Change to php.ini 'pcre.backtrack_limit' setting on shared hosting server

A PHP script vendor has advised me to change the pcre.backtrack_limit setting and that I will need to reboot the server after doing so. I am on a shared hosting server running Apache Version 2.4.57 and cPanel Version 110.0 (build 9). Since I obviously can't reboot the server, will changes to this setting (in the public_html directory) take effect the next time the script is run even without a reboot? If not, what are my alternatives? CxFm