GettingStartedWithPHP

Install Webserver
Linux

http://www.apachefriends.org/en/xampp-linux.html

An introductory example
<!DOCTYPE HTML PUBLIC "-//W3C//
DTD HTML 4.01 Transitional//EN"
    "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <title>Example</title>
    </head>
    <body>

        <?php
            echo "Hi, I'm a PHP script!";
        ?>

    </body>

Our ﬁrst PHP script
<html>
<head>
<title>PHP Test</title>
</head>
<body>
<?php echo '<p>Hello World</p>'; ?>
</body>
</html>

Our ﬁrst PHP script
<html>
<head>
<title>PHP Test</title>
</head>
<body>
<p>Hello World</p>
</body>
</html>

Get system information
from PHP

<?

PHP Variables
<?php
$var = 'Bob';
$Var = 'Joe';
echo "$var, $Var"; // outputs "Bob, Joe"

// invalid; starts with a number
$4site ='not yet';

?>

Reference Variable
<?php
// Assign the value 'Bob' to $foo
$foo = 'Bob';
// Reference $foo via $bar.
$bar = &$foo;
// Alter $bar...
$bar = "My name is $bar";
echo $bar;
// $foo is altered too.
echo $foo;
?>

PHP Arrays
$ php array.php
Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
[6] => a
[7] => b
[8] => cat
[9] => dog
)

PHP : Functions
<?php
function a($n){
b($n);
return ($n * $n);
}

function b(&$n){
$n++;
}

echo a(5); //Outputs 36
?>

PHP: Functions
(global statement)
<?php
$foo = 1;
bar(); // call function
function bar()
{

global $foo;

$foo++;

echo "$foo in function bar() = " . $foo."n";
}
echo "$foo in main = " . $foo."n";
?>
Outputs
$foo in function bar() = 2
$foo in main = 2

Standard Input (Keyboard)

echo "Enter Username : ";

$username = fgets (STDIN, 1024);

echo "Enter Password : ";

$password = fgets (STDIN, 1024);

Standard Functions
array_push
trim
print_r
var_dump

My website

http://www.together.in.th

GettingStartedWithPHP

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