PHP counts the number of different elements in an array

php counts the number of array elements

count(): Counts the number of elements in the array; (recommended learning ：PHP Programming from Beginner to Master)

sizeof(): has the same purpose as count(). Both functions can return the number of array elements. You can get the number of elements in a regular scalar variable. If the array passed to this function is an empty array, or a variable that has not been set, the number of array elements returned is 0;

array_count_value(): Count the number of times each specific value appears in the array $array

For example:

$array=array(4,5,1,2,3,1,2,1);
$ac=array_count_value($array);

will be created An array named $ac, which includes:

 关键字     值
   4          1
     5          1
     1          3
     2          2
     3          1

For example:

<?php
$a=array("Cat","Dog","Horse","Dog");
print_r(array_count_values($a));
?>

Output:

Array ( [Cat] => 1 [Dog] => 2 [Horse] => 1 )

The above is the detailed content of PHP counts the number of different elements in an array. For more information, please follow other related articles on the PHP Chinese website!