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This function checks for the existence of page-level item within the current page of an application. This function requires the parameter p_item_name. This function returns a Boolean value (true or false).
Syntax
APEX_CUSTOM_AUTH.APPLICATION_PAGE_ITEM_EXISTS(
    p_item_name   IN    VARCHAR2)
RETURN BOOLEAN;
Parameters
Table: APPLICATION_PAGE_ITEM_EXISTS Parameters describes the parameters available in the APPLICATION_PAGE_ITEM_EXISTS function.
APPLICATION_PAGE_ITEM_EXISTS Parameters
| Parameter | Description | 
|---|---|
| 
 | The name of the page-level item. | 
Example
The following example checks for the existence of a page-level item, ITEM_NAME, within the current page of the application.
DECLARE
    L_VAL BOOLEAN;
BEGIN
    VAL := APEX_CUSTOM_AUTH.APPLICATION_PAGE_ITEM_EXISTS(:ITEM_NAME);
    IF L_VAL THEN
        htp.p('Item Exists');
    ELSE
        htp.p('Does not Exist');
    END IF;
END;