Several ways to get the length of an array in php_PHP tutorial

It is very simple to get the length of an array in PHP. PHP provides us with two functions to calculate the length of a one-dimensional array, such as count and sizeof, which can directly count the length of the array. Let's take a look at a few examples.

How to get the length of an array in php, use php function count(), or sizeof()

For example:

echo sizeof($arr);

The code is as follows

代码如下	复制代码
$arr = Array('0','1','2','3','4'); echo count($arr); // 输出 5   $arr = array('A','B','C'); echo sizeof($arr); //输出3

Copy code

$arr = Array('0','1','2','3','4');

echo count($arr);

// Output 5

$arr = array('A','B','C');

//Output 3

sizeof() and count() have the same purpose. 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 For a variable that has not been set, the number of array elements returned is 0; The functions of the two functions are the same. According to the manual, sizeof() is an alias of the function count(). So how to count the length of multi-dimensional arrays? You can refer to: http://www.bKjia.c0m/phper/21/32805.htm

http://www.bkjia.com/PHPjc/632682.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632682.htmlTechArticleIt is very simple to get the length of an array in PHP. PHP provides us with two functions to calculate the length of a one-dimensional array. , such as count and sizeof, can directly count the array length. Let’s take a look...