Interactive use of PHP4 and MySQL_PHP tutorial

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 of testing MySQL and manually create the table we need after seeing the "mysql>" prompt:

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

;

Name:
Email:
Please select:	Apple Orange Pear Coconut Watermelon banana

its format As follows:

What fruit do you like to eat
Name:                                                                                                                                                                                                    but >
Let’s create a PHP program to receive and process the information from the diaocha.htm form

diaocha.php

/* Define some related variables, For use by 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" ;

/* Establish 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

";


/* Put The information is inserted into the table infostar*/
/* Because the database table was selected using the mysql_select_db function earlier. 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();
?> Easy.

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 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 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

";
$i++;
endwhile;
print"

";
} 
?> ;

Call apple.php in the browser and see what appears.

http://www.bkjia.com/PHPjc/315735.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/315735.htmlTechArticle1. Start by establishing a connection to the MySQL database. First, we should create an infostar table in a database in MySQL: Follow the steps of testing MySQL and see "mysq...