Call function directly from PHP array

Question

I am trying to call a PHP function via an array like so:

$x = (object) array(
    "one" => "value",
    "two" => "value2",
    "three" => function() {
        return "return_value";
    }
);

echo($x->three());

From this I receive the error:

<b>Fatal error</b>:  Call to undefined method stdClass::three()

I've searched a bit and cannot find any documentation on this, however I ran this through

php -l filename.php

which found no syntax errors.

I would like to know if what I'm trying to do is possible (end goal is to call a function with parameters from an array). Is anybody able to shed some light on this?

Thanks

Note, I have also tried:

function foo() {
    return "bar";
}
$x = (object) array(
    "foo" => foo
);
...

which leads to the same result.

Amal · Accepted Answer · 2014-03-04 17:57:50Z

3

Use an array instead of an object:

$x = array(
    "one" => "value",
    "two" => "value2",
    "three" => function() {
        return "return_value";
    }
);

To call the lambda function, you can do:

echo $x['three']();

Demo

If you really must use an object, then you can do the following:

$x = array(
    "one" => "value",
    "two" => "value2",
);

$obj = (object) $x;
$obj->three = function() {
    return "return_value";
};

To call the function:

echo $obj->three->__invoke();

Demo

edited Mar 4, 2014 at 17:57

answered Mar 4, 2014 at 17:47

Amal

76.8k18 gold badges133 silver badges154 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Merioles · Accepted Answer · 2014-03-04 18:23:51Z

2

The type of method you created is classified as an anonymous function and is represented by the Closure class and thus inherits its properties, which includes the invoke method as specified by Amal Murali.

You have two ways of calling this function:

echo $x->three->__invoke();
echo call_user_func( $x->three );

If you need to pass arguments, you can call $x->three->__invoke( $args ); or call_user_func( $x->three, $args1, $args2 );.

answered Mar 4, 2014 at 18:23

Merioles

2682 silver badges12 bronze badges

Collectives™ on Stack Overflow

Call function directly from PHP array

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related