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
for( $i =0; $i < sizeof($allUsers); $i++)
{
$NEEDLE1='firstname';
$NEEDLE2='emailAddress';
$sterm='Tofind';
if(isset($allUsers[$i][$NEEDLE1]) && isset($allUsers[$i][$NEEDLE2])
{
$Fname= $allUsers[$i][$NEEDLE1];
$Lname= $allUsers[$i][$NEEDLE2];
$pos1 = stripos($Fname, $sterm);
$pos2=stripos($Lname, $sterm);//not case sensitive
if($pos1 !== false ||$pos2 !== false)
{$resultsMatched[] =$allUsers[$i];}
else
{ continue;}
}
}
Print_r($resultsMatched); //will give array for matched values even partially matched
在上述代码的帮助下，可以从2D数组中的任何列中找到任何(部分匹配)数据，因此可以根据需要找到用户id。
其他回答
在Jakub的出色回答的基础上，这里有一个更通用的搜索，将允许指定键(不仅仅是uid):
function searcharray($value, $key, $array) {
foreach ($array as $k => $val) {
if ($val[$key] == $value) {
return $k;
}
}
return null;
}
用法:$results = searcharray('searchvalue'， searchkey， $array);
虽然这是一个老问题，也有一个公认的答案，但我想对公认的答案提出一个改变。首先，我同意这个公认的答案是正确的。
function searchArrayKeyVal($sKey, $id, $array) {
foreach ($array as $key => $val) {
if ($val[$sKey] == $id) {
return $key;
}
}
return false;
}
将预设的“uid”替换为函数中的一个参数，因此现在调用下面的代码意味着您可以跨多个数组类型使用一个函数。零钱很小，但能带来细微的差别。
// Array Data Of Users
$userdb = array (
array ('uid' => '100','name' => 'Sandra Shush','url' => 'urlof100' ),
array ('uid' => '5465','name' => 'Stefanie Mcmohn','url' => 'urlof100' ),
array ('uid' => '40489','name' => 'Michael','url' => 'urlof40489' ),
);
// Obtain The Key Of The Array
$arrayKey = searchArrayKeyVal("uid", '100', $userdb);
if ($arrayKey!==false) {
echo "Search Result: ", $userdb[$arrayKey]['name'];
} else {
echo "Search Result can not be found";
}
PHP小提琴示例
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',$a));
只是分享，也许可以像这样。
if( ! function_exists('arraySearchMulti')){
function arraySearchMulti($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;
}}
试试这个
<?php
function recursive_array_search($needle,$haystack) {
foreach($haystack as $key=>$value) {
$current_key=$key;
if($needle===$value OR (is_array($value) &&
recursive_array_search($needle,$value) !== false)) {
return $current_key;
}
}
return false;
}
?>
