# Variable Naming

**URL:** <https://forum.kirupa.com/t/variable-naming/240477>\
**Category:** flash\
**Created:** [October 3, 2007, 12:00pm UTC](https://forum.kirupa.com/t/variable-naming/240477 "2007-10-03T12:00:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Qgeis](https://avatars.discourse-cdn.com/v4/letter/q/76d3ee/32.png) [@Qgeis](https://forum.kirupa.com/u/Qgeis)\
**Post date:** [October 3, 2007, 12:00pm UTC](https://forum.kirupa.com/t/variable-naming/240477/1 "2007-10-03T12:00:39Z")

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I’m using loadVars in AS2 Flash 8 and PHP returns this string

[COLOR=Blue]success=false&error\_message=xxx[/COLOR]

The [COLOR=Blue]success[/COLOR] variable traces fine but [COLOR=Blue]error\_message[/COLOR] is always **undefined**. Is it because the underscore is not allowed?