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这期内容当中小编将会给大家带来有关php中怎么操作MongoDB类实例，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
1. MyMongo.php文件：
<?php
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.php配置文件：
<?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*/
3. MyMongoDemo.php文件：
<?php
include_once("MyMongo.php");
$conn = new MyMongo();
//删除所有记录
$conn->delete_all("blog");
//插入第一条记录
$value = array("name" => "小明", "age" => 25, "addr" => array("country" => "中国", "province" => "广西", "city" => "桂林"));
$conn->insert("blog", $value);
var_dump($conn->select(array("name", "age"))->get("blog"));
var_dump($conn->get("blog"));
/* End of MyMongoDemo.php */上述就是小编为大家分享的php中怎么操作MongoDB类实例了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注亿速云行业资讯频道。
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