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The document discusses connecting to and interacting with a MySQL database from PHP, including connecting to MySQL, creating databases and tables, inserting, updating, and deleting data. Key points covered are using mysql_connect() to connect to MySQL, mysql_query() to execute queries like CREATE, INSERT, UPDATE and DELETE, and retrieving and displaying form data submitted from PHP to insert new records.
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More Php
- 1. More PHP & MYSQL
- 2. Connecting to MYSQL mysql_connect(servername,username,password); <?php $con=mysql_connect('localhost','root',''); if (!$con) { die('Could not connect: ' . mysql_error()); } ?>
- 3. Creating a MYSQL Database CREATE DATABASE database_name <?php $con = mysql_connect('localhost', 'root', ''); if (!$con) { die('Could not connect: ' . mysql_error()); } if (mysql_query('CREATE DATABASE my_db',$con)) { echo "Database 'my_db' created"; } else { echo "Error creating database: " . mysql_error(); } mysql_close($con); ?>
- 4. Creating a MYSQL Table CREATE TABLE table_name ( column_name1 data_type, column_name2 data_type, ....... ) <?php $con = mysql_connect('localhost', 'root', ''); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db('my_db', $con); $sql = 'CREATE TABLE person ( FirstName varchar(15), LastName varchar(15), Age int )'; mysql_query($sql,$con); mysql_close($con); ?>
- 5. Insert Using PHP Inserting data to MySQL is done by using mysql_query() to execute INSERT command. Note that the query string should not end with a semicolon. Below is an example of adding a new MySQL person by inserting a new row into table person in database “my_db” <?php $con = mysql_connect('localhost', 'root', ''); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db('my_db', $con); $query = 'INSERT INTO person (Firstname, Lastname, Age) VALUES ("Jesus", "Christ", 33)'; mysql_query($query) or die('Error, insert query failed'); mysql_close($con); ?>
- 6. Insert Using FORMS and PHP <?php if(isset($_POST['add'])){ $dbhost = 'localhost'; $dbuser = 'root'; $dbpass = ''; $conn = mysql_connect($dbhost, $dbuser, $dbpass) or die ('Error connecting to mysql'); $dbname = 'my_db'; mysql_select_db($dbname); $CFName = $_POST['CFName']; $CSName = $_POST['CSName']; $CAge = $_POST['CAge']; $query = $query = "INSERT INTO person (Firstname, Lastname, Age) VALUES ('$CFName', '$CSName', $CAge)"; mysql_query($query) or die('Error, insert query failed'); mysql_close($conn); echo "person added to database"; } else{ ?>
- 7. FORM Insert cont. <form method="post"> <table width="400" border="0" cellspacing="1" cellpadding="2"> <tr> <td width="100">first name</td> <td><input name="CFName" type="text" id="CFName"></td> </tr> <tr> <td width="100">second name</td> <td><input name="CSName" type="text" id="CSName"></td> </tr> <tr> <td width="100">age</td> <td><input name="CAge" type="text" id="CAge"></td> </tr> <tr> <td width="100"> </td> <td><input name="add" type="submit" id="add" value="Add New Contact"></td> </tr> </table> </form> <?php } ?>
- 8. Data Update Using PHP Use mysql_query() to execute the UPDATE or DELETE statement. For instance, to update the age in a MYSQL table for name “Jesus”, execute an UPDATE statement with mysql_query() like this: <?php $con = mysql_connect('localhost', 'root', ''); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db('my_db', $con); $query = 'UPDATE person SET Age = (55) WHERE Firstname = "Jesus"'; mysql_query($query) or die('Error, insert query failed'); mysql_close($con); ?>
- 9. Good Websites http://www.php-mysql-tutorial.com/ DMX Zone