MongoDB database operation class sharing _php instance of PHP implementation

Class Hmongodb {private $mongo;
  MongoDB connection 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 $m
    ongodb_arr[$flag [' tag ']];
      else {$mongo = new Hmongodb ($mongo _server);
      $mongodb _arr[$flag [' tag ']] = $mongo;
    return $mongo; }/** * constructor * supports incoming multiple mongo_server (1. Connect the other server 2 when a problem occurs. Automatically distribute queries evenly to different servers) * Parameters: * $mongo _server: Array or String-array ("127.0.0.1:1111", "127.0.0.1:2222")-"127.0.0.1:1111 "* $connect: Whether to initialize the MONGO object when connected, the default connection * $auto _balance: Whether automatic load balancing, the default is * * return value: * Success: MONGO Object * failed: Fals E/Private Function __construct ($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. = ', '. $mongo _ser
    ver[$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 = $e->getmessaGE ();
   return false;
    }/** * Connection MongoDB Server * * Parameters: No * * return Value: * Success: TRUE * failed: false/Public Function connect () {
      try {$this->mongo->connect ();
    return true;
      The catch (Mongoconnectionexception $e) {$this->error = $e->getmessage ();
    return false; }/** * Select DB * * Parameters: $dbname * * return value: no */Public function Selectdb ($dbname) {$this->
  Curr_db_name = $dbname;
  /** * CREATE INDEX: If index already exists, return. * * Parameters: * $table _name: Table name * $index: Index-array ("id" =>1)-establish ascending index in ID field * $index _param: Other conditions-Unique index etc * Return value: * Successful : True * Failed: false */Public function ensureindex ($table _name, $index, $index _param=array ()) {$dbname = $this-&
    Gt;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; /** * Insert Record * * Parameters: * $table _name: Table name * $record: Record * * return value: * Success: TRUE * failed: false/Public Fu
    Nction Insert ($table _name, $record) {$dbname = $this->curr_db_name;
      try {$this->mongo-> $dbname-> $table _name->insert ($record, Array (' safe ' =>true));
    return true;
      The catch (Mongocursorexception $e) {$this->error = $e->getmessage ();
    return false; 
    /** * Query table number of records * * Parameters: * $table _name: Table name * * Return value: Table number of records/Public function count ($table _name) {
    $dbname = $this->curr_db_name;
  return $this->mongo-> $dbname-> $table _name->count (); /** * Update Record * * Parameters: * $table _name: Table name * $condition: Update condition * $newdata: New data record * $options: Update selection-upsert/multi PLE * * Return value: * Successful: TRUE * failed: false */Public Function update ($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;
      The catch (Mongocursorexception $e) {$this->error = $e->getmessage ();
    return false; }/** * Delete record * * Parameters: * $table _name: Table name * $condition: Delete condition * $options: Delete selection-justone * * return Value: * Success: True * Failed: false */Public function remove ($table _name, $condition, $options =array ()) {$dbname = $this->cur
    R_db_name;
    $options [' safe '] = 1;
      try {$this->mongo-> $dbname-> $table _name->remove ($condition, $options);
    return true;
      The catch (Mongocursorexception $e) {$this->error = $e->getmessage ();
  return false; /** * Find Records * * Parameters: * $table _name: Table name * $query _condition: Field Lookup criteria * $result _condition: Query Result Restrictions-limit/so RT etc * $fields: Get field * * return value: * Success: Recordset * failed: false/Public Function find ($table _name, $query _condition, $result _condition=ar
    Ray (), $fields =array ()) {$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 ();
      The catch (Mongoconnectionexception $e) {$this->error = $e->getmessage ();
    return false;
      The catch (Mongocursortimeoutexception $e) {$this->error = $e->getmessage ();
    return false;
  return $result; }   

  /** * Find a record * * Parameters: * $table _name: Table name * $condition: Find condition * $fields: Get field * * return value: * Success: A record * failed:
    False */Public function FindOne ($table _name, $condition, $fields =array ()) {$dbname = $this->curr_db_name;
  return $this->mongo-> $dbname-> $table _name->findone ($condition, $fields); 
  /** * Get current error message * * Parameter: NO * * return value: Current error message/Public function GetError () {returns $this->error;
  /*** MongoDB Class * * Examples: * $mongo = new Hmongodb ("127.0.0.1:11223");
  * $mongo->selectdb ("test_db");
  * CREATE INDEX * $mongo->ensureindex ("test_table", Array ("id" =>1), Array (' unique ' =>true));
  * Get the record of the table * $mongo->count ("test_table");
  * Insert Record * $mongo->insert ("test_table", Array ("id" =>2, "title" => "Asdqw"));
  * Update record * $mongo->update ("test_table", Array ("id" =>1), Array ("id" =>1, "title" => "BBB")); * Update records-when they are present and added when they are not present-equivalent to set * $mongo->update ("test_table", Array ("id" =>1), Array ("ID" =&gt1, "title" => "BBB"), Array ("Upsert" =>1)); * Find Records * $mongo->find ("C", Array ("title" => "Asdqw"), Array ("Start" =>2, "Limit" =>2, "Sort" =>array ("id" =
  >1)) * Find a record * $mongo->findone ("$mongo->findone (" TTT ", Array (" id "=>1))", Array ("id" =>1));
  * Delete Record * $mongo->remove ("TTT", Array ("title" => "BBB"));
  * Delete Only one record * $mongo->remove ("TTT", Array ("title" => "BBB"), Array ("Justone" =>1));
  * Get the error message for the MONGO operation * $mongo->geterror (); */

}