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PHP1-1 PHP & SQL Xingquan (Hill) Zhu xqzhu@cse.fau.edu
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PHP1-2 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
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PHP1-3 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 IDFirst_nameLast_NameLobsterCrabAppleOrangeComments 1HillZhu2120Good 2HillFord1200Good 3FordJames0011Super
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PHP1-4 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
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PHP1-5 Access SQL on Pluto Download putty (http://www.chiark.greenend.org.uk/~sgtatham/putty/)http://www.chiark.greenend.org.uk/~sgtatham/putty/ Download -> putty.exe -> open
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PHP1-6 Access SQL on Pluto Your fau ID Username: Your fau ID Password: Your fau ID
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PHP1-7 Access SQL on Pluto Your FAU ID again MySql version
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PHP1-8 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
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PHP1-9 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
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PHP1-10 Insert Records Insert into orderTbl(ID, first_name, last_name, lobster, crab, apple, orange, comments) values (1, “Hill”, “Zhu”, 2, 1, 2, 0, “Good”);
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PHP1-11 Query the database List all the records Select * from orderTbl;
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PHP1-12 Query the database Select first_name, last_name from orderTbl;
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PHP1-13 Query the database Select * from orderTbl where first_name=“Hill”;
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PHP1-14 Delete records Delete from table where xx=y Delete from orderTbl where last_name=“Ford”;
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PHP1-15 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
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PHP1-16 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
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PHP1-17 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
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PHP1-18 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);
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PHP1-19 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”]….
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PHP1-20 PHP SQL Query A simple PHP query example Customer.htmlaccesscustomer.php
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PHP1-21 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.phpFormselection.php formcheckout.phpformcheckout.php formprocesswithDB.php mysqlDBProcess.inc
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PHP1-22 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
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