Faculty.cse.tamu.edu
PHP and MySQL
How PHP and MySQL will work together
• the PHP script located anywhere on your GL will communicate with UMBC’s DB server
o as long as you have the given “CommonMethods.php” file
• the PHP script will request the data from the DB server
o PHP script will have MySQL code in it!!
• DB server will then respond with the data
• notice the web user NEVER interacts directly with the DB server
• CommonMethods.php contains the
o link to the DB server
o your username and password
|UMBC’s PHP and MySQL server setup |
|[pic] |
Pre-created CommonMethods.php file
• pre-created PHP file that has common methods you need
o saves coding
o saves time
o file can be included by OTHER PHP files
▪ that you will create
• the file placement
o needs to be SOMEWHERE in your www directory
o please only have one copy, so no inconsistencies
o other files can use relative path to link to this file
|Directory Setup |
|[pic] |
|relative URL paths |
|Link |meaning |
|1 |include('CommonMethods.php'); |this file is in the SAME directory as CommonMethods |
|2 |include('../CommonMethods.php'); |this file is one directory deeper than CommonMethods |
|3 |include('../../CommonMethods.php'); |this file is two directories deeper than CommonMethods |
|[pic] |
What do you do with CommonMethods File
• look at the file given
o notice there are some functions already created for you
▪ connect ( connects to the UMBC DB server given to you
▪ executeQuery ( just like it sounds
• YOU need to change
o Username and Password
▪ username shows up twice
• Do not share your version since it will have YOUR username and password
Dynamically entering data in the DB
• dynamic since the USER will be creating the data
o will have a form on the HTML page
• our PHP Script will accept and enter the data into the DB
• make sure your table is already in place!!
|Dynamically entering data in the DB |
|[pic] |
• Starting with the HTML Document
o needs a form with inputs to send to the PHP script
▪ list of input (HTML5!!)
•
o no “CommonMethods.php” needed since THIS document does NOT have direct access to the DB
▪ nor can it since it’s not a php page
|Example HTML to enter Dynamic Data |
|HTML Code |HTML Rendered |
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• Accepting the dynamic data with the PHP page
o will need “CommonMethods.php” since we will dump data into DB
• will complete in stages
o vardump
▪ just to see that the data entered matched
▪ great tool to use
o db setup and data entry
▪ using “CommonMethods.php” and other code shown previously
▪ need MySQL setup
• make sure DB table is already in place
|Example DB Table |
|[pic] |
|Two Stages of the PHP Script |
|Stage 1 Var_dump |
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|Stage 2 DB Entry |
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