Passing Variables into PHP Function Scope

Question

Is there a way to pass a variable into a function scope in PHP similar to Javascript? Here's what I understand thus far:

// Simple Function
$hello_world = function(){
    echo 'Hello World 1';
};
$hello_world();

// Using Global Variable
$text = 'Hello World 2';
$hello_world = function(){
    // Need to Add Global
    global $text;
    // Adding Text
    echo $text;
};
$hello_world();


// Dynamically Created Functions
$function_list = [];
// Function to Create Dynamic Function
function create_dynamic_function($function_name,$response_text){
    global $function_list;
    $function_list[$function_name] = function(){
        echo $response_text;    // Want to Echo the Input $response_text, but it cannot find it
    };
}

create_dynamic_function('Hello','Hello World 3');
$function_list['Hello'](); // Doesn't Work

I would like to pass the response text into the newly generated function without have to check what is response_text. it could be a string, int, boolean, object etc

function() use($response_text)

Vivick
– Vivick

2017-11-04 22:42:23 +00:00
Commented Nov 4, 2017 at 22:42 — Vivick
– Vivick, Commented Nov 4, 2017 at 22:42

Mark Baker · Accepted Answer · 2017-11-04 22:41:10Z

2

$response_text isn't in scope inside the anonymous function that you're creating:

function create_dynamic_function($function_name,$response_text){
    global $function_list;
    $function_list[$function_name] = function() use ($response_text) {
        echo $response_text;    // Want to Echo the Input $response_text, but it cannot find it
    };
}

For reference, arguments passed to an anonymous function are values applied when that function is executed; arguments passed via use are values applied when the function is defined.

answered Nov 4, 2017 at 22:41

Mark Baker

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1 Comment

Noobit Over a year ago

Thank a lot :). I'm just a newbie PHP coder, and most of my coding knowledge is from Javascript. I figure PHP is similar to Javascript enough. I will mark this as accepted answer when I am able.

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