PHP turns the full-width spaces into half-width, and removes the leading and trailing spaces ____php

<?php/* Font conversion $content content $to _encoding target encoding, the default is UTF-8 $from _encoding source code, the default is GBK/function Mbstrreplace ($content, $to _e Ncoding= "UTF-8", $from _encoding= "GBK") {$content =mb_convert_encoding ($content, $to _encoding, $from _encoding); $str = Mb_convert_encoding ("", $to _encoding, $from _encoding); $content =mb_eregi_replace ($str, "", $content); $content =mb_convert_encoding ($content, $from _encoding, $to _encoding); $content =trim ($content); return $content; }?>

PHP turns full-width spaces into half-width, and removes the trailing spaces

1. Turn the GBK string into UTF-8,

2. Convert full-width spaces into UTF-8

3. Change the replacement string to GBK

4. Remove the trailing space

5. Return string