PHP and MySQL PHP for the Web, page

PHP and MySQL MySQL Resource PHP – MySQL Resource Google “MySQL Create table” Google “PHP MySQL how to connect?”

MySQL Database server that is “almost free” Integrated into Apache Web Server and PHP PHP has many functions that can be used to interact with a MySQL server – Connect to a server – Query a server – Process query results

PHP: How to connect to a MySQL Server $link = mysql_connect( server, user, password); mysql_select_db(database_name, $link); mysql_connect return a “resource” A resource is a special variable type, holding a reference to an external resource.

Resources in PHP

PHP: How to run a query $link = mysql_connect( server, user, password); mysql_select_db(database, $link); $result = mysql_query(“SELECT * FROM table”); mysql_query returns a “resource” In this case $result is a link to a mysql resource.

PHP: mysql_fetch_array $q = “SELECT fname, lname FROM people WHERE userid = 65”; $result = mysql_query($q); $row = mysql_fetch_array($result); echo $row[‘fname’]. “ ”. $row[‘lname’]; Typically a query returns a table (a collection of rows). This query return one row.

PHP: mysql_fetch_array $q = “SELECT fname, lname FROM people”; $result = mysql_query($q); $row = mysql_fetch_array($result); echo $row[‘fname’]. “ ”. $row[‘lname’]; This query returns more than one row. We only print the fname and lname of the first returned row

PHP: mysql_fetch_array $q = “SELECT fname, lname FROM people”; $result = mysql_query($q); while ( $row = mysql_fetch_array($result) ) echo $row[‘fname’]. “ ”. $row[‘lname’]; mysql_fetch_array return null when it reaches the end of query results PHP interprets null as false

PHP: How to get query results