php - echo the contents of a File to the user but make it act as a download -

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I have a script where I get the contents of a file and then it resonates on the screen, the problem is that An example of a binary file on the page, what should I do if it works like a download where the download dialog will appear.

How can I get it?

From the PHP manual: 

  // We have a PDF header output ('Content-type: app / pdf'); // it will be downloaded .pdf header ('content-dispute: attachment; filename =' downloaded PDF ''); // pdf source is in original PDF readfile ('original PDF');  < / Pre> 
 Change the content-type and file name. You can readfile the user on file_get_contents, but either work or

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