Finds the substring before a specific target.This function is valid in v2.10.0 to v2.20.0. This function has been downloaded 22 times.
targetthat you want to key off of within
subject. If negative, the occurrence will be counted from the end of
targetwas not found or the specified occurrence (
targetwas not found,
nullwill be returned.
This function requires the following function which is included automatically: