each
(PHP 4, PHP 5)
each — Return the current key and value pair from an array and advance the array cursor
Description
array each
( array &$array
)
After each() has executed, the array cursor
will be left on the next element of the array, or past the last
element if it hits the end of the array. You have to use
reset() if you want to traverse the array
again using each.
Parameters
-
array
-
The input array.
Return Values
Returns the current key and value pair from the array
array
. 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.
Examples
Example #1 each() examples
<?php
$foo = array("bob", "fred", "jussi", "jouni", "egon", "marliese");
$bar = each($foo);
print_r($bar);
?>
$bar now contains the following key/value
pairs:
Array
(
[1] => bob
[value] => bob
[0] => 0
[key] => 0
)
each() is typically used in conjunction with
list() to traverse an array, here's an
example:
Example #2 Traversing an array with each()
<?php
$fruit = array('a' => 'apple', 'b' => 'banana', 'c' => 'cranberry');
reset($fruit);
while (list($key, $val) = each($fruit)) {
echo "$key => $val\n";
}
?>
The above example will output:
a => apple
b => banana
c => cranberry
Caution
Because assigning an array to another variable resets the original
arrays pointer, our example above would cause an endless loop had we
assigned $fruit to another variable inside the
loop.
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