[phpesp-general] Call to undefined function: _addslashed()

[Mike A. <mic...@ed...>]

phpESP v1.8-rc1 using PHP 4.3.8 and apache on linux.
Clicking any button on the Order tab, (eg. to change the order of 
questions, or remove a question) gives:

Fatal error: Call to undefined function: _addslashed() in 
/var/www/html/phpESP/admin/include/function/survey_update.inc on line 
311