PHP Operations MongoDB

one, linked database

$conn = new Mongo ("Mongodb://ip:port/dbname:dbpwd");
This is the default connection to the local 27017 port, of course, you can also connect remote host such as $db = $conn->selectdb ("dbname"); $collection = $db->selectcollection (' tablename '); This is called TableName easy to understand, in fact MONGO is called set $dbs = $conn->listdbs ();
Gets an array//var_dump ($DBS) containing the DB information; $tbs = $db->listcollections ()//Get an array that contains the collection ($tbs as $val) {echo "TB1: $val <br>";} echo "Count:". $
Collection->count ();
echo "<br>";
echo "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
$cursor = $collection->find ();
$rs = $cursor->sort (Array ("key" =>1))->skip->limit;//skip equivalent to SQL Start,limit equivalent to MySQL offset echo "<table><tr><td align= ' center ' >id</td><td align= ' center ' >width</td>< TD align= ' Center ' >height</td><td align= ' center ' >url</td><td align= ' center ' >from</td
&GT;&LT;TD align= ' center ' >key</td><td align= ' center ' >title</td></tr> '; foreach ($rs as $val) {//var_dUMP ($val); echo "<tr><td>". $val ["_id"]. " </td><td> ". $val [" width "]." </td><td> ". $val [" height "]." </td><td> ". $val [" url "]." </td><td> ". $val [" from "]." </td><td> ". $val [" Key "]." </td><td> ". $val [" title "]."
	</td></tr> ";
Var_dump ($val); echo "</table>";

Ii. insertion of data

$collection = $db->selectcollection (' grppic ');//mongodb do not have to set up a collection (table), there is no table structure
$doc = Array (
	' title ' =>  ' title ',
	' thumb ' => ' thumb ',
	//can automatically set each record
	' URL ' => (object) Array ("1.jpg", "2.jpg", "3.jpg" according to the size of the data) , "4.jpg")
);
$cord = Array (' title ' => ' title ', ' Thumb ' => ' thumb ', ' url ' => ' aaaaa ', ' title ' => ' inserted ');
$collection->insert ($doc);
echo $doc [' _id '];
Returns the last inserted $id value
//Update action
//The following number ID is the value of the returned $id

iii. Modification of data

$id =new mongoid ("5271c4f0da466aec0c000000");//each inserted recording system gives a $id, which can be known by find
$where =array (' _id ' => ( object) $id);
$newdata =array (' URLs ' => (object) Array ("A.jpg", "b.jpg"));
$result = $collection->update ($where, Array (' $set ' => $newdata));
MongoDB also supports batch updates, similar to relational databases, where you can update all documents for a given condition, and if you want to do so, you need to set the multiple value of the options to true.
$result = $collection->update ($where, Array (' $set ' => $newdata), array (' multiple ' =>true));

$cursor = $collection->find ();
while ($cursor->hasnext ()) {
    var_dump ($cursor->getnext ());
}

iv. deletion of data

$collection->remove ();//Empty datasheet
//$collection->remove (Array (' _id ' => new Mongoid ($id));//Delete a record
//$collection->remove (Array (' genre ' => ' drama '), Array (' Justone ' => True));//Add Justone parameter, Only one record that meets the criteria is deleted, others do not delete//$collection->drop ();//drop efficiency is higher than remove