Php array function sequence-each ()-get the key of the element pointed to by the current internal pointer of the array

The each () function generates an array consisting of the key and key values of the elements pointed to by the current internal pointer of the array, and moves the internal pointer forward. The returned array contains four elements: key name 0, 1, key, and value. Unit 0 and key contain the key name of the array unit, 1 and each () definition and usage
The each () function generates an array consisting of the key and key values of the elements pointed to by the current internal pointer of the array, and moves the internal pointer forward.

The returned array contains four elements: key name 0, 1, key, and value. Unit 0 and key contain the key name of the array unit, and 1 and value contain data.

If the internal pointer is out of the array range, this function returns FALSE.

Syntax
Each (array) parameter description
Array is required. Specifies the array to be used.

Example 1
Copy codeThe code is as follows:
$ People = array ("Peter", "Joe", "Glenn", "Cleveland ");
Print_r (each ($ people ));
?>

Output:

Array ([1] => Peter [value] => Peter [0] => 0 [key] => 0) Example 2
Each () is often used in combination with list () to traverse arrays. This example is similar to the previous example, but the entire array is output cyclically:
Copy codeThe code is as follows:
$ People = array ("Peter", "Joe", "Glenn", "Cleveland ");
Reset ($ people );
While (list ($ key, $ val) = each ($ people ))
{
Echo "$ key => $ val
";
}
?>

Output:

0 => Peter
1 => Joe
2 => Glenn
3 => Cleveland example
Because the original array pointer is reset when an array is assigned to another array, in the above example, if $ people is assigned to another variable within the loop, it will lead to an infinite loop.