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POdefine a closure as method from class
 

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    <p>i'm trying to play with php5.3 and closure.</p> <p>I see here (Listing 7. Closure inside an object : <a href="http://www.ibm.com/developerworks/opensource/library/os-php-5.3new2/index.html" rel="noreferrer">http://www.ibm.com/developerworks/opensource/library/os-php-5.3new2/index.html</a>) that it's possible to use $this in the callback function, but it's not. So I try to give $this as use variable :</p> <pre><code>$self = $this; $foo = function() use($self) { //do something with $self } </code></pre> <p>So to use the same example :</p> <pre><code>class Dog { private $_name; protected $_color; public function __construct($name, $color) { $this-&gt;_name = $name; $this-&gt;_color = $color; } public function greet($greeting) { $self = $this; return function() use ($greeting, $self) { echo "$greeting, I am a {$self-&gt;_color} dog named {$self-&gt;_name}."; }; } } $dog = new Dog("Rover","red"); $dog-&gt;greet("Hello"); Output: Hello, I am a red dog named Rover. </code></pre> <p>First of all this example does not print the string but return the function, but that's not my problem.</p> <p>Secondly I can't access to private or protected, because the callback function is a global function and not in the context from the Dog object. Tha't my problem. It's the same as :</p> <pre><code>function greet($greeting, $object) { echo "$greeting, I am a {$self-&gt;_color} dog named {$self-&gt;_name}."; } </code></pre> <p>And I want :</p> <pre><code>public function greet($greeting) { echo "$greeting, I am a {$self-&gt;_color} dog named {$self-&gt;_name}."; } </code></pre> <p>Which is from Dog and not global.</p>
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    1. CONo, I didn't understand what you want. If greet is a method, the visibility defauls to public, so your two last code blocks are equivalent.
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    2. COThat magic injection of `$this` in a clojure has been dropped before PHP 5.3 was released. Actually, it was postponed for an upcoming version of PHP. There will some something like `Closure::bindTo` that one can use to bind objects as contexts to lambdas.
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