<?php
/**
* Test Doc
*
* PHP version 7
*
* @category File_Test
* @package File_Test1
* @author WordPressLeaf <1794674215@qq.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU General Public License
* @link Http://www.wordpressleaf.com
*/
$d = '12';
$c = '23';
echo $e = $d . $c;
一个标准的PHP文件头需要包含文档名称，php版本信息，分类，包体，作者，许可证书，链接。
结束
你学会了吗？
Warning: copy(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 546
Warning: copy(): Failed to enable crypto in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 546
Warning: copy(https://www.wordpressleaf.com/wp-content/themes/summerleaf/images/tx/27.png): failed to open stream: operation failed in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 546
Warning: copy(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 562
Warning: copy(): Failed to enable crypto in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 562
Warning: copy(https://www.wordpressleaf.com/wp-content/themes/summerleaf/images/tx/34.png): failed to open stream: operation failed in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 562
