Javascript debugger
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handler is a string containing the name of a function that must exist when xml_parse() is called for parser.
The function named by handler must accept two parameters:
parser
, is a
reference to the XML parser calling the handler.
If a handler function is set to an empty string, or FALSE
, the handler
in question is disabled.
Instead of a function name, an array containing an object reference and a method name can also be supplied.