PHP pass variable to include

user_1590646 0
Viewed 169608

I'm trying to pass a variable into an include file. My host changed PHP version and now whatever solution I try doesn't work.

I think I've tried every option I could find. I'm sure it's the simplest thing!

The variable needs to be set and evaluated from the calling first file (it's actually $_SERVER['PHP_SELF'], and needs to return the path of that file, not the included second.php).

OPTION ONE

In the first file:

global $variable;
$variable = "apple";
include('second.php');

In the second file:

echo $variable;

OPTION TWO

In the first file:

function passvariable(){
    $variable = "apple";
    return $variable;
}
passvariable();

OPTION THREE

$variable = "apple";
include "myfile.php?var=$variable"; // and I tried with http: and full site address too.


$variable = $_GET["var"]
echo $variable

None of these work for me. PHP version is 5.2.16.

What am I missing?

Thanks!

global global-variables include variables php
14 Answers

I've run into this issue where I had a file that sets variables based on the GET parameters. And that file could not updated because it worked correctly on another part of a large content management system. Yet I wanted to run that code via an include file without the parameters actually being in the URL string. The simple solution is you can set the GET variables in first file as you would any other variable.

Instead of:

include "myfile.php?var=apple";

It would be:

$_GET['var'] = 'apple';
include "myfile.php";
user_92057550

OPTION 1 worked for me, in PHP 7, and for sure it does in PHP 5 too. And the global scope declaration is not necessary for the included file for variables access, the included - or "required" - files are part of the script, only be sure you make the "include" AFTER the variable declaration. Maybe you have some misconfiguration with variables global scope in your PHP.ini?

Try in first file:

  <?php 
  $myvariable="from first file";
  include ("./mysecondfile.php"); // in same folder as first file LOLL
  ?>

mysecondfile.php

  <?php 
  echo "this is my variable ". $myvariable;
  ?>

It should work... if it doesn't just try to reinstall PHP.

user_94728270

I know this is an old question, but stumbled upon it now and saw nobody mentioned this. so writing it.

The Option one if tweaked like this, it should also work.

The Original

Option One

In the first file:

global $variable; 
$variable = "apple"; 
include('second.php');

In the second file:

echo $variable;

TWEAK

In the first file:

$variable = "apple"; 
include('second.php');

In the second file:

global $variable;
echo $variable;
user_122842920

You can execute all in "second.php" adding variable with jQuery

<div id="first"></div>

<script>
$("#first").load("second.php?a=<?php echo $var?>")
</scrpt>
user_10629730

An alternative to using $GLOBALS is to store the variable value in $_SESSION before the include, then read it in the included file. Like $GLOBALS, $_SESSION is available from everywhere in the script.

user_9884660

This worked for me: To wrap the contents of the second file into a function, as follows:

firstFile.php

<?php
    include("secondFile.php");

    echoFunction("message");

secondFile.php

<?php
    function echoFunction($variable)
    {
        echo $variable;
    }
user_18705170
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