CSC220 Lab 7 MySQL -- 2010
--D. Thiebaut 16:39, 27 October 2010 (UTC)
Reference Program
- Use the following program as reference for your own program.
<?php
// mysqlSkel.php
// D. Thiebaut
include 'accessinfo.php';
//--- connect to mysql server ---
$link = mysql_connect( $hostName, $userName, $password );
if ( ! $link )
die( "Could not connect to server: " . $mysql_error() );
//--- select database ---
$db = mysql_select_db( $database, $link );
if ( ! $db )
die( "Could not connect to database " . $database . ": "
. mysql_error() );
//--- insert new user in table users ---
$newUser = "Joanna";
$query = sprintf( "INSERT INTO `users` (`userName`) VALUE ('%s')", $newUser );
$result = mysql_query( $query, $link );
if ( ! $result )
printf( "Insertion of user %s unsuccessful\n", $newUser );
//--- list first row of table ---
$query = sprintf( "SELECT * from `users` LIMIT 1" );
$result = mysql_query( $query, $link );
if ( ! $result )
die( "Invalid query (" . $query . "): " . mysql_error() );
if ( $row = mysql_fetch_array( $result, MYSQL_NUM ) ) {
for ( $i=0; $i<count( $row ); $i++)
printf( "%s\t", $row[$i] );
print "\n";
}
//--- close database ---
mysql_close( $link );
?>
Part 1
- create a file in your directory called accessinfo.php with the following contents (where you will replace the xxxx fields with appropriate values for you):
<?php
$hostName='xgridmac.xxxx.xxx';
$userName='220a-xx';
$password='xxxxxx';
$database='220a-xx';
?>
- Question 1
- Write a php program that displays the whole contents of the table users in your database.
- Question 2
- Once you have the code working, put the reading of the table in a function that can be called as follows:
displayTable( 'users', $link );
- i.e. where you pass the name of the table as a parameter to the function. When the function works, make it display all 3 tables
displayTable( 'users', $link ); displayTable( 'items', $link ); displayTable( 'orders', $link );
- Question 3
- Write a function that will insert new users into the table users. You do not need to make the table a parameter of the function.
Part 2
- Use the program below as a starting point, and create a self-loading form that will ask the user for a name and add it to the table of users. The form, when it reloads will display the contents of the table users on the browser.
<!--
formskel.php
D. Thiebaut
A skeleton form that contains 1 text field and
loads up the information in the database
defined in the file accessinfo.php, whose
contents are show below:
$hostName='xgridmac.xxxxxx.xxx';
$userName='220a';
$password='xxxxxx';
$database='220a-xx';
-->
<html>
<head>
</head>
<body>
<?php
//----------------------------------------------------------------
function openDBAddUserClose( $name ) {
include 'accessinfo.php';
//--- connect to mysql server ---
$link = mysql_connect( $hostName, $userName, $password );
if ( ! $link ) {
printf( "Could not connect to server: " . $mysql_error() );
return 0;
}
//--- select database ---
$db = mysql_select_db( $database, $link );
if ( ! $db ) {
printf( "Could not connect to database " . $database . ": "
. mysql_error() );
return 0;
}
//--- insert new name in table users ---
$query = sprintf( "INSERT INTO `users` (`userName`) VALUE ('%s')", $name );
$result = mysql_query( $query, $link );
$retVal = 1;
if ( ! $result ) {
printf( "Insertion of user %s unsuccessful\n", $name );
$retVal = 0;
}
//--- close database ---
mysql_close( $link );
return $retVal;
}
//----------------------------------------------------------------
function printForm( $name ) {
printf( '<form action="formskel.php" method="post">
Name: <input type="text" name="name" VALUE="%s" SIZE="40">
<input type="submit" value="Send">
</form>', $name );
}
//----------------------------------------------------------------
function success( $name ) {
printf ( "<h2>Success!</h2><br>%s has successfully been added\n",
$name );
}
//----------------------------------------------------------------
function error( $name ) {
printf( "<h3><font color=\"red\">There was an error inserting %s in database</font></h3>\n",
$name );
}
//----------------------------------------------------------------
// M A I N
//----------------------------------------------------------------
//--- get user input ---
$name = $_REQUEST[ 'name' ];
//--- if set, add it to database ---
if ( !empty( $name ) ) {
$retVal = openDBAddUserClose( $name );
if ( $retVal )
success( $name );
else
error( $name );
}
//--- show empty form for getting next input---
unset( $name );
printForm( $name );
?>
</body>
</html>
