比较两个csv文件PHP的数据
截至目前，这是我的代码。我被困在如何查询/比较payment.csv到transactions.csv的数据。
<?php
//this shows the name, email, deposit date and amount from payment.csv
$data = file("data/payment.csv");
foreach ($data as $deposit){
$depositarray = explode(",", $deposit);
$depositlist = $depositarray;
$name = $depositlist[0];
$email = $depositlist[1];
$depositdate = $depositlist[9];
$depositamount = $depositlist[10];
//echo $depositamount;
}
//this shows the payment date and amount from transaction.csv
$databank = file("datas/transactions.csv");
foreach ($databank as $payment){
$paymentarray = explode(",", $payment);
$paymentlist = $paymentarray;
$paymentdate = $paymentlist[0];
$paymentamount = $paymentlist[5];
//echo $paymentamount;
}
?>
示例：
从payment.csv开始，每个（$depositdate＆amp; $depositamount）都会与transactions.csv（$paymentdate＆amp;＆amp; $paymentamount进行比较）。
匹配的每一行都会保存到array，然后会在表格中显示。如果不匹配保存到数组并稍后显示。
有人会帮我或给我一个想法来实现这个目标吗？只是为了显示匹配数据的所有行。
或者像这样：
当事务有多个匹配时，这应该是输出
3 个答案:
答案 0 :(得分：3)
要求：查找并记录与相应主记录匹配的交易记录。
必须保留与主记录匹配的所有交易记录的列表。
比较基于'日期'和金额。 （更新为轻松允许当前行中的任何值，因为您传递了要使用的'列名'数组。）
问题是，如果数组没有按照您要比较的键排序，这可能会非常昂贵。
一种方法是生成一个“密钥”，该密钥对于每个“数据密钥字段”是唯一的，但是很容易生成，并且是一个固定的大小，以便于比较。
然后使用这些“键”为原始记录生成lookup'生成密钥'数组。
这节省了必须在要比较的字段上提供排序数据。但是，生成的查找数组必须适合内存。
我决定对连接的数据键使用MD5哈希。碰撞的可能性在这个应用程序中并不重要。 MD5非常适合产生独特的哈希值。它也很快。
完成工作的班级：
// ---------------------------------------------------------------------------------
class HashMatch {
/*
* Generate a MD5 hash for each master and tranasaction using some
* of the data fields as the string to be hashed.
*/
/**
* Master source records
*
* @var array
*/
private $master = null;
/**
* Transaction Source records must have the same field names as the master
* of the indexes that are used to generate the MD5 hash
*
* @var array
*/
private $transaction = null;
/**
* The generated MD5 hash is the key in the Master source records.
*
* Each record has a list of other Master Record Ids that also have the same hash
*
* @var array
*/
private $hashMaster = array();
/**
* The generated MD5 hash is the key in the Transaction source records.
*
* Each record has a list of other Transaction Record Ids that also have the same hash
*
* @var array
*/
private $hashTransaction = array();
/**
* Specify which index names to use from the supplied data record arrays
* to generate the MD5 hash with.
*
* @var array
*/
private $keyNames = array();
/**
* Generate a MD5 hash for each master and transaction using some
* of the data fields as the string to be hashed.
*
* You can pass an array of field names to used to generate the key.
*
* This allows any records to be used in this class as you just provide
* the li9st of names to generate the MD5 hash
*
*
* @param array $master
* @param array $transaction
* @param array $keyNames
*
* @return void
*/
public function __construct(array $master,
array $transaction,
array $keyNames = array('when', 'amount'))
{
$this->master = $master;
$this->transaction = $transaction;
$this->keyNames = $keyNames;
}
/**
* Generate all the Hashes and store all the matching details
*
* @return bool
*/
public function generateMatches()
{
$this->processMaster();
$this->processTransaction();
return !empty($this->hashMaster) && !empty($this->hashTransaction);
}
/**
* Generate a list of MD5 hashes as a key
*
* Keep a list of other master records with the same hash
*
* @return void
*/
public function processMaster()
{
foreach ($this->master as $recordId => $data) {
$hash = $this->generateHash($data);
if (empty($this->hashMaster[$hash])) { // add it...
$this->hashMaster[$hash]['masterId'] = $recordId;
$this->hashMaster[$hash]['matchIds'] = array($recordId);
}
else { // is a duplicate so add to the match list
$this->hashMaster[$hash]['matchIds'][] = $recordId;
}
}
}
/**
* Generate a list of MD5 hashes as a key for the Transaction source
*
* Match the hashes against the master list and record if there is a match
*
* @return void
*/
public function processTransaction()
{
foreach ($this->transaction as $recordId => $data) {
$hash = $this->generateHash($data);
if (empty($this->hashMaster[$hash])) { // skip this record
continue;
}
// record a match with the master
if (empty($this->hashTransaction[$hash])) { // new record
$this->hashTransaction[$hash]['masterId'] = $this->hashMaster[$hash]['masterId'];
$this->hashTransaction[$hash]['matchIds'] = array();
}
// add to the list of matches
$this->hashTransaction[$hash]['matchIds'][] = $recordId;
}
}
/**
* Return Master MD5 list
*
* The keys are unique, however there are extra values:
*
* 'masterId' ==> The first record in the array with this key
*
* 'matchIds' ==> A *complete* list of all the master records that have this key.
* Yes, it includes itself, this allows you to just use this list
* when reporting.
*
* @return array
*/
public function getHashMasterList()
{
return $this->hashMaster;
}
/**
* Return Master MD5 list with more that one matching master
*
* i.e. duplicate master records with the same hash
*
* @return array
*/
public function getHashMatchedMasterList()
{
$out = array();
foreach ($this->hashMaster as $key => $item) {
if (count($item['matchIds']) >= 2) {
$out[$key] = $item;
}
}
return $out;
}
/**
* All the transactions that matched a master record
*
* @return array
*/
public function getHashTransactionList()
{
return $this->hashTransaction;
}
/**
* given a master hash then return the details as:
*
* i.e. this converts a hash key back into source records for processing.
*
* 1) A list of matching master records
*
* e.g. $out['master'][] ...
*
*
* 2) A list of matching transaction records
*
* e.g. $out['transaction'][] ...
*
* @param string $hash
*
* @return array
*/
public function getMatchedRecords($hash)
{
$out = array('key' => $hash,
'master' => array(),
'transaction' => array(),
);
if (!empty($this->hashMaster[$hash])) { // just in case is invalid hash
foreach ($this->hashMaster[$hash]['matchIds'] as $recordId) {
$out['master'][] = $this->master[$recordId];
}
}
if (!empty($this->hashTransaction[$hash])) {
foreach ($this->hashTransaction[$hash]['matchIds'] as $recordId) {
$out['transaction'][] = $this->transaction[$recordId];
}
}
return $out;
}
/**
* Generate an MD5 hash from the required fields in the data record
* The columns to use will have been passed in the constructor
* and found in '$keyNames'
*
* It is so you don't have to edit anything to use this class
*
* @param array $row
*
* @return string
*/
public function generateHash($row)
{
$text = '';
foreach ($this->keyNames as $name) {
$text .= $row[$name];
}
return Md5($text);
}
}
解释...
later....
运行它的代码：
// !!!! You can pass the names of the fields to be used to generate the key
$match = new HashMatch($master,
$transaction,
array('whenDone', 'amount'));
$match->generateMatches();
// print output...
echo '<pre>Hash Master Records with multiple Matching Masters ... ', PHP_EOL;
print_r($match->getHashMatchedMasterList());
echo '</pre>';
输出：
Matching Master to Transaction...
Array
(
[key] => 296099e19b77aad413600a1e2f2cb3cd
[master] => Array
(
[0] => Array
(
[name] => John Matched
[whenDone] => 2016-04-01
[amount] => 12345
[email] => johnMatched@y.com
)
[1] => Array
(
[name] => Jane Matched
[whenDone] => 2016-04-01
[amount] => 12345
[email] => janeMatched@y.com
)
)
[transaction] => Array
(
[0] => Array
(
[name] => John Doe
[whenDone] => 2016-04-01
[amount] => 12345
[email] => johndoe@y.com
)
[1] => Array
(
[name] => micky mean
[whenDone] => 2016-04-01
[amount] => 12345
[email] => mickym@y.com
)
)
)
测试数据
$master[] = array('name' => 'First last', 'whenDone' => '2016-03-03', 'amount' => 12000, 'email' => 'sample@y.com', );
$master[] = array('name' => 'John Matched', 'whenDone' => '2016-04-01', 'amount' => 12345, 'email' => 'johnMatched@y.com');
$master[] = array('name' => 'Jane Unmatched', 'whenDone' => '2016-05-02', 'amount' => 12345, 'email' => 'janeUnmatched@y.com');
$master[] = array('name' => 'Jane Matched', 'whenDone' => '2016-04-01', 'amount' => 12345, 'email' => 'janeMatched@y.com');
$transaction[] = array('name' => 'Mary Lamb', 'whenDone' => '2016-03-04', 'amount' => 12000, 'email' => 'maryl@y.com');
$transaction[] = array('name' => 'John Doe', 'whenDone' => '2016-04-01', 'amount' => 12345, 'email' => 'johndoe@y.com');
$transaction[] = array('name' => 'micky mean', 'whenDone' => '2016-04-01', 'amount' => 12345, 'email' => 'mickym@y.com');
答案 1 :(得分：1)
根据@Ryan Vincent的评论：
<?php
$masterData = array();
//this shows the name, email, deposit date and amount from payment.csv
$data = file("data/payment.csv");
foreach ($data as $deposit){
$depositarray = explode(",", $deposit);
$key = md5($depositlist[9] . $depositlist[10]); //date + amount
$depositlist = $depositarray;
$masterData[$key]['payment'] = array(
'name' => $depositlist[0],
'email' => $depositlist[1],
'depositdate' => $depositlist[9],
'depositamount' => $depositlist[10]
);
}
//this shows the payment date and amount from transaction.csv
$databank = file("datas/transactions.csv");
foreach ($databank as $payment){
$paymentarray = explode(",", $payment);
$key = md5($paymentlist[0] . $paymentlist[5]); //date + amount
$masterData[$key]['transaction'] = array(
'paymentdate' => $paymentlist[0],
'paymentamount' => $paymentlist[5]
);
}
?>
现在您有一个数组$masterData，其中所有数据的相同日期和金额都相同。
但我仍然不认为此列表对任何事情都有好处，因为您不知道哪个付款属于哪个交易，因为日期和金额可能相同。
但是，如果您现在执行以下检查：
<?php
foreach($masterData as $data) {
echo explode(',', $data[0]);
if(count($data) == 2) {
echo explode(',', $data[1]) . ', matched';
}
echo '<br/>';
}
?>
您应该拥有包含数据的每一行，并在有交易的时候在行尾matched。
但就像我说的那样 - 因为人们可能在同一天有相同金额的交易，你不知道哪个交易属于哪个人。
答案 2 :(得分：0)
首先，如果它是有效的csv文件，你应该通过fgetcsv（）解析数据，而不是依赖于字符串中没有逗号。
您可以在读取csv1时为存放日期创建索引数组，并在读取csv2时查找此索引。如果有匹配的日期，请比较金额并继续进行。
类似的东西：
// read csv1, store in array and create index
$data = array();
$fh = fopen($csv1, 'r');
while($row = fgetcsv($fh)) {
$data[] = $row;
$val = $row[$interestd_in];
$key = count($data) - 1;
$idx[$val][] = $key; // array containing all indices
}
fclose($fh);
// read csv2, lookup in index and process further
$fh = fopen($csv2, 'r');
while($row2 = fgetcsv($fh)) {
$val = $row2[$interest2];
if(!empty($idx[$val])) {
foreach($idx[$val] as $key) {
$row1 = $data[$key];
/*
do your further comparisons of these 2 data-lines
and output, if matches found
*/
}
}
}
fclose($fh);
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