mercuryboard has exited with an error

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preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead

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Unknown Error [8192]:
The error was reported on line 847 of /home/subhash/public_html/sites/itools/forum/global.php

Code:
845         while ($template = $this->db->nqfetch($temp_query))
846         {
847             $template['template_html'] = preg_replace('~<IF (.*?)(?<!\-)>(.*?)</IF>~se', '$this->get_templates_callback(\'\\1\', \'\\2\', $template[\'template_name\'])', $template['template_html']);
848             $templates[$template['template_name']] = $template['template_html'];
849         }

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