array_count_values:返回数组中所有值出现的次数

$arr1 = ['a','b','c','d','e','e','a','a'];

$arr = array_count_values($arr1);

 

echo '<pre>';

print_r($arr);

 

result:

Array

(

    [a] => 3

    [b] => 1

    [c] => 1

    [d] => 1

    [e] => 2

)