Print php variable that is inside functions into HTML

Question

I have some functions that work together. But I need to print inside my html some variables used on these functions.

I know I Could:

Is it possible to print a variable that is NOT global, that is inside a function?

function myFunc()
{
   $var1
   //code...
}

<td> <?= echo $var1 ?></td>

Possible duplicate of [PHP function use variable from outside](https://stackoverflow.com/questions/11086773/php-function-use-variable-from-outside) — , Oct 18 '17 at 19:43
No, and for a(t least one) good reason. Either make the function return something to be used, or pass that var to that function in first place (by reference if you are really sure what you're doing), or, or, ... [Just don't make it global](https://stackoverflow.com/questions/1557787/are-global-variables-in-php-considered-bad-practice-if-so-why). — Jeff, Oct 18 '17 at 19:46
Obviously not, which values should it keep if it hasn’t even been allocated? — NoImaginationGuy, Oct 18 '17 at 19:47

mega6382 · Answer 1 · 2017-10-18T20:08:02.053

The only way it is possible is by having it declared in global scope. Like:

Method 1: Passing by reference:

<?php
function myFunc(&$var1)
{
   $var1 = 32;
}
myFunc($var1);
?>

<td> <?= $var1 ?></td>

Method 2: Using a globally defined variable inside the function:

<?php

$var1 = 0;
function myFunc()
{
    global $var1;
   $var1 = 32;
}
myFunc($var1);
?>

<td> <?= $var1 ?></td>

Method 3: Returning the variable from the function:

<?php

function myFunc()
{
   $var1 = 32;
   return $var1;
}
$var1  = myFunc($var1);
?>

<td> <?= $var1 ?></td>

Method 4: You can set the variable as enivironment var:

<?php
function myFunc()
{
    $var1 = 32;
    putenv("var1=$var1");
}
myFunc();
?>

<td> <?= getenv('var1') ?></td>

Method 5: You can use the superglobal $_SESSION:

<?php
session_start();
function myFunc()
{
    $var1 = 32;
    $_SESSION['var1'] = $var1;
}
myFunc();
?>

<td> <?= $_SESSION['var1'] ?></td>

1 Answers1