php去掉字符串最后三个字符<?phpheader ('content-type:text/html;charset=utf-8'); $str = 'programming';echo "原字符串:{$str}php去掉字符串最后三个字符<?phpheader ('content-type:te
php去掉字符串最后三个字符<?phpheader ('content-type:text/html;charset=utf-8'); $str = 'programming';echo "原字符串:{$str}php去掉字符串最后三个字符<?phpheader ('content-type:te