Use global variables for component functions

[wanjakarl]

Is it possible to use variables like this?

Your snippet: https://github.com/flyntwp/flynt#advanced-custom-fields

My snippet:

<?php

namespace Flynt\Components\BlockWysiwyg;

$var = "foo";

function getACFLayout()
{
    global $var;

    return [
        'name' => $var,
        'label' => 'Block: Wysiwyg',
        'sub_fields' => [
            [
                'label' => __('Content', 'flynt'),
                'name' => 'contentHtml',
                'type' => 'wysiwyg',
                'delay' => 1,
                'media_upload' => 0,
                'required' => 1,
            ],
        ]
    ];
}

function foo() {
    global $var;

    echo $var;
}

$var in getACFLayout() and foo() returns null 😢

Thanks in advance!

[domtra]

Hi @wanjapflueger,
I was actually a bit surprised, when I saw your question. I would expected it to actually work exactly like you tried it.
However, after a bit of digging around, I found the reason why it is not working as expected.
We require_once the components' function.php files inside other functions inside WordPress hooks. So your initial $var ='foo'; does actually not set a global variable.
In order to explicitly achieve what you are trying to, change the beginning of you code to

<?php

namespace Flynt\Components\BlockWysiwyg;

global $var;
$var = "foo";

function getACFLayout()

Hope that helps!

[wanjakarl]

Hi @domtra,

thank you very much for your reply!

👍 The suggested solution does the trick!

👎 It does however interfere with intellisense and linting, since its a dirty solution. Please consider fixing in an upcoming release.

⚠️ Warning: You want to watch out for already declared global variable names (for example $c which is an integer in /wp-admin/admin.php), so its best you choose a unique variable name that Flynt or WordPress does not already use.

This is now the working solution:

<?php

namespace Flynt\Components\BlockWysiwyg;

global $uniqueUnicorn;
$uniqueUnicorn = "foo";

function getACFLayout()
{
    global $var;

    return [
        'name' => $uniqueUnicorn,
        // ...
    ];
}