each
Return the current key and value pair from an array and advance
the array cursor
Descriptionarrayeacharray&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;.
<function>each</function> examples
]]>
$bar now contains the following key/value
pairs:
bob
[value] => bob
[0] => 0
[key] => 0
)
]]>
"Bob", "Seppo" => "Sepi");
$bar = each($foo);
print_r($bar);
?>
]]>
$bar now contains the following key/value
pairs:
Bob
[value] => Bob
[0] => Robert
[key] => Robert
)
]]>
each is typically used in conjunction with
list to traverse an array, here's an
example:
Traversing an array with <function>each</function>
'apple', 'b' => 'banana', 'c' => 'cranberry');
reset($fruit);
while (list($key, $val) = each($fruit)) {
echo "$key => $val\n";
}
?>
]]>
Outputs:
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.