PHP陣列Key作爲時間戳和合並工作不

Question

我想建立具有密鑰作爲時間戳陣列，以及由於某種原因，它的工作原理，當我手動建立它，但是當我嘗試合併它不工作新物品。

我讀合併的最快方法是：[]數組，但它增加了[0]，[1]在關鍵的面前，我需要找到解決這個工作，也索引。因爲我需要通過時間戳訪問密鑰。

$timeStamp=mktime(0, 0, 0, date("m"), date("d"), date("Y")); 

$maxCapArray=array(); 

// IDEAL MERGING BUT NOT WORKING: $maxCapArray[]= $timeStamp => array('Book'=>'BLABLA','Author'=>'BLOBLO'); 

// (string) NOT WORKING: $maxCapArray[]= (string)$timeStamp => array('Book'=>'BLABLA','Author'=>'BLUBLU'); 

$maxCapArray = array($timeStamp => array('Book'=>'BLABLA','Author'=>'BLEBLE')); $maxCapArray = array($timeStamp => array('Book'=>'BLABLA','Author'=>'BLIBLI')); 

// MANUALLY ONLY TAKES THE LAST ITEM: 

echo $maxCapArray[$timeStamp]['Author']; 

任何幫助將不勝感激。

Answer 1

不能添加元素，如$maxCapArray[]= $timeStamp => array('Book'=>'BLABLA','Author'=>'BLOBLO');。

• 你可以這樣做：

  $ V =陣列（）;
  $ V [] =陣列（ 「A」=>數組（1,2,3））;

這將得到：

print_r($v); 
Array ([0] => Array ([a] => Array ([0] => 1 [1] => 2 [2] => 3))) 

• 或該：

  $ V [ 「一個」] =陣列（1,2,3）;

將得到：

print_r($v); 
Array ([a] => Array ([0] => 1 [1] => 2 [2] => 3)) 

Answer 2

目前尚不清楚的結構，你會最終需要的東西。

我想你可能需要的東西是這樣的：

<?php 

// initial an empty array 
$maxCapArray=array(); 

// first run on a day 
$timeStampA=mktime(0, 0, 0, date("m"), date("d"), date("Y")); 
$maxCapArray[$timestampA] = array('Book'=>'BLABLA','Author'=>'BLEBLE'); 

// second run on a different day 
$timeStampB=mktime(0, 0, 0, date("m"), date("d"), date("Y")); 
$maxCapArray[$timestampB] = array('Book'=>'BLABLA','Author'=>'BLEBLE'); 

// third run on yet another day 
$timeStampC=mktime(0, 0, 0, date("m"), date("d"), date("Y")); 
$maxCapArray[$timestampC] = array('Book'=>'BLABLA','Author'=>'BLEBLE'); 

// ... 

// to retrieve the Author of a given timestamp 
echo $maxCapArray[$timestampA]['Author']; 
echo $maxCapArray[$timestampB]['Author']; 
echo $maxCapArray[$timestampC]['Author']; 

?> 

第一行會刪除您之前獲得的所有數據。請以合理的方式使用它們。

另一種猜測：

<?php 

// initial an empty array 
$maxCapArray=array(); 
$timeStamp=mktime(0, 0, 0, date("m"), date("d"), date("Y")); 

// suppose you want $maxCapArray[$timestamp]['Book'] and $maxCapArray[$timestamp]['author'] 
// to be arrays 
if (!isset($maxCapArray[$timestamp])) $maxCapArray[$timestamp] = array(); 
$maxCapArray[$timestamp]['Book'][] = 'BLABLA'; 
$maxCapArray[$timestamp]['Author'][] = 'BLEBLE'; 

$maxCapArray[$timestamp]['Book'][] = 'BLABLA 2'; 
$maxCapArray[$timestamp]['Author'][] = 'BLEBLE 2'; 

// ... 

// you should get an array: 
var_dump($maxCapArray[$timestamp]['Author']); 

?> 

更新：看來你在尋找這個

<?php 

// initial an empty array 
$maxCapArray=array(); 
$timeStamp=mktime(0, 0, 0, date("m"), date("d"), date("Y")); 

// suppose you want $maxCapArray[$timestamp]['Book'] and $maxCapArray[$timestamp]['author'] 
// to be arrays 
if (!isset($maxCapArray[$timestamp])) $maxCapArray[$timestamp] = array(); 
$maxCapArray[$timestamp]['Author']['Book 1'] = 'Author 1'; 
$maxCapArray[$timestamp]['Author']['Book 2'] = 'Author 2'; 
$maxCapArray[$timestamp]['Author']['Book 3'] = 'Author 2'; 

// ... 

// review your array: 
var_dump($maxCapArray[$timestamp]['Author']); 

// retrieve 
$author_name = 'Author A'; 
$book_name = 'Book 1'; 
echo $maxCapArray[$timestamp][$author_name][$book_name]; 

?> 

一些更多的建議

數組只爲做一個索引結構1具體情況。幾天後，你可能需要另一個。也許你需要按書搜索作者，或者按書搜索時間戳。誰知道？

我建議你使用關係型數據庫對這些情況。您可以在MySQL中創建數據庫表，如下所示：

+-----------+---------------------+------------------------------------------+---------------------+ 
| record_id | author    | book          | timestamp   | 
+-----------+---------------------+------------------------------------------+---------------------+ 
| 1   | Jules Verne   | Twenty Thousand Leagues Under the Sea | 2013-01-12 12:24:00 | 
| 2   | Jules Verne   | Journey to the Center of the Earth  | 2013-01-12 13:01:00 | 
| 3   | William Shakespeare | Hamlet         | 2013-01-12 16:51:00 | 
+-----------+---------------------+------------------------------------------+---------------------+ 

MySQL將自動執行所有索引工作。

然後，當你需要的數據，就可以連接到數據庫，並宣讀：

<?php 

// connect to 
mysql_connect('localhost', 'db_user', 'db_password'); 
mysql_select_db('library_database'); 

// ask database of books of a certain timestamp and of certain author 
$results = mysql_query('SELECT author FROM book_records WHERE 
    timestamp="2013-01-12 13:01:00" AND book="Journey to the Center of the Earth"'); 

// read the database's answer to $books array 
$authors = array(); 
while (($row = mysql_fetch_assoc($results)) != FALSE) { 
    $authors = $row['author']; 
} 

// you may examine the array here 
// this is a list of author of the specific timestamp 
// and of specific book 
var_dump($authors); 

?> 

如果您有其他需要，你可以更改代碼：

<?php 

// connect to 
mysql_connect('localhost', 'db_user', 'db_password'); 
mysql_select_db('library_database'); 


// if you want to have all the timestamp of a book and an author 
// you may just do this 
$results = mysql_query('SELECT timestamp FROM book_records WHERE 
    author="Jules Verne" AND book="Journey to the Center of the Earth"'); 


// read the database's answer to $books array 
$timestamps = array(); 
while (($row = mysql_fetch_assoc($results)) != FALSE) { 
    $timestamps = $row['timestamp']; 
} 

// this is the list of related timestamp 
var_dump($timestamps); 

?> 

Answer 3

你可能正在尋找此：

$timeStamp = mktime(0, 0, 0, date("m"), date("d"), date("Y")); 
$maxCapArray = array(); 

$maxCapArray[$timeStamp] = array(); 
$maxCapArray[$timeStamp][] = array('Book'=>'BLABLA','Author'=>'BLEBLE'); 
$maxCapArray[$timeStamp][] = array('Book'=>'BLABLA','Author'=>'BLIBLI'); 

echo $maxCapArray[$timeStamp][0]['Author']; // == BLEBLE 

被警告，如果您使用array_merge()合併數字lly索引數組，鍵將從零開始重新索引，請參閱http://php.net/manual/en/function.array-merge.php