PHP操作MongoDB数据库具体样例介绍（增、删、改、查） （六）

php
$conn = new Mongo("mongodb://user1:123456@localhost:27017/test"); //用户授权链接mongodb test数据库
$db = $conn->test;
?>

find.php
<?php
include "conn.php";
$c1 = $db->c1;    //操作c1集合

//因为php里面不能直接用json
//db.c1.find({name:"user1"});   不能这么玩
//{name:"user1"} == array("name"=>"user1")   用这样的形式
//[1,2] == array(1,2);
//{} == array()

$arr=array();
$rst = $c1->find($arr);
foreach($rst as $val){
echo "<pre>";
print_r($val[‘name‘]);  //取id的话  得"_id"
}


样例2：指定值查询
$arr = array("name"=>"user1");  //查询nam=user1的
$rst = $c1->find($arr);
foreach($rst as $val){
echo "<pre>";
$fis = $val[‘_id‘];
print_r($val);  
echo "<a href=‘user.php?

fid={$fid}‘></a>";   //你会发现fid传到user.php的时候变成字符串了。怎么解决？
//user.php   依据_id查mongodb相应的数据
<?php
include "conn.php";
$c1 = $db->c1;
$oid= new MongoId($_GET[‘fid‘]); 用这个转一下
var_dump($oid);  //还是Object,不转的话就是string类型

$arr = array("_id"=>"$oid");  
$rst = $c1->find($arr);
foreach($rst as $val){
echo "<pre>";
print_r($val); 
}
?>
}


样例3：添加
include "conn.php";
$c1 = $db->c1;
//db.c1.insert({"name"=>"user3",age:30,"sex"=>"nan"});
$arr = array("name"=>"user3","age"=>30,"sex"=>"nan");
if($c1->insert($arr))
echo ‘成功‘;
else
echo ‘失败‘;




样例4：删
include "conn.php";
$c1 = $db->c1;
//db.c1.remove({"name"=>"user2"});
$arr = array("name"=>"user2");
if($c1->remove($arr))
echo ‘删除成功‘;
else
echo ‘删除失败‘;




样例4：改
include "conn.php";
$c1 = $db->c1;
//db.c1.update({"name"=>"user2"},{$set:{age:20,sex:"nan"}}); 添加字段
$sarr = array("name"=>"user2");
$darr = array(‘$set‘=>array(‘sex‘=>‘nan‘,‘age‘=>24));
$opts = array(‘upsert‘=>0,‘multiple‘=>1);
if($c1->update($sarr,$darr,$opts))  //php里面的update仅仅能传3个參数
echo ‘更改成功‘;
else
echo ‘更改失败‘;

//关闭
$conn->close();
?

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