When you use include at the top of the page, a blank line is displayed, and the CSS is not normal, and the workaround
Page is UTF-8 encoded
Editor: Dreamweaver page properties have been checked for include Unicode signature (BOM) (s)
This will display a blank line at the top of the page and see what the source code is all about:
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Make sure it's not code-generated, right? If it is determined that the code is not generated, change the editor with Utf-8 no BOM header code to save a bit.
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File encoding If it is utf-8, the head will occupy 3 characters, the file changed to no BOM look.
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"Dreamweaver page properties have been checked for including Unicode signature (BOM) (s)"
In the DW, press ctrl+j, encode, and then do not tick, PHP itself is not able to identify the BOM header information, so there will be cookies, SESSION, blank anomalies and other conditions
