The Drupal framework and theme engine are very powerful. Whenever I override a function, I start with the following code to see what variables are defined in the current function scope...
<?php
echo "<pre>";
print_r(get_defined_vars());
echo "</pre>";
?>
Comments
General rule on variable definition
hi,
inshort: what is the rule on variable declaration and definition?
inLength:
i am trying to create a module for Drupal.
my php function works fine standalone. but when i call it from within drupal it does not.
after many hours of debugging, i found out i need help:)
- All global variables in my code are not accessible. what is the rule on variable declaration and definition?
- what do developers use for debugging? :)
thanks
variables
Short answer: it depends. When I need to allow the user to choose settings for a module, I create an admin settings page. This allows you to use variable_get() in your module code to pull their settings.
Generally the only variables I define outside of Drupal hook functions are global constants [using define()]. To access them within your functions, you can just call them directly (see: http://php.net/manual/en/language.constants.php).
A lot of modules pull Drupal variables into function scope using the global keyword. For example:
<?phpfunction myfunction() {
global $user;
echo $user->uid;
}
?>