my summer holiday English composition for interactive use with PHP4 and MySQL

1. Start by establishing a connection to the MySQL database.
First, we should create an infostar table in a database in MySQL:
Follow the steps for testing MySQL, and after seeing the "mysql>" prompt, manually create the table we need:
mysql>CREATE DATABASE mydb
mysql>USE mydb
mysql>CREATE TABLE infostar(
->name VARCHAR(25),
->email VARCHAR(25),
->choice VARCHAR(10));
Okay, the table is created.Next, create a meeting form with users (pure HTML file)
diaocha.htm

What fruit do you like

Email:

Name:
	Apple Orange Pear Coconut Watermelon Banana The format is as follows: What fruit do you like to eat? Name: Email: Please choose: Apple Orange Pear Coconut Watermelon Banana Next, create a PHP program to receive and process the information from the diaocha.htm form diaocha.php /* Define some related variables for the mysql_connect() function below*/ $hostname="localhost "; $username="root"; $password=""; $dbname="mydb"; /* Used to store the email address of the site administrator*/ $adminaddress="webmaster@youweb.com"; /* This is the table we just created to store user data*/ $userstable="infostar"; /* Create a connection below*/ mysql_connect($hostname,$username,$password) or die (" Unable to connect database"); /* Select the database mydb below. Adding the (@) symbol before the function will suppress the display of error messages.*/ @mysql_select_db("$dbname")or die("Unable ro select database"); print" "; print"Hello:$name."; print" "; print"Your email is:$email "; print"Thank you for your participation "; /* Insert the information into the table infostar*/ /* Because the database table was selected previously using the mysql_select_db function. Therefore, There is no need to enter the table name below*/ $query="INSERT INTO $userstable VALUES('$name','$email','$choice')"; $result=mysql_query($query); print "We have saved your information in the database."; /* Close the database connection*/ mysql_close(); ?> Note: If you are programming like the above: define the string variable at the beginning, modify it We have stored the information in the database, so how can we browse the data? Next, we try to list all the friends who like to eat apples and create the apple.php file apple.php /* Define some related variables for use by the mysql_connect() function below*/ $hostname="localhost"; $username="root"; $password=""; $dbname="mydb" ; $userstable="infostar" ; /* Establish a connection below and select the database*/ mysql_connect($hostname,$username,$password) or die ("Unable to connect database"); @mysql_select_db("$ dbname")or die("Unable ro select database"); /* Select all users who like Apple*/ $query="SELECT * FROM $userstable WHERE choice='apple'"; $result=mysql_query($ query); /* Calculate how many such users there are*/ $number=mysql_num_rows($result); /* Display the results*/ $i=0; IF ($number==0){ print" No one likes Apple ";} ELSE{ print" Users who like to eat apples are: $number "; WHILE ($i$name=mysql_result($result,$ i,"name"); $email=mysql_result($result,$i,"email"); print"$name likes to eat apples "; print"Email address: $email < ;br>"; $i++; endwhile; print" "; } ?> Call apple.php in the browser and see what appears. The above introduces the interactive use of PHP4 and MySQL in my summer holiday English composition, including the content of my summer holiday English composition. I hope it will be helpful to friends who are interested in PHP tutorials.