Heim > Artikel > Backend-Entwicklung > mongodb php,mongodb_PHP教程
首先安装扩展,然后才能使用mongodb
一、连接数据库
<span>try</span><span> { </span><span>$mongo</span> = <span>new</span><span> MongoClient(); </span><span>$db</span> = <span>$mongo</span>-><span>mydb; </span><span>var_dump</span>(<span>$db</span><span>); } </span><span>catch</span> (MongoConnectionException <span>$e</span><span>) { </span><span>echo</span> <span>$e</span>-><span>getMessage(); }</span>
该代码可以连接mydb数据库,如果该数据库不存在则自动创建。
二、创建集合
<span>try</span><span> { </span><span>$mongo</span> = <span>new</span><span> MongoClient(); </span><span>$db</span> = <span>$mongo</span>-><span>mydb; </span><span>$mycol</span> = <span>$db</span>->createCollection('mycol'<span>); </span><span>var_dump</span>(<span>$mycol</span><span>); } </span><span>catch</span> (MongoConnectionException <span>$e</span><span>) { </span><span>echo</span> <span>$e</span>-><span>getMessage(); }</span>
该代码可以创建集合mycol。
三、插入文档
mongodb中使用insert()来插入文档。
<span>try</span><span> { </span><span>$mongo</span> = <span>new</span><span> MongoClient(); </span><span>$db</span> = <span>$mongo</span>-><span>mydb; </span><span>$mycol</span> = <span>$db</span>-><span>mycol; </span><span>$document</span> = <span>array</span>('name' => 'test1' , 'sex' => 'formale' , 'age' => 20<span>); </span><span>$res</span> = <span>$mycol</span>->insert(<span>$document</span><span>); </span><span>var_dump</span>(<span>$res</span><span>); } </span><span>catch</span> (MongoConnectionException <span>$e</span><span>) { </span><span>echo</span> <span>$e</span>-><span>getMessage(); }</span>
输出:
<span>array</span> (size=4<span>) </span>'ok' => <span>float</span> 1 'n' => int 0 'err' => <span>null</span> 'errmsg' => <span>null</span>
四、查找文档
mongodb使用find()来查找文档
<span>try</span><span> { </span><span>$mongo</span> = <span>new</span><span> MongoClient(); </span><span>$db</span> = <span>$mongo</span>-><span>mydb; </span><span>$mycol</span> = <span>$db</span>-><span>mycol; </span><span>$mongoCursor</span> = <span>$mycol</span>-><span>find(); </span><span>foreach</span> (<span>$mongoCursor</span> <span>as</span> <span>$document</span><span>) { </span><span>var_dump</span>(<span>$document</span><span>); } } </span><span>catch</span> (MongoConnectionException <span>$e</span><span>) { </span><span>echo</span> <span>$e</span>-><span>getMessage(); }</span>
结果:
<span>array</span> (size=4<span>) </span>'_id' => <span>object</span>(MongoId)[7<span>] </span><span>public</span> '$id' => <span>string</span> '56c28a793b22cf5415000029' (length=24<span>) </span>'name' => <span>string</span> 'test1' (length=5<span>) </span>'sex' => <span>string</span> 'formale' (length=7<span>) </span>'age' => int 20
五、更新文档
使用update()来更新文档
<span>try</span><span> { </span><span>$mongo</span> = <span>new</span><span> MongoClient(); </span><span>$db</span> = <span>$mongo</span>-><span>mydb; </span><span>$mycol</span> = <span>$db</span>-><span>mycol; </span><span>$mycol</span>->update(<span>array</span>('name'=>'test1') , <span>array</span>('$set'=><span>array</span>('age' => 21<span>))); </span><span>$mongoCursor</span> = <span>$mycol</span>-><span>find(); </span><span>foreach</span> (<span>$mongoCursor</span> <span>as</span> <span>$document</span><span>) { </span><span>var_dump</span>(<span>$document</span><span>); } } </span><span>catch</span> (MongoConnectionException <span>$e</span><span>) { </span><span>echo</span> <span>$e</span>-><span>getMessage(); }</span>
结果
<span>array</span> (size=4<span>) </span>'_id' => <span>object</span>(MongoId)[7<span>] </span><span>public</span> '$id' => <span>string</span> '56c28a793b22cf5415000029' (length=24<span>) </span>'name' => <span>string</span> 'test1' (length=5<span>) </span>'sex' => <span>string</span> 'formale' (length=7<span>) </span>'age' => int 21
六、删除文档
<span>try</span><span> { </span><span>$mongo</span> = <span>new</span><span> MongoClient(); </span><span>$db</span> = <span>$mongo</span>-><span>mydb; </span><span>$mycol</span> = <span>$db</span>-><span>mycol; </span><span>$mycol</span>->remove(<span>array</span>('name'=>'test1'<span>)); </span><span>$mongoCursor</span> = <span>$mycol</span>-><span>find(); </span><span>foreach</span> (<span>$mongoCursor</span> <span>as</span> <span>$document</span><span>) { </span><span>var_dump</span>(<span>$document</span><span>); } } </span><span>catch</span> (MongoConnectionException <span>$e</span><span>) { </span><span>echo</span> <span>$e</span>-><span>getMessage(); }</span>
remove方法
<span>public</span> bool|<span>array</span> MongoCollection::remove ([ <span>array</span> <span>$criteria</span> = <span>array</span>() [, <span>array</span> <span>$options</span> = <span>array</span>() ]] )
options删除的选项:
“w”:抛出异常的级别,默认是1;
“justOne”:最多只删除一个匹配的记录;
“fsync”:Boolean, defaults to FALSE
. Forces the insert to be synced to disk before returning success. If TRUE
, an acknowledged insert is implied and will override setting w to 0.
“timeout”:Integer, defaults to MongoCursor::$timeout. If "safe" is set, this sets how long (in milliseconds) for the client to wait for a database response. If the database does not respond within the timeout period, aMongoCursorTimeoutException will be thrown.
......
其他方法可参见php手册:http://php.net/manual/zh/book.mongo.php