Question: $states = array("Ohio", "Iowa", "Arizona", "Iowa", "Ohio");
$stateFrequency = array_count_values($states);
print_r($stateFrequency);
This returns the following:
AArray ( [Ohio] => 2 [Iowa] => 2 [Arizona] => 2 )
BArray ( [Ohio] => 2 [Iowa] => 2 [Arizona] => 1 )
CArray ( [Ohio] => 2 [Iowa] => 1 [Arizona] => 1 )
DArray ( [Ohio] => 2 [Iowa] => 1 [Arizona] => 2 )
Note: Not available