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
如果问题，即。
$a = [
[
"_id" => "5a96933414d48831a41901f2",
"discount_amount" => 3.29,
"discount_id" => "5a92656a14d488570c2c44a2",
],
[
"_id" => "5a9790fd14d48879cf16a9e8",
"discount_amount" => 4.53,
"discount_id" => "5a9265b914d488548513b122",
],
[
"_id" => "5a98083614d488191304b6c3",
"discount_amount" => 15.24,
"discount_id" => "5a92806a14d48858ff5c2ec3",
],
[
"_id" => "5a982a4914d48824721eafe3",
"discount_amount" => 45.74,
"discount_id" => "5a928ce414d488609e73b443",
],
[
"_id" => "5a982a4914d48824721eafe55",
"discount_amount" => 10.26,
"discount_id" => "5a928ce414d488609e73b443",
],
];
岁:
function searchForId($id, $array) {
$did=0;
$dia=0;
foreach ($array as $key => $val) {
if ($val['discount_id'] === $id) {
$dia +=$val['discount_amount'];
$did++;
}
}
if($dia != '') {
echo $dia;
var_dump($did);
}
return null;
};
print_r(searchForId('5a928ce414d488609e73b443',$a));
其他回答
我正在寻找类似于MySQL像%term%的功能。根据本页的答案。我能够从文件中搜索JSON数组。
user_list。Json看起来像下面的示例:
{
"user-23456": {
"name": "John Doe",
"age": "20",
"email": "doe@sample.com",
"user_id": "23456"
},
"user-09876": {
"name": "Ronojoy Adams",
"age": "35",
"email": "joy@sample.com",
"user_id": "09876"
},
"user-34890": {
"name": "Will Artkin",
"age": "16",
"email": "will@sample.com",
"user_id": "34890"
},
}
/*
*search_key_like
*/
function search_key_like($value, $key, $array) {
$results=array();
$keyword = preg_quote($value, '~');
foreach ($array as $k => $val) {
//if name a is spell John and keyword is sent as joh or JOH it will return null
//to fix the issue convert the string into lowercase and uppercase
$data=array($val[$key],strtolower($val[$key]),strtoupper($val[$key]));
if (preg_grep('~' . $keyword . '~', $data)) {
array_push($results,$val[$key]);
}
}
return $results;
}
使用===提取JSON文件===
$user_list_json='./user_list.json';
if(file_exists($user_list_json) && file_get_contents($user_list_json)){
$file_json_data=file_get_contents($user_list_json);
$json_array_data=json_decode($file_json_data,true);
$user_name_like = search_key_like('ron', 'name', $json_array_data);
print "<pre>".print_r($user_name_like,true);
}
只是分享，也许可以像这样。
if( ! function_exists('arraySearchMulti')){
function arraySearchMulti($search,$key,$array,$returnKey=false)
{
foreach ($array as $k => $val) {
if (isset($val[$key])) {
if ((string)$val[$key] == (string)$search) {
return ($returnKey ? $k : $val);
}
}else{
return (is_array($val) ? arraySearchMulti($search,$key,$val,$returnKey) : null);
}
}
return null;
}}
/**
* 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 === $needle setting visibility to 1 hidden");
return True;
}
}
return False;
}
我必须使用un函数来查找数组中的每个元素。所以我修改了Jakub truneeek的函数如下:
function search_in_array_r($needle, $array) {
$found = array();
foreach ($array as $key => $val) {
if ($val[1] == $needle) {
array_push($found, $val[1]);
}
}
if (count($found) != 0)
return $found;
else
return null;
}
如果问题，即。
$a = [
[
"_id" => "5a96933414d48831a41901f2",
"discount_amount" => 3.29,
"discount_id" => "5a92656a14d488570c2c44a2",
],
[
"_id" => "5a9790fd14d48879cf16a9e8",
"discount_amount" => 4.53,
"discount_id" => "5a9265b914d488548513b122",
],
[
"_id" => "5a98083614d488191304b6c3",
"discount_amount" => 15.24,
"discount_id" => "5a92806a14d48858ff5c2ec3",
],
[
"_id" => "5a982a4914d48824721eafe3",
"discount_amount" => 45.74,
"discount_id" => "5a928ce414d488609e73b443",
],
[
"_id" => "5a982a4914d48824721eafe55",
"discount_amount" => 10.26,
"discount_id" => "5a928ce414d488609e73b443",
],
];
岁:
function searchForId($id, $array) {
$did=0;
$dia=0;
foreach ($array as $key => $val) {
if ($val['discount_id'] === $id) {
$dia +=$val['discount_amount'];
$did++;
}
}
if($dia != '') {
echo $dia;
var_dump($did);
}
return null;
};
print_r(searchForId('5a928ce414d488609e73b443',$a));
