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POIs is possible to store a reference to an object method?
primarykey
Id
16380745
data
AcceptedAnswerId
16380820
AnswerCount
3
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-05-05T02:13:41.460
FavoriteCount
2
LastActivityDate
2017-03-24T18:58:01.300
LastEditDate
2013-05-05T02:27:36.903
LastEditorUserId
1331430
OwnerUserId
1331430
ParentId
0
PostTypeId
1
Score
1
ViewCount
982
LastEditorDisplayName
text
Body
Assume this class code: <pre><code>class Foo { function method() { echo 'works'; } } </code></pre> Is there any way to store a reference to the <code>method</code> method of a <code>Foo</code> instance? I'm just experimenting and fiddling around, my goal is checking whether PHP allows to call <code>$FooInstance->method()</code> without writing <code>$FooInstance-></code> every time. I know I could write a function wrapper for this, but I'm more interested in getting a reference to the instance method. For example, this pseudo-code would theoretically store <code>$foo->method</code> in the <code>$method</code> variable: <pre><code>$foo = new Foo(); $method = $foo->method; //Undefined property: Foo::$method $method(); </code></pre> Apparently, as <code>method</code> is a method and I'm not calling it with <code>()</code> the interpreter thinks I'm looking for a property thus this doesn't work. I've read through <a href="http://www.php.net/manual/en/language.references.return.php" rel="nofollow">Returning References</a> but the examples only show how to return references to variables, not methods. Therefore, I've adapted my code to store an anonymous function in a variable and return it: <pre><code>class Foo { function &method() { $fn = function() { echo 'works'; }; return $fn; } } $foo = new Foo(); $method = &$foo->method(); $method(); </code></pre> This works, but is rather ugly. Also, there's no neat way to call it a single time, as this seems to require storing the returned function in a variable prior to calling it: <code>$foo->method()();</code> and <code>($foo->method())();</code> are syntax errors. Also, I've tried returning the anonymous function directly without storing it in a variable, but then I get the following notice: <blockquote> Notice: Only variable references should be returned by reference </blockquote> Does this mean that returning/storing a reference to a class instance method is impossible/discouraged or am I overlooking something? <hr> Update: I don't mind adding a getter if necessary, the goal is just getting a reference to the method. I've even tried: <pre><code>class Foo { var $fn = function() { echo 'works'; }; function &method() { return $this->fn; } } </code></pre> But from the <code>unexpected 'function' (T_FUNCTION)</code> error I'd believe that PHP wisely doesn't allow properties to store functions. I'm starting to believe that my goal isn't easily achievable without the use of ugly hacks as <code>eval()</code>.
Tags
<php>
Title
Is is possible to store a reference to an object method?
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PostAcceptedAnswerId
1. PO
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 PTAnswer
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1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USFabrício Matté
UserOwnerUserId
1. USFabrício Matté
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1. PO
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2. PO
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1. VO
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2. VO
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 POIs is possible to store a reference to an object method?
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