Selecting a random element from a PHP associative array

Question

I've got an associative array in PHP and want to select a random key/value pair out of it. Here's what I have so far:

Initialize.

$locations = array();

Loops through a SQL query and adds key/val pairs:

array_push($locations, "'$location_id' => '$location_name'");

Later on, I select a random index of the array:

$rand = array_rand($locations);

Rand is just a number. So locations[$rand] gives me something like:

'1' => 'Location 1'

OK great, an assoc array element. At this point, I do not know the key of this assoc array, so I've tried the following things:

foreach($locations[$rand] as $loc_id => $location_name) { 
    echo "$key : $value<br/>\n";
}

$loc_id, $location_name = each($locations[$rand]);

$location_name = $locations[key($rand)];

None of these 3 attempts work. They all throw errors like "Passed variable is not an array".

I'm sure there's some simple 1 liner that can pluck a random key/value pair from the array. Or my syntax is off. I'd really appreciate the help.

Answer 1

$array = array('a' => 1, 'b' => 2);
$key = array_rand($array);
$value = $array[$key];

Your problem is in array_push($locations, "'$location_id' => '$location_name'");. Do this instead: $locations[$location_id] = $location_name;. Then array_rand($location) will return a random $location_id; and you can get the name with $name = $locations[$location_id].