CODEWITHSUNDEEP
phpfunction
Rodmentou
Rodmentou

Reputation: 1640

How to transform a php $string into a $string() function call?

My current code:

$operation = "alienFunction";
switch($operation){
        case "alphaFunction":
            alphaFunction();
            break;
        case "betaFunction":
            betaFunction();
            break;
        case "alienFunction":
            alienFunction($kidsPerPlanet, $planet);
            break;

Ok, I have a big list of functions. Some functions have parameters and some have not. The $operation is received from a $_POST variable. I want to do something like this:

$operation = "alphafunction";
$operation();

Or

$operation = "alienFunction";
$operation($kidsPerPlanet, $planet);

Upvotes: 0

Views: 45

Answers (2)

Rodmentou
Rodmentou

Reputation: 1640

Excellent. Thanks, guys. For functions with no parameters, it's working perfectly. I'm trying this now:

$userInfo = MySQL_FETCH_ARRAY( MySQL_QUERY( ($autoAuth) ) );
CALL_USER_FUNC_ARRAY($operation, $userInfo);

Inside of one of functions, I have this piece of code inserted into HTML:

ECHO "<p>" . VAR_DUMP($userInfo) . "</p>";

And the result gives me "string(2) "25".

I'm new here. So I don't know what to do. For sure, my question is answered. Now I know how to use a string to call a function. Should I close this, select the best answer and create another question? Should I let it open, while my WHOLE problem is solved? Or should I close it and still comment here to get feedback?

Thanks a lot. I'm loving this. I wish that I can contribute as soon as possible too. :)

Upvotes: 0

Rizier123
Rizier123

Reputation: 59681

As already written in the comments you are looking for call_user_func_array(). Just use it like this:

call_user_func_array($functionName, $argumentArray);

But since you don't know which function you call with which parameters, just define an array and then use the code above, e.g.

$arguments = [
        "alphaFunction" => [],
        "betaFunction" => [],
        "alienFunction" => [$kidsPerPlanet, $planet],
    ];

call_user_func_array($functionName, $arguments[$functionName]);

Upvotes: 1

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