< ?php
$array = array("hi", "hi", "dog");
print_r(array_count_values($array));
?>

Array
(
    [hi] => 2
    [dog] => 1
)

<?php
$array = array(  1 , "cat", "fish", "dog" , "cow" , 1 ,"cow" );
print_r(array_count_values($array));
?>

Array
(
    [1] => 2
    [cat] => 1
    [fish] => 1
    [dog] => 1
    [cow] => 2
)

<?php
$value = array (
array ( 1 => 0, 2 => '2009-06-09,10', 3 => '2009-06-09,11' ),
array ( 1 => 0, 2 => '2009-06-09,10', 3 => '2009-06-09,11' ),
array ( 1 => 0, 2 => '2009-06-09,11', ),
array ( 1 => 0, 2 => '2009-06-09,10', 3 => '2009-06-09,11' )
);
//+ ทำให้เป็น array 1 มิติเสียก่อน
foreach( $value as $value ):
 
	$im_value[] = implode('|',$value );
 
endforeach;
 
$string = implode('|',$im_value);
 
$odi_array = explode('|',$string);
//- ทำให้เป็น array 1 มิติเสียก่อน
 
print_r( array_count_values($odi_array) )
?>

Array
(
    [0] => 4
    [2009-06-09,10] => 3
    [2009-06-09,11] => 4
)