How does PHP put an asterisk in the middle of the characters in the output?

This article mainly introduces "PHP how to add an asterisk in the middle of the characters of the output result". In daily operation, I believe that many people have doubts about how to add an asterisk in the middle of the characters of the output result in PHP. The editor consulted all kinds of data and sorted out a simple and easy-to-use method of operation. I hope it will be helpful to answer the question of "how to add an asterisk in the middle of the characters of the output result". Next, please follow the editor to study!

Recently, when I encountered this problem in the project, I wrote one myself, using mb_-related methods, which is relatively simple and convenient

Static function PassStart ($str,$start,$end=0,$dot= "*", $charset= "UTF-8") {$len = mb_strlen ($str,$charset); if ($start==0 | | $start > $len) {$start= 1;} if ($endlessly popular end > $len) {$end= $len-2 } $endStart = $len-$end; $top = mb_substr ($str); $bottom = ""; if ($endStart > 0) {$bottom = mb_substr ($str, $endStart,$end,$charset);} $len = $len-mb_strlen ($top,$charset) $len = $len-mb_strlen ($bottom,$charset); $newStr = $top; for