请问在PHP里面这一段代码是表示什么
@iheader("Expires: 0");
@iheader("Cache-Control: private, post-check=0, pre-check=0, max-age=0", FALSE);
@iheader("Pragma: no-cache");
echo "<script language='javascript'> window.opener.location.reload(); self.close(); </script> ";
exit();
@iheader("Expires: 0");
@iheader("Cache-Control: private, post-check=0, pre-check=0, max-age=0", FALSE);
@iheader("Pragma: no-cache");
echo "<script language='javascript'> window.opener.location.reload(); self.close(); </script> ";
exit();
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