Blacklisted/Whitelisted PHP that can be used in Calculated merge fields
See updated article in Actionstep Help Center: https://support.actionstep.com/hc/en-us/articles/360052811293-Blacklisted-Whitelisted-PHP-for-Calculated-Merge-Fields
See updated article in Actionstep Help Center: https://support.actionstep.com/hc/en-us/articles/360052811293-Blacklisted-Whitelisted-PHP-for-Calculated-Merge-Fields