$GLOBALS['value1'] is not working

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My custom PHP script works on my PC over localhost. But, when I upload my code to the 'live' WordPress site, The $GLOBALS values are just null even they work on my localhost. (Nothing wrong with the database connection). Is the $GLOBALS not working on WordPress? My code is something like this one below:

$get_value = $db->query("SELECT * FROM mytable")->fetch();
$get_variable = $get_value['myvalue'];
function myfunction(){
   return $GLOBALS['get_variable']; 
}

My custom PHP script works on my PC over localhost. But, when I upload my code to the 'live' WordPress site, The $GLOBALS values are just null even they work on my localhost. (Nothing wrong with the database connection). Is the $GLOBALS not working on WordPress? My code is something like this one below:

$get_value = $db->query("SELECT * FROM mytable")->fetch();
$get_variable = $get_value['myvalue'];
function myfunction(){
   return $GLOBALS['get_variable']; 
}

• globals

Share Improve this question edited May 4, 2018 at 14:49 Mayeenul Islam 12.9k2121 gold badges8585 silver badges169169 bronze badges asked May 4, 2018 at 14:43 mage_entomage_ento 1122 bronze badges 1

• maybe the place where you set the variable is not in a global scope then try $GLOBALS['get_variable'] = ... to set it. – mmm Commented May 11, 2018 at 18:29

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1 Answer 1

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The correct syntax for using with global keyword. To access a global variable in WordPress, you first need to globalize the variable with global $variable;

Write inside function.php as:

    function myfunction(){
       global $get_variable;
       $get_value = $db->query("SELECT * FROM mytable")->fetch();
       $get_variable = $get_value; 
    }

add_action( 'after_theme_setup', 'myfunction' );

Inside the function you can now able to any where. But, outside of this scope it needs to be re-declared as a global scope variable. Ex., to use inside single.php file, it will work as

global $get_variable;
echo $get_variable;

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