PHP Mongo:command not found - php

Question

I have been trying to use the mongo::command in PHP to build a MapReduce but every time I run my code I get the following error: PHP Fatal Error, call to undefined method "mongo:command"
My Code:
try {
$map = new MongoCode("function() {
if (!this.tags) {
return;
}
for (index in this.tags) {
emit(this.tags[index], 1);
}");
$reduce = new MongoCode("function(previous, current) {
var count = 0;
for (index in current) {
count += current[index];
}
return count;
}");
$tags = $this->db->command(array( //Line the error is found on
"mapreduce" => "blog",
"map" => $map,
"reduce" => $reduce));
$con=$this->db->selectCollection($tags['result'])->find();
var_dump($con);
}
catch(MongoCursorException $e) {
echo "error message: ".$e->getMessage()."\n";
echo "error code: ".$e->getCode()."\n";
}
Please note $this->db refers to my connection (previously defined) and blog is the collection.
For reference I have used: http://php.net/manual/en/mongodb.command.php
The OS I use is Ubuntu 12.04 and I've double checked both php.ini files which both include mongo.so - I can do normal queries with mongodb like inserting and fetching data, its just the command seems not to work.

Answer 1

do you select collection like $d = $m->demo;
php.net:
<?php
$m = new MongoClient();
$d = $m->demo;
$c = $d->poiConcat;
$r = $d->command(array(
'geoNear' => "poiConcat", // Search in the poiConcat collection
'near' => array(-0.08, 51.48), // Search near 51.48°N, 0.08°E
'spherical' => true, // Enable spherical search
'num' => 5, // Maximum 5 returned documents
));
print_r($r);
?>
i think in your code you didn't select collection $d = $this->db->demo; put collection name instead of demo
try {
$map = new MongoCode("function() {
if (!this.tags) {
return;
}
for (index in this.tags) {
emit(this.tags[index], 1);
}");
$reduce = new MongoCode("function(previous, current) {
var count = 0;
for (index in current) {
count += current[index];
}
return count;
}");
$d = $this->db->demo;// attention
$tags = $d->command(array( //Line the error is found on
"mapreduce" => "blog",
"map" => $map,
"reduce" => $reduce));
$con=$d->selectCollection($tags['result'])->find();
var_dump($con);
}
catch(MongoCursorException $e) {
echo "error message: ".$e->getMessage()."\n";
echo "error code: ".$e->getCode()."\n";
}
Edit Sample:i Do this sample see it
try {
$map = new MongoCode("function() { emit(this.user_id,1); }");
$reduce = new MongoCode("function(k, vals) { ".
"var sum = 0;".
"for (var i in vals) {".
"sum += vals[i];".
"}".
"return sum; }");
$db=new Mongo("mongodb://sepidar:123#localhost:27017/admin");
$d = $db->SepidarSoft_CBMS;// attention
$tags = $d->command(array( //Line the error is found on
'mapReduce'=>'RunUser',
"map" => $map,
"reduce" => $reduce,
"out" => array('merge'=>'SepidarSoft_CBMS', 'db'=> 'RunUser')
));
print_r($tags);
}
catch(MongoCursorException $e) {
echo "error message: ".$e->getMessage()."\n";
echo "error code: ".$e->getCode()."\n";
}
result
Array
(
[result] => Array
(
[db] => RunUser
[collection] => SepidarSoft_CBMS
)
[timeMillis] => 2
[counts] => Array
(
[input] => 1
[emit] => 1
[reduce] => 0
[output] => 1
)
[ok] => 1
)