它与要求相同, 但是只有一次包含了外部文件。
例子1
另存为page1.php
另存为page2.php
输出
来源：
https://www.srcmini02.com/29384.html
PHP require_once包含文件
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Warning: get_headers(): SSL operation failed with code 1. OpenSSL Error messages: error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed in /mydata/web/wwwshanhubei/web/wp-content/themes/shanhuke/single.php on line 57
Warning: get_headers(): Failed to enable crypto in /mydata/web/wwwshanhubei/web/wp-content/themes/shanhuke/single.php on line 57
Warning: get_headers(https://static.shanhubei.com/qrcode/qrcode_viewid_37963.jpg): failed to open stream: operation failed in /mydata/web/wwwshanhubei/web/wp-content/themes/shanhuke/single.php on line 57
