1. Assignment help PHP + MySQL crash course
2019/5/14
Assignment help PHP + MySQL crash course
Minpeng Zhu

2. Assignment
Implement a web application for movie management with movie database as data storage and a web front-end using the Linux-Apache-MySQL-PHP, or LAMP, Web development framework
To be completed in groups (3-5)
Deploy solution
See TA in the lab to get a MySQL account for your group
Demo your solution during the scheduled labs or send solution (URL + source) by to TAs by
2019/5/14
Gyozo Gidofalvi

3. Connecting to MySQL from PHP
$hostname = "linne.it.uu.se";
$username = "…";
$password = "…";
$link = mysql_connect($hostname, $username, $password)
or die("Could not open connection to database");
?>
Now the variable $link contains the information for your connection to MySQL. You can disconnect using:
mysql_close($link)
or die("Could not close connection to database");
2019/5/14
Gyozo Gidofalvi

4. Select a database, issue queries
Once you have connected successfully, you should select the database you will use. Then you can issue queries to the database.
<?php
mysql_select_db(“your DB name", $link)
or die("Could not select database");
$result = mysql_query("select * from some_table")
or die("Could not issue MySQL query");
?>
Now the variable $result holds the query resultset.
No ; at the end
2019/5/14
Gyozo Gidofalvi

5. Printing the results from a query
After issuing a query, you retrieve the results using the variable $result. Mysql_fetch_row function fetches each record from resultset in $result.
<?php
$result = mysql_query("select * from book_table")
if (mysql_num_rows($result) == 0) {
print("No results matching your query<BR>\n");
} else {
print("Here are the results:<BR>\n");
//Fetching one row with mysql_fetch_row()
while ($row = mysql_fetch_row($result)) {
print "<td>".("$row[1] ")."</td>";
print "<td>".("$row[2] ")."</td>";
print "<td>".("$row[3] ")."</td>";
print "<td>".("$row[4] ")."</td>"; …
print("</tr>"); }
?>
2019/5/14
Gyozo Gidofalvi

6. Printing the results from a query
Alternative, it is typically also each() and list() are used together to traverse an array.
<?php
$result = mysql_query("select * from book_table")
if (mysql_num_rows($result) == 0) {
print("No results matching your query<BR>\n");
} else {
print("Here are the results:<BR>\n");
//Fetching one row with mysql_fetch_row()
while ($row = mysql_fetch_row($result)) {
while (list($key, $value) = each($row)) {
print("$value "); }
print("<BR>\n");
?>
2019/5/14
Gyozo Gidofalvi

7. The above example would be used to show book data from a book table in a following way. e.g,
BookName
Publish year
Price
Rating
Database
2000
500 5
2019/5/14
Gyozo Gidofalvi

8. HTML forms and PHP variables
From an HTML page that had this form:
<FORM ACTION="target.php" METHOD="GET">
<INPUT TYPE="TEXT" NAME="myvar">
<INPUT TYPE="TEXT" NAME="yourvar">
<INPUT TYPE="SUBMIT" NAME="submit">
</FORM>
The PHP script (target.php) will receive the variables value from the form by the same name:
<?php
$myvar = $_GET[myvar];
$yourvar = $_GET[yourvar]
print("you entered $myvar and $yourvar");
?>
2019/5/14
Gyozo Gidofalvi

9. Drop down list usage
Example of filling drop down list value from a database table.
<tr><td>Category</td>    <td>    <select name=“Category">    <?php       $result = mysql_query("select name from category_table");       while($row = mysql_fetch_row($result))        {          print("<option>$row[0]</option>");         }      ?>     </select>     </td></tr>
2019/5/14
Gyozo Gidofalvi

10. Technique reference http://www.w3schools.com/
2019/5/14
Gyozo Gidofalvi