PHP 1-1

PHP & SQL

Xingquan (Hill) Zhuxqzhu@cse.fau.edu

PHP 1-2

PHP&SQL

Relational Database systems Structured Query Language: SQL Access MySQL on Pluto server

Create table, add records, query, and delete records

PHP MySQL database access Connect to MySQL server Select database Query Show the results

PHP 1-3

Relational database systems A collection of tables of data

Each table can have any number of rows and columns of data The columns of a table are named

• Attributes Each row usually contains a value for each column Rows of a table are often referred to as entries Primary keys

• One column which uniquely identify the rows of the table Both data values and primary key values in a table are called

field

ID First_name Last_Name Lobster Crab Apple Orange Comments

1 Hill Zhu 2 1 2 0 Good

2 Hill Ford 1 2 0 0 Good

3 Ford James 0 0 1 1 Super

PHP 1-4

Structured Query Language: SQL Language for specifying access and modification

to relational database Different from most programming language

More like a structure form of English Reserved words are not case sensitive

SELECT and select are equivalent The whitespace separating reserved words and

clauses is ignored Commands can be spread across several lines

Simple SQL process Create database Use database Create table Add records Search records

PHP 1-5

Access SQL on Pluto Download putty (

http://www.chiark.greenend.org.uk/~sgtatham/putty/) Download -> putty.exe -> open

PHP 1-6

Access SQL on Pluto

Your fau IDUsername: Your fau ID

Password: Your fau ID

PHP 1-7

Access SQL on PlutoYour FAU ID again

MySql version

PHP 1-8

You are not able to create a database on Pluto, but select your own database

Use YourFAUID; You are only able to use your

own db, TSG created for you

PHP 1-9

Create a table

create table orderTbl(ID int not null primary key auto_increment, first_name varchar(30), last_name varchar(30), lobster int, crab int, apple int, orange int, comments varchar(30));

Table name, you name it

PHP 1-10

Insert Records

Insert into orderTbl(ID, first_name, last_name, lobster, crab, apple, orange, comments) values (1, “Hill”, “Zhu”, 2, 1, 2, 0, “Good”);

PHP 1-11

Query the database List all the records

Select * from orderTbl;

PHP 1-12

Query the database

Select first_name, last_name from orderTbl;

PHP 1-13

Query the database

Select * from orderTbl where first_name=“Hill”;

PHP 1-14

Delete records Delete from table where xx=y

Delete from orderTbl where last_name=“Ford”;

PHP 1-15

PHP&SQL

Relational Database systems Structured Query Language: SQL Access MySQL on Pluto server

Create table, add records, query, and delete records

PHP MySQL database access Connect to MySQL server Select database Query Show the results

PHP 1-16

An Important Step Login into pluto mySQL server Execute the following command

SET PASSWORD FOR ‘yourfauid’@’localhost’ = OLD_PASSWORD(‘yourfauid’);

Otherwise, you will not be able to connect to mySQL server Error message “Client does not support authentication protocol ” Some sort of protocol problem

PHP 1-17

Php connect to MySQL server Connect to a MySQL server

$db = mysql_connect($hostname, $username, $userpasswd);

Select database $er = mysql_select_db("customer", $db);

$hostname="localhost"; $username="hill"; $userpasswd="hill"; $db = mysql_connect($hostname, $username,

$userpasswd); if (!$db) { print ("Error - Could not connect to MySQL"); exit; }

Database.php

It’s YourFauId if use pluto

PHP 1-18

PHP SQL Query

$qresult = mysql_query($query); The query string should not end with a

semicolon. Return “false” on error Return a complex “resource” structure on

success

$num_rows = mysql_num_rows($qresult); $num_fields = mysql_num_fields($qresult); $row = mysql_fetch_array($qresult);

PHP 1-19

PHP SQL Query

$row = mysql_fetch_array($qresult); Calling Mysql_fetch_array() each time will return one

row of the retrieved records (from the top to the bottom)

$row is a special array It has two elements for each field The first element consists of the system assigned

key (0, 1, 2…) along with the field value The second element uses attribute name as the key

(“first_name”…), along with the field value So you can use either of the following forms

• $row[0], $row[1]….• $row[“first_name”], $row[“last_name”]….

PHP 1-20

PHP SQL Query

A simple PHP query example

Customer.html accesscustomer.php

PHP 1-21

PHP Insert A record

$sqlquery = INSERT INTO $table VALUES($id, $first_name, $last_name, $lobval, $crbval, $appval, $orgval,$comments);

Insert order information into the database

Formselection.php formcheckout.phpformprocesswithDB.phpmysqlDBProcess.inc

PHP 1-22

PHP&SQL

Relational Database systems Structured Query Language: SQL Access MySQL on Pluto server

Create table, add records, query, and delete records

PHP MySQL database access Connect to MySQL server Select database Query Show the results