Suppose i am building a custom form element with


Is there a way , in another module,to check this element's existence before inserting it to a form?

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You can invoke the hook yourself to check for the existence of a specific element type:

if (in_array('some_element_key', array_keys(module_invoke_all('element_info')))) {
  // The element type exists.
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  • Thanks, im pretty sure this will work, but as i tried with system_element_info(), i see that it runs before my hook_element_info() and does not contain my custom element, any logic to that? – Pan Chrono Nov 11 '13 at 14:51
  • Sorry I don't understand. The above code will give you all of the element types defined in the system, including any defined in custom modules – Clive Nov 11 '13 at 14:52
  • So the system_element_info() will give me only the system-provided ones? thats all.. – Pan Chrono Nov 11 '13 at 14:54
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    Good to clear that out, cheers – Pan Chrono Nov 11 '13 at 15:01
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    @PanChrono system is a module, just one provided by core that you can't disable. There really isn't anything terribly special about it. – mpdonadio Nov 11 '13 at 15:02

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