会话中的Laravel多维数组，查找，覆盖

Question

我想在会话中保留多维数组：

$preBookDataToCompare = [];
$preBookDataToCompare['preBookHash'] = $this->hashString($dataToHash);
$preBookDataToCompare['user_id'] = $user_id;
$preBookDataToCompare['item_id'] = $item_id;
$preBookDataToCompare['start_date'] = $start_date->toDateString();
$preBookDataToCompare['end_date'] = $end_date->toDateString();

会话：：推送('preBookDataToCompare'，$preBookDataToCompare(；

数组是在用户打开页面后生成并添加到会话中的。他可能会打开带有不同item_id或日期的新TAB。。。那么如何在会话中检查该数组：

1. 如果设置：user_id&amp；item_id&amp；开始日期&amp；结束日期EXIST
2. 如果不存在，如何用这些新值将新数组添加到多数组中
3. 如果存在YES，如何仅覆盖数组中所选数组的['preBookHash']

dd(Session::get("preBookDataToCompare"));显示：

0 => array:5 [▼
"preBookHash" => "c900cf028634f1d00005c6aad98be406"
"user_id" => "a9eac834-7e11-4892-accd-50cd2386c3cc"
"item_id" => "4a69e17e-7023-4a9d-9c6b-25bc73b7e0c3"
"start_date" => "2021-03-25"
"end_date" => "2021-03-31"
]
1 => array:5 [▼
"preBookHash" => "62bf5756b311b2d2b1cada8d9fe997e2"
"user_id" => "a9eac834-7e11-4892-accd-50cd2386c3cc"
"item_id" => "21eeccd9-cc13-4ee7-8432-e7f83792cdfd"
"start_date" => "2021-03-25"
"end_date" => "2021-03-31"
]
2 => array:5 [▼
"preBookHash" => "c900cf028634f1d00005c6aad98be406"
"user_id" => "a9eac834-7e11-4892-accd-50cd2386c3cc"
"item_id" => "4a69e17e-7023-4a9d-9c6b-25bc73b7e0c3"
"start_date" => "2021-03-25"
"end_date" => "2021-03-31"
]
]```
[0] and [2] are dubled :(
Session::push('preBookDataToCompare', $preBookDataToCompare);
I know that PUSH is append new array.
How to make it checks if values(dataset) exists , if yes overwrite , if not add new one , but prevent dubbles. ?
--------------------------------------------------------
WORKING SOLUTION : (thx to : Mihir Bhende )
$preBookDataToCompare = [];
$preBookDataToCompare['preBookHash'] = $this->hashString($dataToHash);
$preBookDataToCompare['user_id'] = $user_id;
$preBookDataToCompare['item_id'] = $item_id;
$preBookDataToCompare['start_date'] = $start_date->toDateString();
$preBookDataToCompare['end_date'] = $end_date->toDateString();
$newItem = [
'user_id' => $user_id,
'item_id' => $item_id,
'start_date' => $start_date->toDateString(),
'end_date' => $end_date->toDateString()
];
$newHash = $this->hashString($dataToHash);
// Get existing session data
$sessionData = collect(Session::get('preBookDataToCompare'));
// Check if new item already exists matching key value pairs
$alreadyExists = $sessionData->contains(function($value) use($newItem, $newHash){
$newItem['preBookHash'] = $newHash ;
return $newItem == $value;
});
// Add if item does not exist
if(!$alreadyExists){
$newItem['preBookHash'] = $this->hashString($dataToHash);
$sessionData->push($newItem);
}
Session::put('preBookDataToCompare', $sessionData->toArray());

Answer 1

您可以使用laravel的集合方法contains()，它可以获得闭包。您也可以执行foreach并为此使用纯PHP。我更喜欢集合，这样您就不必检查会话值是否为空。

<?php 
$newItem = [
'someKey' => 'somevalue',
'otherkey' => 'othervalue'
];
// Get existing session data
$sessionData = collect($session->get('preBookDataToCompare'));
// Check if new item already exists matching key value pairs
$alreadyExists = $sessionData->contains(function($value) use($newItem){

return $newItem == $value;
});
// Add if item does not exist
if(!$alreadyExists){
$sessionData->push($newItem);
session()->put('preBookDataToCompare', $sessionData->toArray());
}