我继承了下面的代码，它为名为'database_name'的MySQL数据库创建了一个Web界面，并由变量$database定义。
我想在此脚本中添加一个额外的数据库，以便可以在第二个数据库中创建相同的接口（其设置方式与具有相同表名的第一个数据库完全相同，但包含不同的数据）。有没有办法让$database成为一个字符串数组，我可以为多个数据库名称循环？
<?php
class DatabaseInterface {
public $host = "localhost"; //(name or ip address)
public $userName = "aksfhah";
public $passWord = "**********";
public $database = 'database_name';
public $tableData = "measurements";
public $tableMinbins = "minbins";
public $tableHourbins = "hourbins";
public $tableDaybins = "daybins";
public $tableDescriptions = "measurementDescriptions";
public $tableSpecs = "experimentDescriptions";
public $connection;
public function __construct($databaseName = "database_name") {
$this->database = $databaseName;
$this->connect();
}
public function connect($databaseName = null) {
$dbh = mysql_connect($this->host, $this->userName, $this->passWord);
if (is_null($databaseName)) {
mysql_select_db($this->database);
} else {
mysql_select_db($databaseName);
}
$this->connection = $dbh;
return $dbh;
}
public function initializeDatabase() {
$this->createDataTable($this->tableData);
$query = "create table if not exists $this->tableDescriptions (id int auto_increment primary key,type varchar(255),
description varchar(255), experimentname varchar(255), unique Key(description,experimentname)) engine=myisam";
mysql_query($query); //create a table if it does not exist
echo mysql_error(); //report error if one occurred
}
private function createDataTable($tableName) {
$query = "CREATE TABLE IF NOT EXISTS $tableName (
id smallint(5) unsigned NOT NULL,
time datetime NOT NULL,
measurement float DEFAULT NULL,
rebinned tinyint(4) DEFAULT '0',
PRIMARY KEY (id,time),
KEY (rebinned,id)
) ENGINE=MyISAM";
mysql_query($query); //create a table if it does not exist
echo mysql_error(); //report error if one occurred
}
public function insertByDescription($time, $value, $channelDescription, $experimentDescription, $type = "other") {
$sensorID = $this->createIdFromDescription($channelDescription, $experimentDescription, $type);
return $this->insertById($time, $value, $sensorID);
}
public function insertMultipleById($timeArray, $valueArray, $sensorID,$tableName=null) {
if(is_null($tableName)){
$tableName= $this->tableData;
}
if (count($timeArray) == 0)
return 0;
$query = "insert ignore into $tableName (id,time,measurement)
VALUES ";
for ($index = 0; $index < count($timeArray); $index++) {
$timeString = $timeArray[$index]->format("Y-m-d H:i:s");
$value = $valueArray[$index];
$query = $query . "('$sensorID','$timeString','$value'),";
}
$query = substr($query, 0, strlen($query) - 1); //trim final comma
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error();
return false;
} else
return mysql_affected_rows();
}
public function insertMultipleByDescription($timeArray, $valueArray, $channelDescription, $experimentDescription, $type = "other",$tableName=null) {
$sensorID = $this->createIdFromDescription($channelDescription, $experimentDescription, $type);
return $this->insertMultipleById($timeArray, $valueArray, $sensorID,$tableName);
}
public function insertById(DateTime $time, $value, $sensorID) {
$timeString = $time->format("Y-m-d H:i:s");
$query = "insert ignore into $this->tableData (id,time,measurement)
VALUES ('$sensorID','$timeString','$value')";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error();
return false;
} else if (mysql_affected_rows() == 0) {
return false;
} else {
return true;
}
}
public function createIdFromDescription($channelDescription, $experimentDescription, $type) {
$sensorId = $this->getIdFromDescription($channelDescription, $experimentDescription);
if (!$sensorId) {
$query = "insert ignore into $this->tableDescriptions (description,experimentname,type)
VALUES ('$channelDescription','$experimentDescription','$type')";
$result = mysql_query($query);
$sensorId = mysql_insert_id();
}
return $sensorId;
}
public function getIdFromDescription($measurementDescription, $experimentDescription) {
$sensorId = false;
$query = "select id from $this->tableDescriptions where description like '$measurementDescription'
&& experimentname like '$experimentDescription'";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
}
if (mysql_num_rows($result) > 0) {
$row = mysql_fetch_array($result);
$sensorId = $row['id'];
}
return $sensorId;
}
function getDataById($id, $startDate, $endDate, $interval = "") {
$data = array();
$startDateString = $startDate->format("Y-m-d H:i:s");
$endDateString = $endDate->format("Y-m-d H:i:s");
$query = "select time,measurement from $this->tableData where id='$id' && time>='$startDateString' && time <='$endDateString' order by time asc " . $interval = "" ? "" : "group by $interval";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
}
while ($row = mysql_fetch_array($result)) {
//$time = new DateTime($row['time']);
$data[] = array($row['time'], $row['measurement'] * 1);
}
return $data;
}
public function getMostRecentData($id, $table) {
$query = "select date(max(time)) as time,measurement from $table where id='$id'";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
} elseif (mysql_num_rows($result) > 0) {
$row = mysql_fetch_array($result);
return $row;
} else {
return false;
}
}
public function getExperimentList() {
$list = array();
$query = "select distinct experimentname from $this->tableDescriptions";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
}
while ($row = mysql_fetch_array($result)) {
$list[] = $row['experimentname'];
}
return $list;
}
public function getChannelList($experimentDescription) {
$list = array();
$query = "select id,description,type from $this->tableDescriptions where experimentname='$experimentDescription'";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
}
while ($row = mysql_fetch_array($result)) {
$list[$row['description']] = array("id" => $row['id'], "type" => $row['type']);
}
return $list;
}
public function getDescriptionFromId($id) {
$query = "select * from $this->tableDescriptions where id='$id'";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
}
if (mysql_num_fields($result) > 0) {
$row = mysql_fetch_array($result);
return array($row['type'], $row['description'], $row['experimentname']);
} else {
return false;
}
}
public function getDisplayName($experimentName) {
$query = "select displayName from $this->tableSpecs where experimentName='$experimentName'";
$result = mysql_query($query);
echo mysql_error();
$row = mysql_fetch_array($result);
if ($row) {
return $row['displayName'];
} else {
return false;
}
}
public function simpleQuery($query) {
$result = mysql_query($query);
echo mysql_error();
if ($result) {
$row = mysql_fetch_array($result);
if ($row) {
return $row[0];
} else {
return FALSE;
}
} else {
return FALSE;
}
}
public function rebin($tableSource, $tableTarget, $numSeconds, $sum = false) {
$this->createDataTable($tableTarget);
echo "Updating $tableSource to set rebinned from 0 to 2...";
$query = "update $tableSource set rebinned=2 where rebinned =0;";
mysql_query($query);
echo mysql_error();
echo "Done.\n";
$numRows = mysql_affected_rows();
echo "Found $numRows records in $tableSource that need rebinning...\n";
$query = "select id,from_unixtime(floor(unix_timestamp(min(time))/$numSeconds)*$numSeconds) as mintime from $tableSource where rebinned=2 group by id;";
$result = mysql_query($query);
echo mysql_error();
if ($result) {
while ($row = mysql_fetch_array($result)) {
$id = $row['id'];
$mintime = $row['mintime'];
echo $id . "...";
$query = "INSERT INTO $tableTarget (id,time,measurement,rebinned)
SELECT id,from_unixtime(floor(unix_timestamp(time)/$numSeconds)*$numSeconds)," . ($sum ? "sum" : "avg") . "(measurement) as measurement,0
FROM $tableSource WHERE id=$id && time>='$mintime'
GROUP BY id,floor(unix_timestamp(time)/$numSeconds)
ON DUPLICATE KEY UPDATE measurement=values(measurement), rebinned=0;";
mysql_query($query);
//echo $query;
echo mysql_error();
echo "Done.\n";
}
echo "Updating $tableSource to set rebinned from 2 to 1...";
$query = "update $tableSource set rebinned=1 where rebinned =2;";
mysql_query($query);
echo mysql_error();
echo "Done.\n";
}
}
public function getDCPower($experimentName, $startDate, $endDate) {
$out = array();
$query = $this->buildDCPowerQuery($experimentName, $this->tableMinbins);
if ($query) {
if ($startDate != "") {
$query = $query . " && m0.time>='$startDate' ";
}
if ($endDate != "") {
$query = $query . " && m0.time<='$endDate' ";
}
echo $query;
$result = mysql_query($query);
echo mysql_error();
while ($row = mysql_fetch_array($result)) {
// echo $row['time'].", ".$row['power']."\n";
$out[] = array($row['time'], $row['power'] + 0);
}
return $out;
} else {
return FALSE;
}
}
}
?>
答案 0 :(得分：2)
有没有办法让$ database成为一个字符串数组，我可以为多个数据库名称循环？
不，它不起作用。您定义的脚本是一个类。您必须查看使用该类的文件，其中会有类似
的内容$interface = new DatabaseInterface("database1");
你可以做
之类的事情$interface = array();
$interface[0] = new DatabaseInterface("database1");
$interface[1] = new DatabaseInterface("database2");
并对两个数据库使用两个接口实例。