Call Variable from a function to another function within PHP class

Solution:

One possible way to archive this, is by using a class-variable.

class My_Class {
    private $g_types;
    function first_function() {
        $gperson = $this->g_types['g_person'];
    }
    function second_function() {
        $this->g_types = array(
            'Person Widget'    => 'g_person',
            'Page Widget'      => 'g_page',
            'Community Widget' => 'g_community'
        );
    }
}
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Solution:

Well you can return $g_types in second function and use it in first function.

function first_function()
{
$returnedValue = second_function();
}
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But i suggest you to read about scope of the variables in php so that you won't encounter this problem anymore.