answer 1

You can use following example to check whether value exist or not-

$flag = 0;
  foreach($cars as $c)
  {
      if(in_array($locality,$c))
      {
          $flag = 1;
          break;
      }

  }

if($flag == 1)
    echo 'value exist';
else
    echo 'value does not exist';