Re:Proposal: Please consider introducing a new function |str_cut| to make fast cutting for a string

Christoph Becker just authored a StringBuilder extension which may serve as base for futher exploration at https://github.com/php/php-src/pull/3483#issuecomment-418696660 which I believe means a long-term effort to solve the issue in this respect. I am also wondering if the StringBuilder can go into the agenda of PHP intervals. If so, is this str_cut still needed anyway? Is StringBuilder just enough? Or both of them(StringBuilder and str_cut) are still okay to be provided? Any thoughts? I am happy to see either. 在2018年09月01 18時59分，"張俊芝"<zjz@zjz.name>寫道： Hello. I'd like to suggest PHP introduce a new function |str_cut| to make fast cutting of a string. If the user wants to cut a large string to a still-very-large string(say, cutting a 1KB string from a larger string), |str_cut| would be a far more efficient alternative solution than |substr|: str_cut($str, 1024) vs $str = substr($str, 0, 1024) |str_cut| works by *directly* reseting the len value of the string. And I have created a first-draft PR at https://github.com/php/php-src/pull/3483 , I am also going to create an RFC. I am looking forward to your thoughts. Zhang Junzhi