php - Clarity on Code -

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just looking clarity on code.

i'm looking @ controller class, has protected variables named $grid , inside there there __construct function connect mongodb, after there code:

$this->grid = $mongo->selectdb($database)->getgridfs();

further on in in script in class , method have code

 foreach ($this->grid->find() $file) {

am right in thinking foreach using first defined $this->grid being $monmgo->selectdb?

many thanks

it worth reading on php5 objects , classes __construct(), $this, , method call chaining basic object-oriented implementation concepts in php.

the php method calls chained in code example, means results of 1 method being passed next (from left right). 

 $this->grid = $mongo->selectdb($database)->getgridfs();

so code executes as:

$this->grid end being new mongogridfs object (based on return type of getgridfs().

the foreach iterating on results of mongogridfs object find() method mongogridfscursor.


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