note 73992 modified in function.array-keys by danbrown
| From: | danbrown@php.net | Date: | Wed, 25 Aug 2010 01:47:03 +0000 |
| Subject: | note 73992 modified in function.array-keys by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-172005@lists.php.net to get a copy of this message | ||
This function will extract keys from a multidimensional array
<?php
function multiarray_keys($ar) {
foreach($ar as $k => $v) {
$keys[] = $k;
if (is_array($ar[$k]))
$keys = array_merge($keys, multiarray_keys($ar[$k]));
}
return $keys;
}
?>
Example code:
<?php
$array = array("color" => array("1stcolor" => "blue",
"2ndcolor" => "red", "3rdcolor" => "green"),
"size" => array("small", "medium",
"large"));
echo "<pre>";
print_r($array);
echo "</pre>";
echo "<pre>";
print_r(multiarray_keys($array));
echo "</pre>";
?>
Example output:
Array
(
[color] => Array
(
[1stcolor] => blue
[2ndcolor] => red
[3rdcolor] => green
)
[size] => Array
(
[0] => small
[1] => medium
[2] => large
)
)
Array
(
[0] => color
[1] => 1stcolor
[2] => 2ndcolor
[3] => 3rdcolor
[4] => size
[5] => 0
[6] => 1
[7] => 2
)
--was--
# This function will extract keys from a multidimensional array
function multiarray_keys($ar) {
foreach($ar as $k => $v) {
$keys[] = $k;
if (is_array($ar[$k]))
$keys = array_merge($keys, multiarray_keys($ar[$k]));
}
return $keys;
}
# Example code:
$array = array("color" => array("1stcolor" => "blue",
"2ndcolor" => "red", "3rdcolor" => "green"),
"size" => array("small", "medium",
"large"));
echo "<pre>";
print_r($array);
echo "</pre>";
echo "<pre>";
print_r(multiarray_keys($array));
echo "</pre>";
# Example output:
Array
(
[color] => Array
(
[1stcolor] => blue
[2ndcolor] => red
[3rdcolor] => green
)
[size] => Array
(
[0] => small
[1] => medium
[2] => large
)
)
Array
(
[0] => color
[1] => 1stcolor
[2] => 2ndcolor
[3] => 3rdcolor
[4] => size
[5] => 0
[6] => 1
[7] => 2
)
http://php.net/manual/en/function.array-keys.php