How to open a php file in Wamp always pops up the File Upload dialog box

How to open a php file in Wamp always pops up the file Download dialog box
In the WAMP environment do not know that the module is turned on, in the Eslipse open PHP will pop up the "File download" dialog box?

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Failed to parse PHP, install PHPEclipse No
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If you're running in a browser, don't take care of it.
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Was it accessed through http://localhost/tt.php?

Phpinfo (); Can display PHP information
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You find in apache2.conf or httpd.conf have the following PHP parsing settings, no, add

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   SetHandler application/x-httpd-php
  
  
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