摘要：
当你在使用phpoffice/phpexcel 类库时候。composer 会给你提示一句话 Package phpoffice/phpexcel is abandoned, you should avoid using it. Use phpoffice/phpspreadsheet instea 阅读全文
摘要：
1 $str = "Hello World!"; 2 echo $str . "<br>"; 3 echo trim($str," "); 阅读全文