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each

(PHP3 , PHP4 )

each --  Return the next key and value pair from an array

Description

array each (array array)

Returns the current key and value pair from the array array and advances the array cursor. This pair is returned in a four-element array, with the keys 0, 1, key, and value. Elements 0 and key contain the key name of the array element, and 1 and value contain the data.

If the internal pointer for the array points past the end of the array contents, each() returns false.

Example 1. Each() examples


$foo = array ("bob", "fred", "jussi", "jouni", "egon", "marliese");
$bar = each ($foo);

$bar now contains the following key/value pairs:

  • 0 => 0
  • 1 => 'bob'
  • key => 0
  • value => 'bob'

$foo = array ("Robert" => "Bob", "Seppo" => "Sepi");
$bar = each ($foo);

$bar now contains the following key/value pairs:

  • 0 => 'Robert'
  • 1 => 'Bob'
  • key => 'Robert'
  • value => 'Bob'

Each() is typically used in conjunction with list() to traverse an array; for instance, $HTTP_POST_VARS:

Example 2. Traversing $HTTP_POST_VARS with each() 


echo "Values submitted via POST method:<br>";
reset ($HTTP_POST_VARS);
while (list ($key, $val) = each ($HTTP_POST_VARS)) {
    echo "$key => $val<br>";
}

After each() has executed, the array cursor will be left on the next element of the array, or on the last element if it hits the end of the array.

See also key(), list(), current(), reset(), next(), and prev().

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