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Rafe Wilson
8 years ago
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1 + 1 Server-side technologies Apache,, Download: Apache Web Server: application server: DBMS: LAMP: is the integration of Linux, Apache, and Packages (Apache + + in a single installer): WAMP (Windows), / / MAMP (Mac), 2 1

com/downloads/ LAMP: is the integration of Linux, Apache, and Packages (Apache + + in a single

2 Application server Variables: $num = 58; $txt = "Hello World"; Operators: practically, the same as JavaScript (and Java, C, C++, ) Conditional constructs if (condition) ; elseif (condition) ; else ; 3 Application server Arrays: $cars = array("saab","volvo","bmw","toyota"); $cars[0]="saab"; $cars[1]="volvo"; $cars[2]="bmw"; $cars[3]="toyota"; Associative arrays: $ages = array("peter"=>32, "Quagmire"=>30, "Joe"=>34); $ages['peter'] '] = "32"; $ages['quagmire'] = "30"; $ages['joe'] = "34"; Also multidimensional 4 2

array("saab","volvo","bmw","toyota"); $cars[0]="saab"; $cars[1]="volvo"; $cars[2]="bmw"; $cars[3]="toyota"; Associative arrays:

3 Application server Loops: while (condition) { do { while (condition); for (init; condition; increment) { foreach ($array as $value) { 5 Application server Functions: <html> <body> function add($x,$y) { $total = $x + $y; return $total; echo " = ". add(1,16); </body> </html> 6 3

Application server Functions: <html> <body> function add($x,$y) {

4 Application server include() function:... <body> <div id="header">header page 1</div> <div id="content">content</div> <div id="menu"> include("menu.html"); </div> </body> <h2>menu</h2>... <ul> <li><a href="...">link1</a></li> <li><a href="...">link2</a></li> <li><a href="...">link3</a></li> File menu.html <li><a href="...">link4</a></li> <li><a href="...">link5</a></li> </ul> 7 Application server File management: $file = fopen("welcome.txt","r"); (r = Read only, starts at the beginning of the file; r+ = Read/Write, starts at the beginning of the file; w = write only, opens and clears the contents of file or creates a new file if it doesn't exist; w+ = read/write, opens and clears the contents of file or creates a new file if it doesn't exist; a = Append, opens and writes to the end of the file or creates a new file if it doesn't exist; a+ = Read/Append, preserves file content by writing to the end of the file; x = Write only, creates a new file, returns FALSE and an error if file already exists; x+ = Read/Write, creates a new file, returns FALSE and an error if file already exists) fclose($file); e); Row-by-row reading: while(!feof($file)) { echo fgets($file). "<br />"; 8 4

..">link5</a></li> </ul> 7 Application server File management: $file = fopen("welcome.

5 Database Opening a connection: "peter" "abc123"); if (!$con) { die('could not connect: '. mysql_error()); Closing a connection: Database creation: if (mysql_query("create DATABASE my_db",$con)) { echo "Database created"; else { echo "Error creating database: ". mysql_error(); 9 Database Table creation: CREATE TABLE table e_ name ( column_name1 data_type, column_name2 data_type, column_name3 data_type,... ) Entering data: INSERT INTO table_name (column1, column2, column3,...) VALUES (value1, value2, value3,...) 10 5

created"; else { echo "Error creating database: ".

6 Database Example (table creation): p... mysql_select_db("my_db", $con); $sql = "CREATE TABLE Persons ( FirstName varchar(15), LastName varchar(15), Age int )"; // Execute query mysql_query($sql,$con); 11 Database Example (data entering): p if (!$con) { die('could not connect: '. mysql_error()); mysql_select_db("my_db", $con); mysql_query("insert INTO Persons (FirstName, LastName, Age) VALUES ('Peter', 'Griffin', '35')"); mysql_query("insert INTO Persons (FirstName, LastName, Age) VALUES ('Glenn', 'Quagmire', '33')"); 12 6

$Execute query mysql_query($sql,$con); 11 Database Example (data entering): p if (!$con) { die('could not connect: '.$

7 Database Example (entering data received from a form): <form action="insert.php" method="post"> Firstname: <input type="text" name="firstname" /> Lastname: <input type="text" name="lastname" /> Age: <input type="text" name="age" /> <input type="submit" /> </form> if (!$con) { die('could not connect: '. mysql_error()); mysql _ select_ db("my y_ db", $con); $sql="insert INTO Persons (FirstName, LastName, Age) VALUES ('$_POST[firstname]','$_POST[lastname]', '$_POST[age]')"; if (!mysql_query($sql,$con)) { die('error: '. mysql_error()); mysql_close($con) 13 Database Example(Select): p if (!$con) { die('could not connect: '. mysql_error()); mysql_select_db("my_db", $con); $result = mysql_query("select * FROM Persons"); while($row = mysql_fetch_array($result)) { echo $row['firstname']. " ". $row['lastname']; echo "<br />"; 14 7

A table is a collection of related data entries and it consists of columns and rows.

A table is a collection of related data entries and it consists of columns and rows. CST 250 MySQL Notes (Source: www.w3schools.com) MySQL is the most popular open-source database system. What is MySQL? MySQL is a database. The data in MySQL is stored in database objects called tables.