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Please post the PHP code that is related to this question, thanks. &nbsp;Or if there is no PHP code, please ask a moderator to move the question to a more appropriate topic area.
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Please post the PHP code that is related to this question, thanks.  Or if there is no PHP code, please ask a moderator to move the question to a more appropriate topic area.

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I have found the solution myself.
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I am using Google docs to open .docx, .pdf and .xslx files. I am able to open .docx and .pdf but .xslx is giving this error<br />
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<b>Whoops! There was a problem displaying this image.</b><br />
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I am opening this file as <a href="https://docs.google.com/gview?url=http://mywebsite.com/files/isos/1490884247.xlsx" rel="ugc">https://docs.google.com/gview?url=http://mywebsite.com/files/isos/1490884247.xlsx</a><br />
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Please note that there is no permissions problem.
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I am using Google docs to open .docx, .pdf and .xslx files. I am able to open .docx and .pdf but .xslx is giving this error

Whoops! There was a problem displaying this image.

I am opening this file as https://docs.google.com/gview?url=http://mywebsite.com/files/isos/1490884247.xlsx

Please note that there is no permissions problem.

Opening .xlsx file in google docs

Microsoft Office is an integrated suite of applications that includes Outlook, Word, Excel, Access, PowerPoint, Visio and InfoPath, along with a number of tools to assist in making the individual components work together. Coding within and between the projects is done in Visual Basic for Applications, known as VBA.