PHP Tutorial - Part 1 - The Diigo Meta page

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  • PHP scripts are always enclosed in between two PHP tags
  • <?
     PHP Code In Here
     ?>
     
     <?php
     PHP Code In Here
     php?>
     
     <script language="php">
     PHP Code In Here
     </script>
  • All of these work in exactly the same way but in this tutorial I will be using the first option (<? and ?>).
  • start and end your code with the same tag (you can't start with <? and end with </script> for example).
    

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  • you web host will need to have PHP set up on their server. It should be listed as part of your package but if you don't know if it is installed you can find out using the first script in this tutorial. If you server does not support PHP you can ask your web host to install it for you as it is free to download and install. If you need a low cost web host which supports PHP I would recommmend HostRocket.
  • PHP scripts are always enclosed in between two PHP tags. This tells your server to parse the information between them as PHP. The three different forms are as follows:
     
  • The first PHP script you will be writing is very basic. All it will do is print out all the information about PHP on your server. Type the following code into your text editor:
     
     <?
     phpinfo();
     ?>
  • at the line ends in a semicolon. This is very important. As with many other scripting and programming languages nearly all lines are ended with a semicolon and if you miss it out you will get an error.
  • If, instead of a page being displayed, you are prompted to download the file, PHP is not installed on your server and you should either serach for a new web host or ask your current host to install PHP.

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