我有一个数组，我想在其中搜索uid并获得数组的键。
例子
假设我们有以下二维数组:
$userdb = array(
array(
'uid' => '100',
'name' => 'Sandra Shush',
'pic_square' => 'urlof100'
),
array(
'uid' => '5465',
'name' => 'Stefanie Mcmohn',
'pic_square' => 'urlof100'
),
array(
'uid' => '40489',
'name' => 'Michael',
'pic_square' => 'urlof40489'
)
);
函数调用search_by_uid(100)(第一个用户的uid)应该返回0。
函数调用search_by_uid(40489)应该返回2。
我试着做循环，但我想要一个更快的执行代码。
当前回答
看起来array_filter将是合适的解决方案…
$userdb=Array
(
(0) => Array
(
(uid) => '100',
(name) => 'Sandra Shush',
(url) => 'urlof100'
),
(1) => Array
(
(uid) => '5465',
(name) => 'Stefanie Mcmohn',
(pic_square) => 'urlof100'
),
(2) => Array
(
(uid) => '40489',
(name) => 'Michael',
(pic_square) => 'urlof40489'
)
);
PHP代码
<?php
$search = 5465;
$found = array_filter($userdb,function($v,$k) use ($search){
return $v['uid'] == $search;
},ARRAY_FILTER_USE_BOTH); // With latest PHP third parameter is optional.. Available Values:- ARRAY_FILTER_USE_BOTH OR ARRAY_FILTER_USE_KEY
$values= print_r(array_values($found));
$keys = print_r(array_keys($found));
其他回答
你可以使用这个函数; https://github.com/serhatozles/ArrayAdvancedSearch
<?php
include('ArraySearch.php');
$query = "a='Example World' and b>='2'";
$Array = array(
'a' => array('d' => '2'),
array('a' => 'Example World','b' => '2'),
array('c' => '3'), array('d' => '4'),
);
$Result = ArraySearch($Array,$query,1);
echo '<pre>';
print_r($Result);
echo '</pre>';
// Output:
// Array
// (
// [0] => Array
// (
// [a] => Example World
// [b] => 2
// )
//
// )
看起来array_filter将是合适的解决方案…
$userdb=Array
(
(0) => Array
(
(uid) => '100',
(name) => 'Sandra Shush',
(url) => 'urlof100'
),
(1) => Array
(
(uid) => '5465',
(name) => 'Stefanie Mcmohn',
(pic_square) => 'urlof100'
),
(2) => Array
(
(uid) => '40489',
(name) => 'Michael',
(pic_square) => 'urlof40489'
)
);
PHP代码
<?php
$search = 5465;
$found = array_filter($userdb,function($v,$k) use ($search){
return $v['uid'] == $search;
},ARRAY_FILTER_USE_BOTH); // With latest PHP third parameter is optional.. Available Values:- ARRAY_FILTER_USE_BOTH OR ARRAY_FILTER_USE_KEY
$values= print_r(array_values($found));
$keys = print_r(array_keys($found));
扩展@mayhem创建的函数，这个例子将更多的是一个“模糊”搜索，如果你只是想匹配搜索字符串的一部分(大部分):
function searchArrayKeyVal($sKey, $id, $array) {
foreach ($array as $key => $val) {
if (strpos(strtolower($val[$sKey]), strtolower(trim($id))) !== false) {
return $key;
}
}
return false;
}
例如，数组中的值是Welcome to New York!而你只想要第一个“纽约”
$a = ['x' => ['eee', 'ccc'], 'b' => ['zzz']];
$found = null;
$search = 'eee';
array_walk($a, function ($k, $v) use ($search, &$found) {
if (in_array($search, $k)) {
$found = $v;
}
});
var_dump($found);
/**
* searches a simple as well as multi dimension array
* @param type $needle
* @param type $haystack
* @return boolean
*/
public static function in_array_multi($needle, $haystack){
$needle = trim($needle);
if(!is_array($haystack))
return False;
foreach($haystack as $key=>$value){
if(is_array($value)){
if(self::in_array_multi($needle, $value))
return True;
else
self::in_array_multi($needle, $value);
}
else
if(trim($value) === trim($needle)){//visibility fix//
error_log("$value === $needle setting visibility to 1 hidden");
return True;
}
}
return False;
}
