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How to count the number of array elements in PHP_PHP Tutorial
- WBOYOriginal
- 2016-07-13 09:47:30961browse
How to count the number of array elements in php
This article mainly introduces the relevant information on the method of counting the number of array elements in php. Friends who need it can refer to it
Count(): Count the number of elements in the array;
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(): Counts the number of times each specific value appears in the array $array;
For example:
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2$array=array(4,5,1,2,3,1,2,1);
$ac=array_count_value($array);
An array named $ac will be created, which includes:
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11 Keyword Value
4 1
5 1
1 3
2 2
3 1
It’s also very good to post a netizen’s idea
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14$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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