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You need to make sure that Apache runs the .php before outputting the result. If you don't have php set up properly on the server, then Apache will show the contents of the .php files, rather than running them.<br />
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If you have .php files which contain passwords etc, it's advisable to make them 'include' which php accesses indirectly, then prevent Apache for ever serving them, by adding a .htaccess file and denying access to those files over HTTP.<br />
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Hope that helps<br />
JP
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You need to make sure that Apache runs the .php before outputting the result. If you don't have php set up properly on the server, then Apache will show the contents of the .php files, rather than running them.

If you have .php files which contain passwords etc, it's advisable to make them 'include' which php accesses indirectly, then prevent Apache for ever serving them, by adding a .htaccess file and denying access to those files over HTTP.

Hope that helps
JP

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Good point about the passwords -- one other option is to put the passwords in includes outside of your web directory alltogether, which doesn't involve setting up an .htaccess file 
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Good point about the passwords -- one other option is to put the passwords in includes outside of your web directory alltogether, which doesn't involve setting up an .htaccess file

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Yes, the latter is preferable but not always an option given by ISPs
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Yes, the latter is preferable but not always an option given by ISPs

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I done a a project in PHP and MySQL.<br />
<br />
I would like to upload that into the webserver. but how to secure those files to direct download or see the source code of those php files. <br />
<br />
how to secure my php files?
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I done a a project in PHP and MySQL.

I would like to upload that into the webserver. but how to secure those files to direct download or see the source code of those php files. 

how to secure my php files?

PHP Files Security in webserver

PHP is a widely-used server-side scripting language especially suited for web development, powering tens of millions of sites from Facebook to personal WordPress blogs. PHP is often paired with the MySQL relational database, but includes support for most other mainstream databases. By utilizing different Server APIs, PHP can work on many different web servers as a server-side scripting language.