test.php

function getLongestSequence($arr){ 
    $output =0; 
    $size =1; 
    $character = ''; 
    foreach($arr as $char){
        if ( $char == $character ){ 
            $size++; 
        } 
        else { 
            if ( $size >= $output){ 
                $output = $size; 
                $character = $char; 
            } 
            $size =1; 
        }
    } 
    return $output; 
}