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each
Return the current key and value pair from an array and advance the array cursor
(PHP 4, PHP 5)
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 302. 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
)
<?php
$foo = array("Robert" => "Bob", "Seppo" => "Sepi");
$bar = each($foo);
print_r($bar);
?>
$bar now contains the following key/value
pairs:
Array
(
[1] => Bob
[value] => Bob
[0] => Robert
[key] => Robert
)each() is typically used in conjunction with list() to traverse an array, here's an example:
Example 303. 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
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.
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.
See also key(), list(), current(), reset(), next(), prev(), and foreach.