<?php
function count_array_values($my_array, $match) 
{ 
    $count = 0; 
    
    foreach ($my_array as $key => $value) 
    { 
        if ($value == $match) 
        { 
            $count++; 
        } 
    } 
    
    return $count; 
} 

$colors = array("c1"=>"Red", "c2"=>"Green", "c3"=>"Yellow", "c4"=>"Red");

echo "\n"."Red color appears ".count_array_values($colors, "Red"). " time(s)."."\n"; 
?>