class HMongodb {
private $mongo; //Mongodb连接
private $curr_db_name;
private $curr_table_name;
private $error;
public function getInstance($mongo_server, $flag=array())
{
static $mongodb_arr;
if (empty($flag['tag']))
{
$flag['tag'] = 'default'; }
if (isset($flag['force']) && $flag['force'] == true)
{
$mongo = new HMongodb($mongo_server);
if (empty($mongodb_arr[$flag['tag']]))
{
$mongodb_arr[$flag['tag']] = $mongo;
}
return $mongo;
}
else if (isset($mongodb_arr[$flag['tag']]) && is_resource($mongodb_arr[$flag['tag']]))
{
return $mongodb_arr[$flag['tag']];
}
else
{
$mongo = new HMongodb($mongo_server);
$mongodb_arr[$flag['tag']] = $mongo;
return $mongo;
}
}
/**
* 构造函数
* 支持传入多个mongo_server(1.一个出问题时连接其它的server 2.自动将查询均匀分发到不同server)
*
* 参数:
* $mongo_server:数组或字符串-array("127.0.0.1:1111", "127.0.0.1:2222")-"127.0.0.1:1111"
* $connect:初始化mongo对象时是否连接,默认连接
* $auto_balance:是否自动做负载均衡,默认是
*
* 返回值:
* 成功:mongo object
* 失败:false
*/
private function __construct($mongo_server, $connect=true, $auto_balance=true)
{
if (is_array($mongo_server))
{
$mongo_server_num = count($mongo_server);
if ($mongo_server_num > 1 && $auto_balance)
{
$prior_server_num = rand(1, $mongo_server_num);
$rand_keys = array_rand($mongo_server,$mongo_server_num);
$mongo_server_str = $mongo_server[$prior_server_num-1];
foreach ($rand_keys as $key)
{
if ($key != $prior_server_num - 1)
{
$mongo_server_str .= ',' . $mongo_server[$key];
}
}
}
else
{
$mongo_server_str = implode(',', $mongo_server);
} }
else
{
$mongo_server_str = $mongo_server;
}
try {
$this->mongo = new Mongo($mongo_server, array('connect'=>$connect));
}
catch (MongoConnectionException $e)
{
$this->error = $e->getMessage();
return false;
}
}
/**
* 连接mongodb server
*
* 参数:无
*
* 返回值:
* 成功:true
* 失败:false
*/
public function connect()
{
try {
$this->mongo->connect();
return true;
}
catch (MongoConnectionException $e)
{
$this->error = $e->getMessage();
return false;
}
}
/**
* select db
*
* 参数:$dbname
*
* 返回值:无
*/
public function selectDb($dbname)
{
$this->curr_db_name = $dbname;
}
/**
* 创建索引:如索引已存在,则返回。
*
* 参数:
* $table_name:表名
* $index:索引-array("id"=>1)-在id字段建立升序索引
* $index_param:其它条件-是否唯一索引等
*
* 返回值:
* 成功:true
* 失败:false
*/
public function ensureIndex($table_name, $index, $index_param=array())
{
$dbname = $this->curr_db_name;
$index_param['safe'] = 1;
try {
$this->mongo->$dbname->$table_name->ensureIndex($index, $index_param);
return true;
}
catch (MongoCursorException $e)
{
$this->error = $e->getMessage();
return false;
}
}
/**
* 插入记录
*
* 参数:
* $table_name:表名
* $record:记录
*
* 返回值:
* 成功:true
* 失败:false
*/
public function insert($table_name, $record)
{
$dbname = $this->curr_db_name;
try {
$this->mongo->$dbname->$table_name->insert($record, array('safe'=>true));
return true;
}
catch (MongoCursorException $e)
{
$this->error = $e->getMessage();
return false;
}
}
/**
* 查询表的记录数
*
* 参数:
* $table_name:表名
*
* 返回值:表的记录数
*/
public function count($table_name)
{
$dbname = $this->curr_db_name;
return $this->mongo->$dbname->$table_name->count();
}
/**
* 更新记录
*
* 参数:
* $table_name:表名
* $condition:更新条件
* $newdata:新的数据记录
* $options:更新选择-upsert/multiple
*
* 返回值:
* 成功:true
* 失败:false
*/
public function update($table_name, $condition, $newdata, $options=array())
{
$dbname = $this->curr_db_name;
$options['safe'] = 1;
if (!isset($options['multiple']))
{
$options['multiple'] = 0; }
try {
$this->mongo->$dbname->$table_name->update($condition, $newdata, $options);
return true;
}
catch (MongoCursorException $e)
{
$this->error = $e->getMessage();
return false;
}
}
/**
* 删除记录
*
* 参数:
* $table_name:表名
* $condition:删除条件
* $options:删除选择-justOne
*
* 返回值:
* 成功:true
* 失败:false
*/
public function remove($table_name, $condition, $options=array())
{
$dbname = $this->curr_db_name;
$options['safe'] = 1;
try {
$this->mongo->$dbname->$table_name->remove($condition, $options);
return true;
}
catch (MongoCursorException $e)
{
$this->error = $e->getMessage();
return false;
} }
/**
* 查找记录
*
* 参数:
* $table_name:表名
* $query_condition:字段查找条件
* $result_condition:查询结果限制条件-limit/sort等
* $fields:获取字段
*
* 返回值:
* 成功:记录集
* 失败:false
*/
public function find($table_name, $query_condition, $result_condition=array(), $fields=array())
{
$dbname = $this->curr_db_name;
$cursor = $this->mongo->$dbname->$table_name->find($query_condition, $fields);
if (!empty($result_condition['start']))
{
$cursor->skip($result_condition['start']);
}
if (!empty($result_condition['limit']))
{
$cursor->limit($result_condition['limit']);
}
if (!empty($result_condition['sort']))
{
$cursor->sort($result_condition['sort']);
}
$result = array();
try {
while ($cursor->hasNext())
{
$result[] = $cursor->getNext();
}
}
catch (MongoConnectionException $e)
{
$this->error = $e->getMessage();
return false;
}
catch (MongoCursorTimeoutException $e)
{
$this->error = $e->getMessage();
return false;
}
return $result;
}
/**
* 查找一条记录
*
* 参数:
* $table_name:表名
* $condition:查找条件
* $fields:获取字段
*
* 返回值:
* 成功:一条记录
* 失败:false
*/
public function findOne($table_name, $condition, $fields=array())
{
$dbname = $this->curr_db_name;
return $this->mongo->$dbname->$table_name->findOne($condition, $fields);
}
/**
* 获取当前错误信息
*
* 参数:无
*
* 返回值:当前错误信息
*/
public function getError()
{
return $this->error;
}
/*** Mongodb类** examples:
* $mongo = new HMongodb("127.0.0.1:11223");
* $mongo->selectDb("test_db");
* 创建索引
* $mongo->ensureIndex("test_table", array("id"=>1), array('unique'=>true));
* 获取表的记录
* $mongo->count("test_table");
* 插入记录
* $mongo->insert("test_table", array("id"=>2, "title"=>"asdqw"));
* 更新记录
* $mongo->update("test_table", array("id"=>1),array("id"=>1,"title"=>"bbb"));
* 更新记录-存在时更新,不存在时添加-相当于set
* $mongo->update("test_table", array("id"=>1),array("id"=>1,"title"=>"bbb"),array("upsert"=>1));
* 查找记录
* $mongo->find("c", array("title"=>"asdqw"), array("start"=>2,"limit"=>2,"sort"=>array("id"=>1)))
* 查找一条记录
* $mongo->findOne("$mongo->findOne("ttt", array("id"=>1))", array("id"=>1));
* 删除记录
* $mongo->remove("ttt", array("title"=>"bbb"));
* 仅删除一条记录
* $mongo->remove("ttt", array("title"=>"bbb"), array("justOne"=>1));
* 获取Mongo操作的错误信息
* $mongo->getError();
*/
}

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PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

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PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

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