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PHP Frequently Asked Questions

  1. What is PHP?
  2. What version of PHP is installed on the server?
  3. How does Expedient run PHP?
  4. Can I use PHP in conjunction with mySQL?
  5. Where can I find additional PHP documentation?
  6. Are there PHP resource limits on Expedient's servers?
  7. Can I run PHP scripts anywhere on my virtual server?
  8. What permissions do I need to use on my PHP scripts?



  1. What is PHP?

    From the PHP Manual: "PHP (recursive acronym for "PHP: Hypertext Preprocessor") is a widely-used Open Source general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. The goal of the language is to allow web developers to write dynamically generated pages quickly."

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  2. What version of PHP is installed on the server?

    The Expedient servers have PHP 4.3.1 installed.

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  3. How does Expedient run PHP?

    Expedient has installed PHP as an Apache module, not as a CGI binary. Because it was not installed as a binary, scripts do not need to use a "#!//php" header. Simply give your PHP files a .php3 file extension and they will run.

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  4. Can I use PHP in conjunction with mySQL?

    Yes. One of the advantages of PHP is the ability to interface with databases, including MySQL. If MySQL is included in your service, you can use PHP as a front-end to your MySQL database(s). See the Unix Database FAQ for specific information on installing and running MySql on your site.

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  5. Where can I find additional PHP documentation?

    Additional documentation can be found at the official PHP website: http://www.php.net. The site contains manuals and FAQs as well as an Introductory Tutorial for those new to PHP. Also see the PHP Manual from Zend.com.

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  6. Are there PHP resource limits on Expedient's servers?

    Expedient has set PHP resource limits as follows:
    • Maximum execution time (CPU run time): 30 seconds
    • Memory limit per process: 8MB

    These limits are necessary to prevent run-away processes and overuse of resources.

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  7. Can I run PHP scripts anywhere on my virtual server?

    PHP scripts will run from anywhere on your virtual server. They do not need to be stored in any specific directory such as /cgi-bin/.

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  8. What permissions do I need to use on my PHP scripts?

    To avoid problems, you should set your PHP scripts permission to 755.

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