如何过滤数组中数据串最相同的值？ [重复]

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i have an array like this:

$track = array(
         "yellow", 
         "red",
         "black", 
         "black", 
         "yellow", 
         "black"
 );

how to print most same value in array php like:

  1. "the most data is 'black' with count 3 ,"
  2. "the second most data is 'yellow' with count 2 ,"
  3. "the third most data is 'red' with count 1 ,"
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