MongoDB
PHP Manual

MongoDB::execute

(PECL mongo >=0.9.3)

MongoDB::executeRuns JavaScript code on the database server.

Descrição

public array MongoDB::execute ( mixed $code [, array $args = array() ] )

The Mongo database server runs a JavaScript engine. This method allows you to run arbitary JavaScript on the database. This can be useful if you want touch a number of collections lightly, or process some results on the database side to reduce the amount that has to be sent to the client.

Parâmetros

code

MongoCode or string to execute.

args

Arguments to be passed to code.

Valor Retornado

Returns the result of the evaluation.

Exemplos

Exemplo #1 Simple MongoDB::execute() example

<?php

$response 
$db->execute("function() { return 'Hello, world!'; }");
echo 
$response['retval'];

?>

O exemplo acima irá imprimir algo similar a:


Hello, world!

Exemplo #2 Parameter MongoDB::execute() example

The optional array of parameters will be passed to the JavaScript function.

<?php

$response 
$db->execute("function(greeting, name) { return greeting+', '+name+'!'; }", array("Good bye""Joe"));
echo 
$response['retval'];

?>

O exemplo acima irá imprimir algo similar a:


Good bye, Joe!

Exemplo #3 Scope example

If a MongoCode object is used instead of a string for the first parameter, a scope can be passed in which the JavaScript will be executed.

<?php

$func 

    
"function(greeting, name) { ".
        
"return greeting+', '+name+', says '+greeter;".
    
"}";
$scope = array("greeter" => "Fred");

$code = new MongoCode($func$scope);

$response $db->execute($code, array("Goodbye""Joe"));
echo 
$response['retval'];

?>

O exemplo acima irá imprimir algo similar a:


Goodbye, Joe, says Fred

MongoDB
PHP Manual