mongodb分页skip+limit分页要先查出所有结果再去跳过，这样如果查询页面越往后效率越低。
如果能够通过查询条件查出每页结果的最后一条记录，在用最后一条记录作为查询条件去查下一页，这样每次都查询页面size条记录，效率不会差。
具体代码如下：包含mongodb.class.php， page.class.php， test.php
mongodb.class.php mongodb 操作类
复制代码 代码如下:
function show_error($message, $status_code = 500, $heading = 'An Error Was Encountered')
{
echo $message, $status_code,PHP_EOL;
exit;
}
//MongoDB操作类
class DB
{
private $CI;
private $config_file = 'MongoDB';
private $connection;
private $db;
private $connection_string;
private $collection = '';
private $host;
private $port;
private $user;
private $pass;
private $dbname;
private $key;
private $persist;
private $persist_key;
private $selects = array();
private $wheres = array();
private $sorts = array();
private $page_sorts = array();
private $limit = 999999;
private $offset = 0;
public function __construct($MONGODB_CONFIG)
{
if(!class_exists('Mongo'))
{
show_error("The MongoDB PECL extension has not been installed or enabled", 500);
}
$this->connection_string($MONGODB_CONFIG);
$this->connect();
}
public function switch_db($database = '')
{
if(empty($database))
{
show_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 $e)
{
show_error("Unable to switch Mongo Databases: {$e->getMessage()}", 500);
}
}
public function select($includes = array(), $excludes = array())
{
if(!is_array($includes))
{
$includes = array();
}
if(!is_array($excludes))
{
$excludes = array();
}
if(!empty($includes))
{
foreach($includes as $col)
{
$this->selects[$col] = 1;
}
}
else
{
foreach($excludes as $col)
{
$this->selects[$col] = 0;
}
}
return($this);
}
public function where($wheres = array())
{
foreach($wheres as $wh => $val)
{
$this->wheres[$wh] = $val;
}
return($this);
}
public function where_in($field = "", $in = array())
{
$this->where_init($field);
$this->wheres[$field]['$in'] = $in;
return($this);
}
public function where_not_in($field = "", $in = array())
{
$this->where_init($field);
$this->wheres[$field]['$nin'] = $in;
return($this);
}
public function where_gt($field = "", $x)
{
$this->where_init($field);
$this->wheres[$field]['$gt'] = $x;
return($this);
}
public function where_gte($field = "", $x)
{
$this->where_init($field);
$this->wheres[$field]['$gte'] = $x;
return($this);
}
public function where_lt($field = "", $x)
{
$this->where_init($field);
$this->wheres[$field]['$lt'] = $x;
return($this);
}
public function where_lte($field = "", $x)
{
$this->where_init($field);
$this->wheres[$field]['$lte'] = $x;
return($this);
}
public function where_between($field = "", $x, $y)
{
$this->where_init($field);
$this->wheres[$field]['$gte'] = $x;
$this->wheres[$field]['$lte'] = $y;
return($this);
}
public function where_between_ne($field = "", $x, $y)
{
$this->where_init($field);
$this->wheres[$field]['$gt'] = $x;
$this->wheres[$field]['$lt'] = $y;
return($this);
}
public function where_ne($field = "", $x)
{
$this->where_init($field);
$this->wheres[$field]['$ne'] = $x;
return($this);
}
public function where_or($field = "", $values)
{
$this->where_init($field);
$this->wheres[$field]['$or'] = $values;
return($this);
}
public function where_and( $elements_values = array() ) {
foreach ( $elements_values as $element => $val ) {
$this->wheres[$element] = $val;
}
return($this);
}
public function where_mod( $field, $num, $result ) {
$this->where_init($field);
$this->wheres[$field]['$mod'] = array ( $num, $result );
return($this);
}
public function where_size($field = "", $size = "")
{
$this->_where_init($field);
$this->wheres[$field]['$size'] = $size;
return ($this);
}
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 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($this);
}
public function limit($x = 99999) {
if($x !== NULL && is_numeric($x) && $x >= 1)
{
$this->limit = (int) $x;
}
return($this);
}
public function offset($x = 0)
{
if($x !== NULL && is_numeric($x) && $x >= 1)
{
$this->offset = (int) $x;
}
return($this);
}
public function get_where($collection = "", $where = array(), $limit = 99999)
{
return($this->where($where)->limit($limit)->get($collection));
}
public function get($collection = "")
{
if(empty($collection))
{
show_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);
}
public function count($collection = "")
{
if(empty($collection))
{
show_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);
}
private function insert_inc($table)
{
$update = array('$inc'=>array('id'=>1));
$query = array('table'=>$table);
$command = array(
'findandmodify'=>'_increase',
'update'=>$update,
'query'=>$query,
'new'=>true,
'upsert'=>true
);
$id = $this->db->command($command);
return $id['value']['id'];
}
public function insert($collection = "", $data = array()) {
if(empty($collection))
{
show_error("No Mongo collection selected to insert into", 500);
}
if(count($data) == 0 || !is_array($data))
{
show_error("Nothing to insert into Mongo collection or insert is not an array", 500);
}
try
{
$inc = $this->insert_inc($collection);
$data['_id'] = $inc;
$result = $this->db->{$collection}->insert($data, array('fsync' => TRUE));
if($result['ok'] || $result){
return true;
}
else{
return false;
}
}
catch(MongoCursorException $e)
{
show_error("Insert of data into MongoDB failed: {$e->getMessage()}", 500);
}
}
public function update($collection = "", $data = array(), $flage = false)
{
if(empty($collection))
{
show_error("No Mongo collection selected to update", 500);
}
if(count($data) == 0 || !is_array($data))
{
show_error("Nothing to update in Mongo collection or update is not an array", 500);
}
unset($data['_id']);
if($flage){
$arr = $this->wheres;
unset($arr['_id']);
if(is_array($arr)){
foreach($arr as $key => $w){
unset($data[$key]);
}
}
}
try
{
$res = $this->db->{$collection}->update($this->wheres, array('$set' => $data), array('fsync' => TRUE, 'multiple' => FALSE));
$this->clear();
return $res;
}
catch(MongoCursorException $e)
{
show_error("Update of data into MongoDB failed: {$e->getMessage()}", 500);
}
}
public function update_all($collection = "", $data = array()) {
if(empty($collection))
{
show_error("No Mongo collection selected to update", 500);
}
if(count($data) == 0 || !is_array($data))
{
show_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));
$this->clear();
return(TRUE);
}
catch(MongoCursorException $e)
{
show_error("Update of data into MongoDB failed: {$e->getMessage()}", 500);
}
}
public function delete($collection, $where)
{
if(empty($collection))
{
show_error("No Mongo collection selected to delete from", 500);
}
if(!$where){
show_error("No data input to delete", 500);
}
try
{
$this->wheres = $where;
$this->db->{$collection}->remove($this->wheres);
$this->clear();
return(TRUE);
}
catch(MongoCursorException $e)
{
show_error("Delete of data into MongoDB failed: {$e->getMessage()}", 500);
}
}
public function delete_all($collection = "")
{
if(empty($collection))
{
show_error("No Mongo collection selected to delete from", 500);
}
try
{
$this->db->{$collection}->remove($this->wheres, array('fsync' => TRUE, 'justOne' => FALSE));
$this->clear();
return(TRUE);
}
catch(MongoCursorException $e)
{
show_error("Delete of data into MongoDB failed: {$e->getMessage()}", 500);
}
}
public function add_index($collection = "", $keys = array(), $options = array())
{
if(empty($collection))
{
show_error("No Mongo collection specified to add index to", 500);
}
if(empty($keys) || !is_array($keys))
{
show_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
{
show_error("An error occured when trying to add an index to MongoDB Collection", 500);
}
}
public function remove_index($collection = "", $keys = array())
{
if(empty($collection))
{
show_error("No Mongo collection specified to remove index from", 500);
}
if(empty($keys) || !is_array($keys))
{
show_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
{
show_error("An error occured when trying to remove an index from MongoDB Collection", 500);
}
}
public function remove_all_indexes($collection = "") {
if(empty($collection))
{
show_error("No Mongo collection specified to remove all indexes from", 500);
}
$this->db->{$collection}->deleteIndexes();
$this->clear();
return($this);
}
public function list_indexes($collection = "") {
if(empty($collection))
{
show_error("No Mongo collection specified to remove all indexes from", 500);
}
return($this->db->{$collection}->getIndexInfo());
}
public function drop_collection($collection = "")
{
if(empty($collection))
{
show_error("No Mongo collection specified to drop from database", 500);
}
$this->db->{$collection}->drop();
return TRUE;
}
private function connect() {
$options = array();
if($this->persist === TRUE)
{
$options['persist'] = isset($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 $e)
{
show_error("Unable to connect to MongoDB: {$e->getMessage()}", 500);
}
}
private function connection_string($MONGODB_CONFIG)
{
$this->host = trim($MONGODB_CONFIG['HOST']);
$this->port = trim($MONGODB_CONFIG['PORT']);
$this->user = trim($MONGODB_CONFIG['USER']);
$this->pass = trim($MONGODB_CONFIG['PWD']);
$this->dbname = trim($MONGODB_CONFIG['DATAbase']);
$this->persist = trim($MONGODB_CONFIG['PERSIST']);
$this->persist_key = trim($MONGODB_CONFIG['PERSIST_KEY']);
$connection_string = "mongodb://";
if(empty($this->host))
{
show_error("The Host must be set to connect to MongoDB", 500);
}
if(empty($this->dbname))
{
show_error("The Database must be set to connect to MongoDB", 500);
}
if(!empty($this->user) && !empty($this->pass))
{
$connection_string .= "{$this->user}:{$this->pass}@";
}
if(isset($this->port) && !empty($this->port))
{
$connection_string .= "{$this->host}:{$this->port}/{$this->dbname}";
}
else
{
$connection_string .= "{$this->host}";
}
$this->connection_string = trim($connection_string);
}
private function clear()
{
$this->selects = array();
$this->wheres = array();
$this->limit = NULL;
$this->offset = NULL;
$this->sorts = array();
}
private function where_init($param)
{
if(!isset($this->wheres[$param]))
{
$this->wheres[$param] = array();
}
}
public function set_table($table){
$this->collection = $table;
}
public function get_table(){
return $this->collection;
}
public function set_orderby($orderby){
$this->page_sorts = $orderby;
}
public function get_left($left, $last, $size = PAGE_SIZE){
if($last){
$order = $this->nor_orderby();
if($this->page_sorts[$this->key] == -1){
$this->where_gt($this->key, $last);
} else {
$this->where_lt($this->key, $last);
}
return $this->limit($left * $size)->order_by($order)->get($this->collection);
}
}
public function get_right($right, $last, $size = PAGE_SIZE){
if($last){
if($this->page_sorts[$this->key] == -1){
$this->where_lte($this->key, $last);
} else {
$this->where_gte($this->key, $last);
}
}
return $this->limit($right * $size + 1)->order_by($this->page_sorts)->get($this->collection);
}
public function set_key($key){
$this->key = $key;
}
private function nor_orderby(){
foreach($this->page_sorts as $key => $order){
if($order == -1){
$orderby[$key] = 1;
}else{
$orderby[$key] = -1;
}
}
return $orderby;
}
public function get_prev($last, $size = PAGE_SIZE){
if($last){
if($this->page_sorts[$this->key] == 1){
$this->where_lt($this->key,$last)->order_by(array($this->key => -1));
} else {
$this->where_gt($this->key,$last)->order_by(array($this->key => 1));
}
$result = $this->limit($size)->get($this->collection);
}
return $result[$size - 1][$this->key];
}
public function get_next($last, $size = PAGE_SIZE){
if($last){
if($this->page_sorts[$this->key] == 1){
$this->where_gte($this->key,$last);
} else {
$this->where_lte($this->key,$last);
}
}
$result = $this->limit($size+1)->order_by($this->page_sorts)->get($this->collection);
return $result[$size][$this->key];
}
public function get_last($size = PAGE_SIZE){
$res = $this->count($this->collection) % $size;
$order = $this->nor_orderby();
if($res > 0){
$result = $this->limit($res)->order_by($order)->get($this->collection);
return $result[$res - 1][$this->key];
}else{
$result = $this->limit($size)->order_by($order)->get($this->collection);
return $result[$size - 1][$this->key];
}
}
public function page_query($last, $size = PAGE_SIZE){
if($last){
if($this->page_sorts[$this->key]==1){
$this->where_gte($this->key,$last);
} else {
$this->where_lte($this->key,$last);
}
}
return $this->limit($size)->order_by($this->page_sorts)->get($this->collection);
}
public function execute_insert($collection,$code){
//将二维数组分成js格式
$strcode='';
foreach($code as $k=>$v){
foreach($v as $kk=>$vv){
$strcode.='db.getCollection("'.$collection.'").insert({ "'.$kk.'":"'.$vv.'" });';
}
}
// retrun array([ok]=>1);
return $this->db->execute($code);
}
}
?>
page.class.php mongodb分页逻辑类
复制代码 代码如下:
db = $DB;
$this->count = $this->db->count($this->db->get_table());
$url = SITE_ROOT.strtolower(CLASS_NAME).'/'.METHOD_NAME;
$this->url = $this->url ? $this->url : $url;
$set = $set ? $set : 5;
$this->set = $set;
$size = $size ? $size : PAGE_SIZE;
$this->size = $size;
$this->last = $last;
$this->prev = $DB->get_prev($this->last);
$this->next = $DB->get_next($this->last);
//$this->page = GET::UINT('page');
$this->page = $this->page ? $this->page : 1;
$this->total = @ceil($this->count / $this->size);
$this->key = $key;
$this->orderby = $orderby;
}
//输出分页链接
public function get_link(){
if($this->total != 1){
$this->get_first();
$this->get_prev();
$this->get_center();
$this->get_next();
$this->get_last();
$this->get_turnto();
}
if($this->link){
$this->link = $this->turnto.$this->link.'共'.number_format($this->total).'页 '.number_format($this->count).'条记录';
}
if($this->turnto){
$this->link .= '';
}
return $this->link;
}
//获取左边显示的个数
public function get_left(){
return $this->left = ($this->set - $this->page >= 0) ? ($this->page - 1) : $this->set;
}
//获取右边显示的个数
public function get_right(){
return $this->right = ($this->total - $this->page > $this->set) ? $this->set : ($this->total - $this->page);
}
//设置左边的结果集
public function set_left_result($left_result){
$this->leftresult = $left_result;
}
//设置右边的结果集
public function set_right_result($right_result){
$this->rightresult = $right_result;
}
//设置排序条件
public function set_orderby($orderby){
$this->orderby = $orderby;
}
//设置最后一页
public function set_last($last){
$this->lastd = $last;
}
//设置中间显示页码个数
public function set($set){
$this->set = $set;
}
//获取首页
private function get_first(){
if($this->page != 1){
if($this->total > 0){
$this->link.='首页';
}
}
}
//获取上一页
private function get_prev(){
if($this->prev){
$this->link.='上一页';
}
}
//中间显示
private function get_center(){
$start = ($this->page - $this->set) <= 0 ? 1 : ($this->page - $this->set);
$end = ($this->page + $this->set + 1 >= $this->total) ? $this->total + 1 : ($this->page + $this->set + 1);
$ii = $this->left;
$iii = 0;
//显示左边的
for($i = $start; $i < $end; $i++, $ii--, $iii++){
if($this->page == $i){
$this->link.=''.$i.'';
}else{
$the_id = $ii * $this->size - 1;
if($the_id > 0){
$this->link.=''.$i.'';
}else{
$the_id = ($iii - $this->left) * $this->size;
$this->link.=''.$i.'';
}
}
}
}
//获取下一页
private function get_next(){
if($this->next){
$this->link.='下一页';
}
}
//获取尾页
private function get_last(){
if($this->page != $this->total){
$this->link.='尾页';
}
}
//跳转到
private function get_turnto(){
$this->turnto = '
转到第 页';
}
//求反
public function nor_orderby(){
foreach($this->orderby as $key => $order){
if($order==-1){
$orderby[$key] = 1;
}else{
$orderby[$key] = -1;
}
}
return $orderby;
}
//设置key
public function set_key($key){
$this->key = $key;
}
//分页操作
public function show(){
$this->set_key($this->key);
$this->set_orderby($this->orderby);
$left = $this->get_left();
$right = $this->get_right();
$leftresult = $this->db->get_left($left, $this->last);
$rightresult = $this->db->get_right($right, $this->last);
$this->set_left_result($leftresult);
$this->set_right_result($rightresult);
$last = $this->db->get_last();
$this->set_last($last);
return $this->get_link();
}
}
?>
test.php 测试代码
复制代码 代码如下:
include "page.class.php";
include "mongodb.class.php";
define(PAGE_SIZE, 5);//每页大小
$config['HOST'] = '127.0.0.1';
$config['PORT'] = 20081; //mongodb端口
$config['DATAbase'] = 'domain';//mongodb数据库名
$config['USER'] = '';
$config['PWD'] = '';
$config['PERSIST'] = TRUE;
$DB = new DB($config);
$table = 'whois'; //mongodb collection名
$key = '_id';
$orderby = array($key => -1);
$DB->set_table($table);
$DB->set_key($key);
$DB->set_orderby($orderby);
$log = $DB->page_query($lastid,5);
$page = new Page($lastid, $key, $orderby);
echo $pager = $page->show();
?>
