note 90578 added to function.array-search
| From: | alex at softservice dot org | Date: | Wed, 29 Apr 2009 05:03:17 +0000 |
| Subject: | note 90578 added to function.array-search | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-153957@lists.php.net to get a copy of this message | ||
Can be useful for searching in a multi-dimensional array:
<?php
function array_search_in_level($needle, $haystack, $key, &$result, $searchlevel = 0) {
while(is_array($haystack) && isset($haystack[key($haystack)])) {
if($searchlevel == 0 && ($key == 0 || key($haystack) == $key) &&
$haystack[key($haystack)] == $needle) {
$result = $haystack;
} elseif($searchlevel > 0) {
array_search_in_level($needle, $haystack[key($haystack)], $key, $result, $searchlevel - 1);
}
next($haystack);
}
}
?>
Examples:
1. 2-dimensional array, search by both key and value
<?php
$arr1 = array(
1 => array('id' => 1, 'name' => 'Alex', 'gender'
=> 'male'),
...
12 => array('id' => 12, 'name' => 'John',
'gender' => 'male'),
);
array_search_in_level('John', $arr1, 'name', $result, 1);
$result is:
array(
'id' => int 12
'name' => string 'John' (length=4)
'gender' => string 'male' (length=4)
)
?>
2. 3-dimensional array, search by value only:
<?php
$arr2 = array(
1 => array('id' => 1, 'name' => 'Alex', 'gender'
=> 'male'),
...
12 => array('id' => 12, 'name' => 'John',
'gender' => 'male', 'friends' => array('Helen',
'Julia')),
);
array_search_in_level('Helen', $arr1, 0, $result, 2);
$result is:
array(
0 => string 'Helen' (length=5)
1 => string 'Julia' (length=5)
)?>
----
Server IP: 78.41.104.4
Probable Submitter: 89.251.101.62
----
Manual Page -- http://www.php.net/manual/en/function.array-search.php
Edit -- https://master.php.net/note/edit/90578
Del: integrated -- https://master.php.net/note/delete/90578/integrated
Del: useless -- https://master.php.net/note/delete/90578/useless
Del: bad code -- https://master.php.net/note/delete/90578/bad+code
Del: spam -- https://master.php.net/note/delete/90578/spam
Del: non-english -- https://master.php.net/note/delete/90578/non-english
Del: in docs -- https://master.php.net/note/delete/90578/in+docs
Del: other reasons-- https://master.php.net/note/delete/90578
Reject -- https://master.php.net/note/reject/90578
Search -- https://master.php.net/manage/user-notes.php