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php实现的mongodb操作类实例

转载 作者：qq735679552 更新时间：2022-09-27 22:32:09 24 4
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本文实例讲述了php实现的mongodb操作类。分享给大家供大家参考。具体如下:

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<?php
/*
  * To change this template, choose Tools | Templates
  * and open the template in the editor.
  */
class mongo_db {
   private $config ;
   private $connection ;
   private $db ;
   private $connection_string ;
   private $host ;
   private $port ;
   private $user ;
   private $pass ;
   private $dbname ;
   private $persist ;
   private $persist_key ;
   private $selects = array ();
   private $wheres = array ();
   private $sorts = array ();
   private $limit = 999999;
   private $offset = 0;
   private $timeout = 200;
   private $key = 0;
   /**
   *
   * CONSTRUCTOR *
   *
   * Automatically check if the Mongo PECL extension has been
   installed/enabled.
   * Generate the connection string and establish a connection
   to the MongoDB.
   */
   public function __construct() {
     if ((IS_NOSQL != 1)){
       return ;
     }
     if (! class_exists ( 'Mongo' )) {
       //$this->error("The MongoDB PECL extension has not been installed or enabled", 500);
     }
     $configs =wxcity_base::load_config( "cache" , "mongo_db" );
     $num = count ( $configs [ 'connect' ]);
     $this ->timeout = trim( $configs [ 'timeout' ]);
     $keys = wxcity_base::load_config( 'double' );
     $this ->key = $keys [ 'mongo_db' ];
     $this ->config = $configs [ 'connect' ][ $this ->key];
     $status = $this ->connect();
     if ( $status == false)
     {
       for ( $i = 1; $i < $num ; $i ++)
       {
         $n = $this ->key + $i ;
         $key = $n >= $num ? $n - $num : $n ;
         $this ->config = $configs [ 'connect' ][ $key ];
         $status = $this ->connect();
         if ( $status !=false)
         {
           $keys [ 'mongo_db' ] = $key ;
           $this ->key = $key ;
           $data = "<?php\nreturn " .var_export( $keys , true). ";\n?>" ;
           file_put_contents (WHTY_PATH. 'configs/double.php' , $data , LOCK_EX);
           break ;
         }
       }
     }
     if ( $status ==false)
     {
       die ( 'mongoDB not connect' );
     }
   }
   function __destruct() {
     if ((IS_NOSQL != 1)){
       return ;
     }
     if ( $this ->connection)
     {
       $this ->connection->close();
     }
   }
     /**
  *
  * CONNECT TO MONGODB  *
  *
  * Establish a connection to MongoDB using
  the connection string generated in
  * the connection_string() method.
  If 'mongo_persist_key' was set to true in the 
  * config file, establish a persistent connection.
  We allow for only the 'persist'
  * option to be set because we want to
  establish a connection immediately.
  */
   private function connect() {
     $this ->connection_string();
     $options = array ( 'connect' =>true, 'timeout' => $this ->timeout);
     try {
       $this ->connection = new Mongo( $this ->connection_string, $options );
       $this ->db = $this ->connection->{ $this ->dbname};
       return ( $this );
     } catch (MongoConnectionException $e ) {
       return false;
     }
   }
   /**
   *
   * BUILD CONNECTION STRING *
   *
   * Build the connection string from the config file.
   */
   private function connection_string() {
     $this ->host = trim( $this ->config[ 'hostname' ]);
     $this ->port = trim( $this ->config[ 'port' ]);
     $this ->user = trim( $this ->config[ 'username' ]);
     $this ->pass = trim( $this ->config[ 'password' ]);
     $this ->dbname = trim( $this ->config[ 'database' ]);
     $this ->persist = trim( $this ->config[ 'autoconnect' ]);
     $this ->persist_key = trim( $this ->config[ 'mongo_persist_key' ]);
     $connection_string = "mongodb://" ;
     if (emptyempty( $this ->host)) {
       $this ->error( "The Host must be set to connect to MongoDB" , 500);
     } if (emptyempty( $this ->dbname)) {
       $this ->error( "The Database must be set to connect to MongoDB" , 500);
     } if (!emptyempty( $this ->user) && !emptyempty( $this ->pass)) {
       $connection_string .= "{$this->user}:{$this->pass}@" ;
     } if (isset( $this ->port) && !emptyempty( $this ->port)) {
       $connection_string .= "{$this->host}:{$this->port}" ;
     } else {
       $connection_string .= "{$this->host}" ;
     } $this ->connection_string = trim( $connection_string );
   }
   /**
   *
   * Switch_db  *
   *
   * Switch from default database to a different db
   */
   public function switch_db( $database = '' ) {
     if (emptyempty( $database )) {
       $this ->error( "To switch MongoDB databases, a new database name must be specified" , 500);
     } $this ->dbname = $database ;
     try {
       $this ->db = $this ->connection->{ $this ->dbname};
       return (TRUE);
     } catch (Exception $e ) {
       $this ->error( "Unable to switch Mongo Databases: {$e->getMessage()}" , 500);
     }
   }
   /**
   *
   * SELECT FIELDS  *
   *
   * Determine which fields to include OR which to
   exclude during the query process.
   * Currently, including and excluding at
   the same time is not available, so the
   * $includes array will take precedence over
   the $excludes array.
   If you want to
   * only choose fields to exclude,
   leave $includes an empty array().
   *
   * @usage: $this->mongo_db->select(array('foo', 'bar'))->get('foobar');
   */
   public function select( $includes = array (), $excludes = array ()) {
     if (! is_array ( $includes )) {
       $includes = array ();
     }
     if (! is_array ( $excludes )) {
       $excludes = array ();
     }
     if (!emptyempty( $includes )) {
       foreach ( $includes as $col ) {
         $this ->selects[ $col ] = 1;
       }
     } else {
       foreach ( $excludes as $col ) {
         $this ->selects[ $col ] = 0;
       }
     } return ( $this );
   }
   /**
   *
   * WHERE PARAMETERS   *
   *
   * Get the documents based on these
   search parameters. The $wheres array should
   * be an associative array with the field
   as the key and the value as the search
   * criteria.  *
   * @usage = $this->mongo_db->where(array('foo' => 'bar'))->get('foobar');
   */
   public function where( $wheres = array ()) {
     foreach (( array ) $wheres as $wh => $val ) {
       $this ->wheres[ $wh ] = $val ;
     } return ( $this );
   }
   /**
   *
   * WHERE_IN PARAMETERS *
   *
   * Get the documents where the value
   of a $field is in a given $in array().
   *
   * @usage = $this->mongo_db->where_in('foo', array('bar', 'zoo', 'blah'))->get('foobar');
   */
   public function where_in( $field = "" , $in = array ()) {
     $this ->where_init( $field );
     $this ->wheres[ $field ][ '$in' ] = $in ;
     return ( $this );
   }
   /**
   *
   * WHERE_NOT_IN PARAMETERS *
   *
   * Get the documents where the value of
   a $field is not in a given $in array().
   *
   * @usage = $this->mongo_db->where_not_in('foo', array('bar', 'zoo', 'blah'))->get('foobar');
   */
   public function where_not_in( $field = "" , $in = array ()) {
     $this ->where_init( $field );
     $this ->wheres[ $field ][ '$nin' ] = $in ;
     return ( $this );
   }
   /**
   *
   * WHERE GREATER THAN PARAMETERS  *
   *
   * Get the documents where the value of
   a $field is greater than $x
   *
   * @usage = $this->mongo_db->where_gt('foo', 20);
   */
   public function where_gt( $field = "" , $x ) {
     $this ->where_init( $field );
     $this ->wheres[ $field ][ '$gt' ] = $x ;
     return ( $this );
   }
   /**
   *
   * WHERE GREATER THAN OR EQUAL TO PARAMETERS  *
   *
   * Get the documents where the value of a $field is greater than or equal to $x
   *
   * @usage = $this->mongo_db->where_gte('foo', 20);
   */
   public function where_gte( $field = "" , $x ) {
     $this ->where_init( $field );
     $this ->wheres[ $field ][ '$gte' ] = $x ;
     return ( $this );
   }
   /**
   *
   * WHERE LESS THAN PARAMETERS  *
   *
   * Get the documents where the value of
   a $field is less than $x
   *
   * @usage = $this->mongo_db->where_lt('foo', 20);
   */
   public function where_lt( $field = "" , $x ) {
     $this ->where_init( $field );
     $this ->wheres[ $field ][ '$lt' ] = $x ;
     return ( $this );
   }
   /**
   *
   * WHERE LESS THAN OR EQUAL TO PARAMETERS  *
   *
   * Get the documents where the value of
   a $field is less than or equal to $x
   *
   * @usage = $this->mongo_db->where_lte('foo', 20);
   */
   public function where_lte( $field = "" , $x ) {
     $this ->where_init( $field );
     $this ->wheres[ $field ][ '$lte' ] = $x ;
     return ( $this );
   }
   /**
   *
   * WHERE BETWEEN PARAMETERS   *
   *
   * Get the documents where the value of
   a $field is between $x and $y
   *
   * @usage = $this->mongo_db->where_between('foo', 20, 30);
   */
   public function where_between( $field = "" , $x , $y ) {
     $this ->where_init( $field );
     $this ->wheres[ $field ][ '$gte' ] = $x ;
     $this ->wheres[ $field ][ '$lte' ] = $y ;
     return ( $this );
   }
   /**
   *
   * WHERE BETWEEN AND NOT EQUAL TO PARAMETERS  *
   *
   * Get the documents where the value of
   a $field is between but not equal to $x and $y
   *
   * @usage = $this->mongo_db->where_between_ne('foo', 20, 30);
   */
   public function where_between_ne( $field = "" , $x , $y ) {
     $this ->where_init( $field );
     $this ->wheres[ $field ][ '$gt' ] = $x ;
     $this ->wheres[ $field ][ '$lt' ] = $y ;
     return ( $this );
   }
   /**
   *
   * WHERE NOT EQUAL TO PARAMETERS  *
   *
   * Get the documents where the value of
   a $field is not equal to $x
   *
   * @usage = $this->mongo_db->where_between('foo', 20, 30);
   */
   public function where_ne( $field = "" , $x ) {
     $this ->where_init( $field );
     $this ->wheres[ $field ][ '$ne' ] = $x ;
     return ( $this );
   }
   /**
   *
   * WHERE OR   *
   *
   * Get the documents where the value of
   a $field is in one or more values 
   *
   * @usage = $this->mongo_db->where_or('foo', array( 'foo', 'bar', 'blegh' );
   */
   public function where_or( $field = "" , $values ) {
     $this ->where_init( $field );
     $this ->wheres[ $field ][ '$or' ] = $values ;
     return ( $this );
   }
   /**
   *
   * WHERE AND  *
   *
   * Get the documents where the elements match
   the specified values *
   * @usage = $this->mongo_db->where_and( array ( 'foo' => 1, 'b' => 'someexample' );
   */
   public function where_and( $elements_values = array ()) {
     foreach (( array ) $elements_values as $element => $val ) {
       $this ->wheres[ $element ] = $val ;
     } return ( $this );
   }
   /**
   *
   * WHERE MOD  *
   *
   * Get the documents where $field % $mod = $result *
   * @usage = $this->mongo_db->where_mod( 'foo', 10, 1 );
   */
   public function where_mod( $field , $num , $result ) {
     $this ->where_init( $field );
     $this ->wheres[ $field ][ '$mod' ] = array ( $num , $result );
     return ( $this );
   }
   /**   *    *  Where size *    *  *  Get the documents where the size of a field is in a given $size int *  *  @usage : $this->mongo_db->where_size('foo', 1)->get('foobar'); */
   public function where_size( $field = "" , $size = "" ) {
     $this ->_where_init( $field );
     $this ->wheres[ $field ][ '$size' ] = $size ;
     return ( $this );
   }
   /**
   *
   * LIKE PARAMETERS *
   *
   * Get the documents where the (string) value of
   a $field is like a value. The defaults
   * allow for a case-insensitive search.   *
   * @param $flags 
   * Allows for the typical regular expression flags:
   *   i = case insensitive
   *   m = multiline
   *   x = can contain comments
   *   l = locale 
   *   s = dotall, "." matches everything, including newlines
   *   u = match unicode
   *
   * @param $enable_start_wildcard
   * If set to anything other than TRUE, a starting line character "^" will be prepended
   * to the search value, representing only searching for a value at the start of
   * a new line.
   *  * @param $enable_end_wildcard
   * If set to anything other than TRUE, an ending line character "$" will be appended
   * to the search value, representing only searching for a value at the end of
   * a line.
   *
   * @usage = $this->mongo_db->like('foo', 'bar', 'im', FALSE, TRUE);
   */
   public function like( $field = "" , $value = "" , $flags = "i" , $enable_start_wildcard = TRUE, $enable_end_wildcard = TRUE) {
     $field = (string) trim( $field );
     $this ->where_init( $field );
     $value = (string) trim( $value );
     $value = quotemeta( $value );
     if ( $enable_start_wildcard !== TRUE) {
       $value = "^" . $value ;
     } if ( $enable_end_wildcard !== TRUE) {
       $value .= "$" ;
     } $regex = "/$value/$flags" ;
     $this ->wheres[ $field ] = new MongoRegex( $regex );
     return ( $this );
   }
   public function wheres( $where ){
     $this ->wheres = $where ;
   }
   /**
   *
   * ORDER BY PARAMETERS *
   *
   * Sort the documents based on the parameters passed.
   To set values to descending order,
   * you must pass values of either -1, FALSE,
   'desc', or 'DESC', else they will be
   * set to 1 (ASC).
   *
   * @usage = $this->mongo_db->where_between('foo', 20, 30);
   */
   public function order_by( $fields = array ()) {
     if (! is_array ( $fields ) || ! count ( $fields )) return ;
     foreach ( $fields as $col => $val ) {
       if ( $val == -1 || $val === FALSE || strtolower ( $val ) == 'desc' ) {
         $this ->sorts[ $col ] = -1;
       } else {
         $this ->sorts[ $col ] = 1;
       }
     } return ( $this );
   }
   /**
   *
   * LIMIT DOCUMENTS *
   *
   * Limit the result set to $x number of documents  *
   * @usage = $this->mongo_db->limit($x);
   */
   public function limit( $x = 99999) {
     if ( $x !== NULL && is_numeric ( $x ) && $x >= 1) {
       $this ->limit = (int) $x ;
     } return ( $this );
   }
   /**
   *
   * OFFSET DOCUMENTS   *
   *
   * Offset the result set to skip $x number of documents
   *
   * @usage = $this->mongo_db->offset($x);
   */
   public function offset( $x = 0) {
     if ( $x !== NULL && is_numeric ( $x ) && $x >= 1) {
       $this ->offset = (int) $x ;
     } return ( $this );
   }
   /**
   *
   * GET_WHERE  *
   * 
   * Get the documents based upon the passed parameters  *
   * @usage = $this->mongo_db->get_where('foo', array('bar' => 'something'));
   */
   public function get_where( $collection = "" , $where = array (), $limit = 99999, $orderby = array ()) {
     if ( is_array ( $orderby ) || !emptyempty( $orderby )) {
       $order_by = $this ->order_by( $order_by );
     }
     return ( $this ->where( $where )->limit( $limit )->get( $collection ));
   }
   public function selectA( $collection = "" , $limit = 99999, $orderby = array ()) {
     if ( intval ( $limit )<1){
       $limit = 999999;
     }
     $order_by = $this ->order_by( $orderby );
     $re = $this ->limit( $limit )->get( $collection );
     $this ->clear();
     return ( array ) $re ;
   }
   public function listinfo( $collection = "" , $orderby = array (), $page =1, $pagesize =12) {
     $page = max( intval ( $page ), 1);
     $offset = $pagesize * ( $page - 1);
     $pagesizes = $offset + $pagesize ;
     $this ->offset( $offset );
     $order_by = $this ->order_by( $orderby );
     $re = $this ->limit( $pagesize )->get( $collection );
     $this ->limit(999999);
     $count = $this -> count ( $collection );
     $this ->pages = pages( $count , $page , $pagesize );
     return ( array ) $re ;
   }
   /**
   *
   * GET *
   *
   * Get the documents based upon the passed parameters  *
   * @usage = $this->mongo_db->get('foo', array('bar' => 'something'));
   */
   public function get( $collection = "" ) {
     if (emptyempty( $collection )) {
       $this ->error( "In order to retreive documents from MongoDB, a collection name must be passed" , 500);
     } $results = array ();
     $documents = $this ->db->{ $collection }->find( $this ->wheres, $this ->selects)->limit((int) $this ->limit)->skip((int) $this ->offset)->sort( $this ->sorts);
     $returns = array ();
     foreach ( $documents as $doc ): $returns [] = $doc ;
     endforeach ;
     return ( $returns );
   }
   public function getMy( $collection = "" ) {
     if (emptyempty( $collection )) {
       $this ->error( "In order to retreive documents from MongoDB, a collection name must be passed" , 500);
     } $results = array ();
     $documents = $this ->db->{ $collection }->find( $this ->wheres, $this ->selects)->limit((int) $this ->limit)->skip((int) $this ->offset)->sort( $this ->sorts);
     $returns = array ();
     foreach ( $documents as $doc ): $returns [] = $doc ;
     endforeach ;
     $this -> clear();
     return ( $returns );
   }
   /**
   *
   * COUNT  *
   *
   * Count the documents based upon the passed parameters *
   * @usage = $this->mongo_db->get('foo');
   */
   public function count ( $collection = "" ) {
     if (emptyempty( $collection )) {
       $this ->error( "In order to retreive a count of documents from MongoDB, a collection name must be passed" , 500);
     } $count = $this ->db->{ $collection }->find( $this ->wheres)->limit((int) $this ->limit)->skip((int) $this ->offset)-> count ();
     $this ->clear();
     return ( $count );
   }
   /**
   *
   * INSERT  *
   *
   * Insert a new document into the passed collection *
   * @usage = $this->mongo_db->insert('foo', $data = array());
   */
   public function insert( $collection = "" , $data = array (), $name = 'ID' ) {
     if (emptyempty( $collection )) {
       $this ->error( "No Mongo collection selected to insert into" , 500);
     } if ( count ( $data ) == 0 || ! is_array ( $data )) {
       $this ->error( "Nothing to insert into Mongo collection or insert is not an array" , 500);
     } try {
     /**
       wxcity_base::load_sys_class('whtysqs','',0);
       $mongoseq_class = new whtysqs('creaseidsqs');
       $re = $mongoseq_class->query("?name=" . $collection . "&opt=put&data=1");
     **/
       $re = put_sqs( 'list_mongo_creaseidsqs' , '1' );
       if ( is_numeric ( $re )){
         $re ++;
         $data [ $name ] = intval ( $re );
       } else {
         $data [ $name ] = intval (time());
         //die('mongosqs error');
       }
       $this ->db->{ $collection }->insert( $data , array ( 'fsync' => TRUE));
       $this ->clear();
       return $data [ $name ];
     } catch (MongoCursorException $e ) {
       $this ->error( "Insert of data into MongoDB failed: {$e->getMessage()}" , 500);
     }
   }
   public function insertWithId( $collection = "" , $data = array ()) {
     if (emptyempty( $collection )) {
       $this ->error( "No Mongo collection selected to insert into" , 500);
     } if ( count ( $data ) == 0 || ! is_array ( $data )) {
       $this ->error( "Nothing to insert into Mongo collection or insert is not an array" , 500);
     } try {
       $this ->db->{ $collection }->insert( $data , array ( 'fsync' => TRUE));
       $this ->clear();
       return 1;
     } catch (MongoCursorException $e ) {
       $this ->error( "Insert of data into MongoDB failed: {$e->getMessage()}" , 500);
     }
   }
   /**
   *
   * UPDATE  *
   *
   * Update a document into the passed collection *
   * @usage = $this->mongo_db->update('foo', $data = array());
   */
   public function update( $collection = "" , $data = array ()) {
     if (emptyempty( $collection )) {
       $this ->error( "No Mongo collection selected to update" , 500);
     } if ( count ( $data ) == 0 || ! is_array ( $data )) {
       $this ->error( "Nothing to update in Mongo collection or update is not an array" , 500);
     } try {
       $this ->db->{ $collection }->update( $this ->wheres, array ( '$set' => $data ), array ( 'fsync' => TRUE, 'multiple' => FALSE));
       $this ->clear();
       return (TRUE);
     } catch (MongoCursorException $e ) {
       $this ->error( "Update of data into MongoDB failed: {$e->getMessage()}" , 500);
     }
   }
   /**
   *
   * UPDATE_ALL  *
   *
   * Insert a new document into the passed collection *
   * @usage = $this->mongo_db->update_all('foo', $data = array());
   */
   public function update_all( $collection = "" , $data = array ()) {
     if (emptyempty( $collection )) {
       $this ->error( "No Mongo collection selected to update" , 500);
     } if ( count ( $data ) == 0 || ! is_array ( $data )) {
       $this ->error( "Nothing to update in Mongo collection or update is not an array" , 500);
     } try {
       $this ->db->{ $collection }->update( $this ->wheres, array ( '$set' => $data ), array ( 'fsync' => TRUE, 'multiple' => TRUE));
       return (TRUE);
     } catch (MongoCursorException $e ) {
       $this ->error( "Update of data into MongoDB failed: {$e->getMessage()}" , 500);
     }
   }
   /**
   *
   * DELETE  *
   *
   * delete document from the passed collection based upon certain criteria *
   * @usage = $this->mongo_db->delete('foo', $data = array());
   */
   public function delete ( $collection = "" ) {
     if (emptyempty( $collection )) {
       $this ->error( "No Mongo collection selected to delete from" , 500);
     } try {
       $this ->db->{ $collection }->remove( $this ->wheres, array ( 'fsync' => TRUE, 'justOne' => TRUE));
       $this ->clear();
       return (TRUE);
     } catch (MongoCursorException $e ) {
       $this ->error( "Delete of data into MongoDB failed: {$e->getMessage()}" , 500);
     }
   }
   /**
   *
   * DELETE_ALL  *
   *
   * Delete all documents from the passed collection based upon certain criteria
   *
   * @usage = $this->mongo_db->delete_all('foo', $data = array());
   */
   public function delete_all( $collection = "" ) {
     if (emptyempty( $collection )) {
       $this ->error( "No Mongo collection selected to delete from" , 500);
     } try {
       $this ->db->{ $collection }->remove( $this ->wheres, array ( 'fsync' => TRUE, 'justOne' => FALSE));
       return (TRUE);
     } catch (MongoCursorException $e ) {
       $this ->error( "Delete of data into MongoDB failed: {$e->getMessage()}" , 500);
     }
   }
   /**
   *
   * ADD_INDEX  *
   *
   * Ensure an index of the keys in a collection with optional parameters.
   To set values to descending order,
   * you must pass values of either -1, FALSE, 'desc', or 'DESC', else they will be
   * set to 1 (ASC). *
   * @usage = $this->mongo_db->add_index($collection, array('first_name' => 'ASC', 'last_name' => -1), array('unique' => TRUE));
   */
   public function add_index( $collection = "" , $keys = array (), $options = array ()) {
     if (emptyempty( $collection )) {
       $this ->error( "No Mongo collection specified to add index to" , 500);
     } if (emptyempty( $keys ) || ! is_array ( $keys )) {
       $this ->error( "Index could not be created to MongoDB Collection because no keys were specified" , 500);
     } foreach ( $keys as $col => $val ) {
       if ( $val == -1 || $val === FALSE || strtolower ( $val ) == 'desc' ) {
         $keys [ $col ] = -1;
       } else {
         $keys [ $col ] = 1;
       }
     } if ( $this ->db->{ $collection }->ensureIndex( $keys , $options ) == TRUE) {
       $this ->clear();
       return ( $this );
     } else {
       $this ->error( "An error occured when trying to add an index to MongoDB Collection" , 500);
     }
   }
   /**
   *
   * REMOVE_INDEX   *
   *
   * Remove an index of the keys in a collection.
   To set values to descending order,
   * you must pass values of either -1, FALSE, 'desc', or 'DESC', else they will be
   * set to 1 (ASC). *
   * @usage = $this->mongo_db->remove_index($collection, array('first_name' => 'ASC', 'last_name' => -1));
   */
   public function remove_index( $collection = "" , $keys = array ()) {
     if (emptyempty( $collection )) {
       $this ->error( "No Mongo collection specified to remove index from" , 500);
     } if (emptyempty( $keys ) || ! is_array ( $keys )) {
       $this ->error( "Index could not be removed from MongoDB Collection because no keys were specified" , 500);
     } if ( $this ->db->{ $collection }->deleteIndex( $keys , $options ) == TRUE) {
       $this ->clear();
       return ( $this );
     } else {
       $this ->error( "An error occured when trying to remove an index from MongoDB Collection" , 500);
     }
   }
   /**
   *
   * REMOVE_ALL_INDEXES  *
   *
   * Remove all indexes from a collection. *
   * @usage = $this->mongo_db->remove_all_index($collection);
   */
   public function remove_all_indexes( $collection = "" ) {
     if (emptyempty( $collection )) {
       $this ->error( "No Mongo collection specified to remove all indexes from" , 500);
     } $this ->db->{ $collection }->deleteIndexes();
     $this ->clear();
     return ( $this );
   }
   /**
   *
   * LIST_INDEXES   *
   *
   * Lists all indexes in a collection. *
   * @usage = $this->mongo_db->list_indexes($collection);
   */
   public function list_indexes( $collection = "" ) {
     if (emptyempty( $collection )) {
       $this ->error( "No Mongo collection specified to remove all indexes from" , 500);
     } return ( $this ->db->{ $collection }->getIndexInfo());
   }
   /**
   *
   * DROP COLLECTION *
   *
   * Removes the specified collection from the database.
   Be careful because this
   * can have some very large issues in production!
   */
   public function drop_collection( $collection = "" ) {
     if (emptyempty( $collection )) {
       $this ->error( "No Mongo collection specified to drop from database" , 500);
     } $this ->db->{ $collection }->drop();
     return TRUE;
   }
   /**
   *
   * CLEAR  *
   *
   * Resets the class variables to default settings
   */
   private function clear() {
     $this ->selects = array ();
     $this ->wheres = array ();
     $this ->limit = NULL;
     $this ->offset = NULL;
     $this ->sorts = array ();
   }
   /**
   *
   * WHERE INITIALIZER  *
   *
   * Prepares parameters for insertion in $wheres array().
   */
   private function where_init( $param ) {
     if (!isset( $this ->wheres[ $param ])) {
       $this ->wheres[ $param ] = array ();
     }
   }
   public function error( $str , $t ) {
     echo $str ;
     exit ;
   }
}
?>

使用范例:

?
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$table_name =trim( strtolower ( $this ->table_name));
$this ->mongo_db->where( $where );
$order =!emptyempty( $order )? array ( 'AID' => 'DESC' ): array ( 'AID' => 'ASC' );
//升序降序
$infos = $this ->mongo_db->listinfo( $table_name , $order , $page , $pagesize );

希望本文所述对大家的php程序设计有所帮助.

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