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  <head>
   <title> array_count_values.php </title>
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 <?php
 $a=array("A","Cat","Dog","A","Dog");
 $c=array_count_values($a);
 var_dump($c);
 ?>
  </body>
 </html>

array
   'A' => int2
   'Cat' => int1
   'Dog' => int2