How To Search Key In Array And Return Its Value Using PHP?

You can get corresponding value associated with array key by using simple function as below.

function get_value_by_key($array,$key)
{
 foreach($array as $k => $each)
 {
   if($k == $key)
   {
     return $each;
   }
  
   if(is_array($each))
   {
     if($return = get_value_by_key($each,$key))
     {
       return $return;
     }
   }
  
  }
 
}

//creating array
$array = array
(
    '124' => 'Morning',
    '134' => 'Evening',
    '135' => 'Night'    
);

echo get_value_by_key($array,'124'); // outputs: Morning
echo get_value_by_key($array,'135'); // outputs: Night

This function loops through all the keys of an array and return the value associated with assigned variable $key.
Ref: http://stackoverflow.com/a/4467135