Cet article présente principalement la méthode d'utilisation de PHP pour faire fonctionner la classe MongoDB. L'exemple analyse la classe MongoDB implémentée après CI et ses techniques de fonctionnement. Les amis dans le besoin peuvent s'y référer
L'exemple de cet article. donne l'exemple d'exploitation de la classe MongoDB dans la méthode PHP. Partagez-le avec tout le monde pour votre référence. Les détails sont les suivants :
1. Fichier MyMongo.php :
<?php
/**
* 仿写CI的MongoDB
* @author sparkHuang 2011-11-03
*
*/
class MyMongo {
private $mongo_config = "mongo_config.php";
private $connection;
private $db;
private $mongo_connect_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;
public function construct() {
if ( ! class_exists('Mongo')) {
$this->log_error("The MongoDB PECL extentiosn has not been installed or enabled.");
exit;
}
$this->connection_string();
$this->connect();
}
/**
* 更改数据库
*
*/
public function switch_db($database = '') {
if (empty($database)) {
$this->log_error("To switch MongoDB databases, a new database name must be specified");
exit;
}
$this->dbname = $database;
try {
$this->db = $this->connection->{$this->dbname};
return true;
} catch(Exception $e) {
$this->log_error("Unable to switch Mongo Databases: {$e->getMessage()}");
exit;
}
}
/**
* 设置select字段
*
*/
public function select($includs = array(), $excludes = array()) {
if ( ! is_array($includs)) {
$includs = (array)$includs;
}
if ( ! is_array($excludes)) {
$excludes = (array)$excludes;
}
if ( ! empty($includs)) {
foreach ($includs as $col) {
$this->selects[$col] = 1;
}
} else {
foreach ($excludes as $col) {
$this->selects[$col] = 0;
}
}
return($this);
}
/**
* where条件查询判断
*
* @usage = $this->mongo_db->where(array('foo' => 'bar'))->get('foobar');
*
*/
public function where($wheres = array()) {
if ( ! is_array($wheres)) {
$wheres = (array)$wheres;
}
if ( ! empty($wheres)) {
foreach($wheres as $wh => $val) {
$this->wheres[$wh] = $val;
}
}
return($this);
}
/**
* where ... in .. 条件查询判断
*
* @usage = $this->mongo_db->where_in('foo', array('bar', 'zoo'))->get('foobar');
*
*/
public function where_in($field = '', $in = array()) {
$this->where_init($field);
$this->wheres[$field]['$in'] = $in;
return($this);
}
/**
* where ... not in .. 条件查询判断
*
* @usage = $this->mongo_db->where_not_in('foo', array('bar', 'zoo'))->get('foobar');
*
*/
public function where_not_in($field = '', $in = array()) {
$this->where_init($field);
$this->wheres[$field]['$nin'] = $in;
return($this);
}
/**
* where ... $field > $x .. 条件查询判断
*
* @usage = $this->mongo_db->where_gt('foo', 20)->get('foobar');
*
*/
public function where_gt($field = '', $x) {
$this->where_init($field);
$this->wheres[$field]['$gt'] = $x;
return($this);
}
/**
* where ... $field >= $x .. 条件查询判断
*
* @usage = $this->mongo_db->where_gte('foo', 20)->get('foobar');
*
*/
public function where_gte($field = '', $x) {
$this->where_init($field);
$this->wheres[$field]['$gte'] = $x;
return($this);
}
/**
* where ... $field < $x .. 条件查询判断
*
* @usage = $this->mongo_db->where_lt('foo', 20)->get('foobar');
*
*/
public function where_lt($field = '', $x) {
$this->where_init($field);
$this->wheres[$field]['$lt'] = $x;
return($this);
}
/**
* where ... $field <= $x .. 条件查询判断
*
* @usage = $this->mongo_db->where_lte('foo', 20)->get('foobar');
*
*/
public function where_lte($field = '', $x) {
$this->where_init($field);
$this->wheres[$field]['$lte'] = $x;
return($this);
}
/**
* where ... $field >= $x AND $field <= $y .. 条件查询判断
*
* @usage = $this->mongo_db->where_between('foo', 20, 30)->get('foobar');
*
*/
public function where_between($field = '', $x, $y) {
$this->where_init($field);
$this->wheres[$field]['$gte'] = $x;
$this->wheres[$field]['$lte'] = $y;
return($this);
}
/**
* where ... $field > $x AND $field < $y .. 条件查询判断
*
* @usage = $this->mongo_db->where_between_ne('foo', 20, 30)->get('foobar');
*
*/
public function where_between_ne($field = '', $x, $y) {
$this->where_init($field);
$this->wheres[$field]['$gt'] = $x;
$this->wheres[$field]['$lt'] = $y;
return($this);
}
/**
* where ... $field <> $x .. 条件查询判断
*
* @usage = $this->mongo_db->where_ne('foo', 20)->get('foobar');
*
*/
public function where_ne($field = '', $x) {
$this->where_init($field);
$this->wheres[$field]['$ne'] = $x;
return($this);
}
/**
* where ... or .. 条件查询判断
*
* @usage = $this->mongo_db->where_or('foo', array('foo', 'bar'))->get('foobar');
*
*/
public function where_or($field = '', $values) {
$this->where_init($field);
$this->wheres[$field]['$or'] = $values;
return($this);
}
/**
* where ... and .. 条件查询判断
*
* @usage = $this->mongo_db->where_and( array ( 'foo' => 1, 'b' => 'someexample' );
*/
public function where_and( $elements_values = array() ) {
foreach ( $elements_values as $element => $val ) {
$this->wheres[$element] = $val;
}
return($this);
}
/**
* where $field % $num = $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条件查询(PHP中定义MongoRegex类实现)
*
* @usage : $this->mongo_db->like('foo', 'bar', 'im', false, false)->get();
*/
public function like($field = "", $value = "", $flags = "i", $enable_start_wildcard = true, $enable_end_wildcard = true) {
$field = (string)$field;
$this->where_init($field);
$value = (string)$value;
$value = quotmeta($value);
if (true !== $enable_start_wildcard) {
$value = "^".$value;
}
if (true !== $enable_end_wildcard) {
$value .= "$";
}
$regex = "/$value/$flags";
$this->wheres[$field] = new MongoRegex($regex);
return($this);
}
/**
* order排序( 1 => ASC, -1 => DESC)
*
* @usage: $this->mongo_db->get_where('foo', array('name' => 'tom'))->order_by(array("age" => 1));
*/
public function order_by($fields = array()) {
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
*
* @usage: $this->mongo_db->get_where('foo', array('name' => 'tom'))->limit(10);
*/
public function limit($x = 999999) {
if ($x !== NULL && is_numeric($x) && $x >= 1) {
$this->limit = (int)$x;
}
return($this);
}
/**
* offset
*
* @usage: $this->mongo_db->get_where('foo', array('name' => 'tom'))->offset(10);
*/
public function offset($x = 0) {
if($x !== NULL && is_numeric($x) && $x >= 1) {
$this->offset = (int) $x;
}
return($this);
}
/**
* get_where
*
* @usage: $this->mongo_db->get_where('foo', array('bar' => 'something'));
*/
public function get_where($collection = "", $where = array(), $limit = 999999) {
return($this->where($where)->limit($limit)->get($collection));
}
/**
* get
*
* @usage: $this->mongo_db->where(array('name' => 'tom'))->get('foo');
*/
public function get($collection) {
if (empty($collection)) {
$this->log_error("In order to retreive documents from MongoDB, a collection name must be passed");
exit;
}
$results = array();
$results = $this->db->{$collection}->find($this->wheres, $this->selects)->limit((int)$this->limit)->skip((int)$this->offset)->sort($this->sorts);
$returns = array();
foreach($results as $result) {
$returns[] = $result;
}
$this->clear();
return($returns);
}
/**
* count
*
* @usage: $this->db->get_where('foo', array('name' => 'tom'))->count('foo');
*/
public function count($collection) {
if (empty($collection)) {
$this->log_error("In order to retreive documents from MongoDB, a collection name must be passed");
exit;
}
$count = $this->db->{$collection}->find($this->wheres)->limit((int)$this->limit)->skip((int)$this->offset)->count();
$this->clear();
return($count);
}
/**
* insert
*
* @usage: $this->mongo_db->insert('foo', array('name' => 'tom'));
*/
public function insert($collection = "", $data = array()) {
if (empty($collection)) {
$this->log_error("No Mongo collection selected to delete from");
exit;
}
if (count($data) == 0 || ! is_array($data)) {
$this->log_error("Nothing to insert into Mongo collection or insert is not an array");
exit;
}
try {
$this->db->{$collection}->insert($data, array('fsync' => true));
if (isset($data['_id'])) {
return($data['_id']);
} else {
return(false);
}
} catch(MongoCursorException $e) {
$this->log_error("Insert of data into MongoDB failed: {$e->getMessage()}");
exit;
}
}
/**
* update : 利用MongoDB的 $set 实现
*
* @usage : $this->mongo_db->where(array('name' => 'tom'))->update('foo', array('age' => 24))
*/
public function update($collection = "", $data = array()) {
if (empty($collection)) {
$this->log_error("No Mongo collection selected to delete from");
exit;
}
if (count($data) == 0 || ! is_array($data)) {
$this->log_error("Nothing to update in Mongo collection or update is not an array");
exit;
}
try {
$this->db->{$collection}->update($this->wheres, array('$set' => $data), array('fsync' => true, 'multiple' => false)); //注意: multiple为false
return(true);
} catch(MongoCursorException $e) {
$this->log_error("Update of data into MongoDB failed: {$e->getMessage()}");
exit;
}
}
/**
* update_all : 利用MongoDB的 $set 实现
*
* @usage : $this->mongo_db->where(array('name' => 'tom'))->update_all('foo', array('age' => 24));
*/
public function update_all($collection = "", $data = array()) {
if (empty($collection)) {
$this->log_error("No Mongo collection selected to delete from");
exit;
}
if (count($data) == 0 || ! is_array($data)) {
$this->log_error("Nothing to update in Mongo collection or update is not an array");
exit;
}
try {
$this->db->{$collection}->update($this->wheres, array('$set' => $data), array('fsync' => true, 'multiple' => true)); //注意: multiple为true
return(true);
} catch(MongoCursorException $e) {
$this->log_error("Update of data into MongoDB failed: {$e->getMessage()}");
exit;
}
}
/**
* delete
*
* @usage : $this->mongo_db->where(array('name' => 'tom'))->delete('foo');
*/
public function delete($collection = "") {
if (empty($collection)) {
$this->log_error("No Mongo collection selected to delete from");
exit;
}
try {
$this->db->{$collection}->remove($this->wheres, array('fsync' => true, 'justOne' => true)); //注意justOne为true;
} catch(MongoCursorException $e) {
$this->log_error("Delete of data into MongoDB failed: {$e->getMessage()}");
exit;
}
}
/**
* delete_all
*
* @usage : $this->mongo_db->where(array('name' => 'tom'))->delete_all('foo');
*/
public function delete_all($collection = "") {
if (empty($collection)) {
$this->log_error("No Mongo collection selected to delete from");
exit;
}
try {
$this->db->{$collection}->remove($this->wheres, array('fsync' => true, 'justOne' => false)); //注意justOne为false;
} catch(MongoCursorException $e) {
$this->log_error("Delete of data into MongoDB failed: {$e->getMessage()}");
exit;
}
}
/**
* add_index
*
* @usage : $this->mongo_db->add_index('foo', array('first_name' => 'ASC', 'last_name' => -1), array('unique' => true)));
*/
public function add_index($collection, $keys = array(), $options = array()) {
if (empty($collection)) {
$this->log_error("No Mongo collection specified to add index to");
exit;
}
if (empty($keys) || ! is_array($keys)) {
$this->log_error("Index could not be created to MongoDB Collection because no keys were specified");
exit;
}
foreach($keys as $col => $val) {
if ($val == -1 || $val == false || strtolower($val) == 'desc') {
$keys[$col] = -1;
} else {
$keys[$col] = 1;
}
}
//在此没有对$options数组的有效性进行验证
if (true == $this->db->{$collection}->ensureIndex($keys, $options)) {
$this->clear();
return($this);
} else {
$this->log_error("An error occured when trying to add an index to MongoDB Collection");
exit;
}
}
/**
* remove_index
*
* @usage : $this->mongo_db->remove_index('foo', array('first_name' => 'ASC', 'last_name' => -1))
*/
public function remove_index($collection = "", $keys = array()) {
if (empty($collection)) {
$this->log_error("No Mongo collection specified to add index to");
exit;
}
if (empty($keys) || ! is_array($keys)) {
$this->log_error("Index could not be created to MongoDB Collection because no keys were specified");
exit;
}
if ($this->db->{$collection}->deleteIndex($keys)) {
$this->clear();
return($this);
} else {
$this->log_error("An error occured when trying to add an index to MongoDB Collection");
exit;
}
}
/**
* remove_all_index
*
* @usage : $this->mongo_db->remove_all_index('foo', array('first_name' => 'ASC', 'last_name' => -1))
*/
public function remove_all_index($collection = "", $keys = array()) {
if (empty($collection)) {
$this->log_error("No Mongo collection specified to add index to");
exit;
}
if (empty($keys) || ! is_array($keys)) {
$this->log_error("Index could not be created to MongoDB Collection because no keys were specified");
exit;
}
if ($this->db->{$collection}->deleteIndexes($keys)) {
$this->clear();
return($this);
} else {
$this->log_error("An error occured when trying to add an index to MongoDB Collection");
exit;
}
}
/**
* list_indexes
*
* @usage : $this->mongo_db->list_indexes('foo');
*/
public function list_indexes($collection = "") {
if (empty($collection)) {
$this->log_error("No Mongo collection specified to add index to");
exit;
}
return($this->db->{$collection}->getIndexInfo());
}
/**
* drop_collection
*
* @usage : $this->mongo_db->drop_collection('foo');
*/
public function drop_collection($collection = "") {
if (empty($collection)) {
$this->log_error("No Mongo collection specified to add index to");
exit;
}
$this->db->{$collection}->drop();
return(true);
}
/**
* 生成连接MongoDB 参数字符串
*
*/
private function connection_string() {
include_once($this->mongo_config);
$this->host = trim($config['host']);
$this->port = trim($config['port']);
$this->user = trim($config['user']);
$this->pass = trim($config['pass']);
$this->dbname = trim($config['dbname']);
$this->persist = trim($config['persist']);
$this->persist_key = trim($config['persist_key']);
$connection_string = "mongodb://";
if (empty($this->host)) {
$this->log_error("The Host must be set to connect to MongoDB");
exit;
}
if (empty($this->dbname)) {
$this->log_error("The Database must be set to connect to MongoDB");
exit;
}
if ( ! empty($this->user) && ! empty($this->pass)) {
$connection_string .= "{$this->user}:{$this->pass}@";
}
if ( isset($this->port) && ! empty($this->port)) {
$connection_string .= "{$this->host}:{$this->port}";
} else {
$connection_string .= "{$this->host}";
}
$this->connection_string = trim($connection_string);
}
/**
* 连接MongoDB 获取数据库操作句柄
*
*/
private function connect() {
$options = array();
if (true === $this->persist) {
$options['persist'] = isset($this->persist_key) && ! empty($this->persist_key) ? $this->persist_key : "ci_mongo_persist";
}
try {
$this->connection = new Mongo($this->connection_string, $options);
$this->db = $this->connection->{$this->dbname};
return ($this);
} catch (MongoConnectionException $e) {
$this->log_error("Unable to connect to MongoDB: {$e->getMessage()}");
}
}
/**
* 初始化清理部分成员变量
*
*/
private function clear() {
$this->selects = array();
$this->wheres = array();
$this->limit = NULL;
$this->offset = NULL;
$this->sorts = array();
}
/**
* 依据字段名初始化处理$wheres数组
*
*/
private function where_init($param) {
if ( ! isset($this->wheres[$param])) {
$this->wheres[$param] = array();
}
}
/**
* 错误记录
*
*/
private function log_error($msg) {
$msg = "[Date: ".date("Y-m-i H:i:s")."] ".$msg;
@file_put_contents("./error.log", print_r($msg."\n", true), FILE_APPEND);
}
}
/* End of MyMongo.php */2. mongo_config.phpFichier de configuration :
<?php $config["host"] = "localhost"; $config["user"] = ""; $config["pass"] = ""; $config["port"] = 27017; $config["dbname"] = "test"; $config['persist'] = TRUE; $config['persist_key'] = 'ci_mongo_persist'; /*End of mongo_config.php*/
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