How to count the elements of an array in PHP

This article mainly introduces the PHP statistics array elements of the method of the relevant data, the need for friends can refer to the

COUNT (): counts the number of elements in an array;

sizeof (): and Count () has the same purpose, both functions can return the number of elements in an array. You can get the number of elements in a regular scalar quantity, if the array passed to the function is an empty array, or a variable that is not set, the number of elements returned is 0;

Array_count_value (): Counts the number of times each particular value appears in the array $array;

Such as:

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

$ac =array_count_value ($array);

An array named $ac is created, which includes:

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11 Keyword values

4 1

5 1

1 3

2 2

3 1

Send a Netizen's idea, also very good

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14$arr = Array (

' 1011,1003,1008,1001,1000,1004,1012 ',

' 1009 ',

' 1011,1003,1111 '

);

$result = Array ();

foreach ($arr as $str) {

$str _arr = Explode (', ', $str);

foreach ($str _arr as $v) {

$result [$v] = Isset ($result [$v])? $result [$v]: 0;

$result [$v] = $result [$v] + 1;

}

}

Print_r ($result);

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