MongoCode::__construct

(PECL mongo >= 0.8.3)

MongoCode::__construct — Creates a new code object

说明

public MongoCode::__construct ( string $code [, array $scope = array() ] )

参数

code: A string of code.
scope: The scope to use for the code.

返回值

Returns a new code object.

范例

Example #1 MongoCode::__construct() example


<?php

$code = new MongoCode('function() { '.
    'for(i=0;i<10;i++) {'.
        'db.foo.update({z : i}, {z : x});'.
    '}'.
    'return x-1;'.
 '}', array("x" => 4));
var_dump($code);

?>

以上例程的输出类似于：

object(MongoCode)#1 (2) {
  ["scope"]=>
  array(1) {
    ["x"]=>
    int(4)
  }
  ["code"]=>
  string(80) "function() { for(i=0;i<10;i++) { db.foo.update({z : i}, {z : x}); } return x-1; }"
}

Example #2 Using MongoCode with $where

This example queries a collection for elements where the 'x' fields is less than $y. Notice that PHP objects can be passed into the JavaScript scope and that the JavaScript function returns a boolean.


<?php

$cursor = $collection->find(array('$where' => new MongoCode('function() { return this.x < y; }', array('y'=>$y))));

?>