CODEWITHSUNDEEP
phpfunctionvariables
Pedram
Pedram

Reputation: 16575

PHP passing variable to a function in another file

index.php

require '../include/FunctionFile.php';
$test = "blah";
myfunction($test);

FunctionFile.php

function myfunction($test){
    global $test;
    echo $test;
}

I want to pass $test value to myfunction but look like it's not working, it's return nothing, nothing in error log.

Upvotes: 0

Views: 64

Answers (3)

krishnakumar
krishnakumar

Reputation: 118

You can also try this 

myfunction("args");
function myfunction($test){
	echo $test;
}

Upvotes: 0

devpro
devpro

Reputation: 16117

I know other mate already provided the solution, so i am adding my answer for future aspects.

Suppose you have two functions getHello() and getGoodbye() with different definition same purpose.

// function one
function getHello(){
    return "Hello";
}

// function two
function getGoodbye(){
    echo "Goodbye";
}

//now call getHello() function
$helloVar = getHello();

Result:

'Hello' // return 'hello' and stored value in $helloVar

//now call getGoodbye() function
$goodbyeVar = getGoodbye();

Result:

'Goodbye' // echo 'Goodbye' and not stored in $goodbyeVar

echo $helloVar; // "Hello" 
echo $goodbyeVar; // Goodbye

Result:

'GoodbyeHello'

// now try same example with this:

echo $helloVar; // "Hello" 
//echo $goodbyeVar; // Goodbye

Result should be same because getGoodbye() already echo'ed the result.

Now Example with Your Code:

function myfunction($test){
    //global $test;
    echo $test;
}

function myfunction2($test){
    //global $test;
    return $test;
}

myfunction('test'); // test
myfunction2('test'); // noting

//You need to echo myfunction2() as i mentioned in above.

echo myfunction2('test'); // test

Why it's not working in your code?:

you need to declare variable as Global before assigning the values like:

global $test;
$test = "blah";

Upvotes: 1

Saty
Saty

Reputation: 22532

Your function need return value.

index.php

require '../include/FunctionFile.php';
$test = "blah";
$var=myfunction($test);// assign to vaiable
echo $var;

FunctionFile.php

function myfunction($test){
    return $test;// use return type here
}

Upvotes: 2

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