kathleen shane sandigan

Lesson 1

Your First Script:

The time is
<!–?php echo date(‘H:i:s’);?>
and the date is
<!–?php echo date(‘j F Y’;?>

Output:

The time is

15:33:09 and the date is

13 October 2004

The Echo Command:

<?php
echo “The time is “;
echo date(‘H:i:s’);
echo ‘ and the date is ‘;
echo date(‘j F Y’);
?>

Output:

The time is 15:59:50 and the date is 13 October 2004

Lesson 2

Understanding Variables:

<?php
$name = “Chris” ;
echo “Hello” ;
echo $name ;
?>

Output: Hello, Chris

Expressions:

<?php
$sum = 16 + 30;
echo $sum;
?>

Output: 46

Variable in Strings:

<?php
$name = “Chris”;
echo “Hello, $name”;
echo ‘Hello, $name’;
?>

Output: Hello, Chris

Hello, $name

Lesson 3

Conditional Statements:

<?php

$number = 5;

If ($number < 10) {

echo “$number is less than ten”;

}

Output: 5 is less than ten

Logical Operators:

<?php

$number = 8;

if ($number >= 5 and $number <= 10) {

echo “$number is between five and ten”;

}

Output: 8is between five and ten

Multiple Condition Branches:

<?php

$number = 16;

if ($number < 10) {

echo “$number is less than ten”;

}

else {

echo “$number is more than ten”;

}

Output: 16 is more than ten

Switch Statements:

<?php

$name = “Damon”;

Switch ($name) {

case “Damon”:

case “Shelley”:

echo “Welcome, $name, you are my friend”;

break;

case “Adolph”:

case “Saddam”:

echo “You are no friend of mine, $name”;

break;

default:

echo “I do not know who you are, $name”;

}

Output: Welcome, Damon, you are my friend

While Loop:

<?php

$count = 1;

while ($count <= 10) {

$square = $count * $count;

Echo “$count squared is $square <br>;”

$count++;

}

Output:

1 squared is 1

2 squared is 4

3 squared is 9

4 squared is 16

5 squared is 25

6 squared is 36

7 squared is 49

8 squared is 64

9 squared is 81

10 squared is 100

The do Loop:

<?php

$count = 1;

do {

$square = $count * $count;

echo “$count squared is $square <br>”;

$count++;

} while ($count <= 10);

Output:

1 squared is 1

2 squared is 4

3 squared is 9

4 squared is 16

5 squared is 25

6 squared is 36

7 squared is 49

8 squared is 64

9 squared is 81

10 squared is 100

The for Loop:

<?php

for ($count = 1; $count <= 10; $count++) {

$square = $count * $count;

echo “$count squared is $square <br>”;

}

Output:

1 squared is 1

2 squared is 4

3 squared is 9

4 squared is 16

5 squared is 25

6 squared is 36

7 squared is 49

8 squared is 64

9 squared is 81

10 squared is 100

Lesson 4

Using Functions:

<?php

function add_tax ($amount) {

$total = $amount * 1.09;

return $total;

}

$price = 16.00;

echo “Price before tax: $price <br>”;

echo “Price after tax: “;

echo add_tax ($price);

Output:

Price before tax: 16

Price after tax: 17.44

Using Library Files:

<?php

function add_tax ($amount) {

$total = $amount * 1.09;

return $total;

}

<?php

include “tax.php”;

$price = 95;

echo “Price before tax: $price <br>”;

echo “Price after tax: “;

echo add_tax ($price);

Output:

Price before tax: 95

Price after tax: 103.55

Lesson 5

Arithmetic Operators:

<?php

echo 6 + 12;

<br>

<?php

echo 24 – 5;

<br>

<?php

echo 4 * 9;

<br>

<?php

echo 48 / 12 ;

<br>

<?php

echo 21 % 6;

Output:

Incrementing and Decrementing:

<?php

for ($count = 1; $count<=10; $count++) {

echo “Count = $count<br>”;

}

Output:

Count = 1

Count = 2

Count = 3

Count = 4

Count = 5

Count = 6

Count = 7

Count = 8

Count = 9

Count = 10

Compound Operators:

<?php

$count = 2;

echo $count += 6;

Output: 8

Numeric Data Types:

<?php

$number = “28″;

if (is_int ($number) ) {

echo “$number is an integer”;

}

else {

echo “$number is not an integer”;

}

Output: 28 is not an integer

Rounding Numbers:

<?php

echo ceil(1.3);

echo “<br>”;

echo floor(6.8);

echo “<br>”;

echo round(1.3);

echo “<br>”;

$score = 0.535;

echo round($score, 2);

echo “<br>”;

$distance = 2834;

echo round($distance, -2);

Output: 4

Comparisons:

<?php

$a = 3;

$b = 7;

echo max($a, $b);

echo “<br>”;

echo min (6, 10, 23, 3, 88, 102, 5, 44);

Output:

Random Numbers:

<?php

echo rand (1, 10);

Output: 4

Lesson 6

Concatenation:

<?php
$phrase = “I want “;
$phrase .= “to teach “;
$phrase .= “the world “;
$phrase .= “to sing”;
echo $phrase
?>

Output: I want to teach the world to sing

Comparing Strings:

<?php
$password = “letmein”;
if ($password == “letmein”)
echo “You have a guessable password”;
echo “<br>”;
$last_name = “Thomas”;
if ($last_name < “N” )
echo “You are in group 1″;
else
echo “You are in group 2″;
?>

Output: You have a guessable password

You are in group 2

Using printf:

<?php
$item = “The Origin of Species”;
$price = 5.99;
printf (“The price of %s is %f”, $item, $price);
?>

Output: The price of The Origin of Species is 5.99

Format Codes:

<?php
$name1 = “Tom”;
$name2 = “Dick”;
$name3 = “Harry”;
echo “<PRE>”;
printf (“%10s \n”, $name1);
printf (“%10s \n”, $name2);
printf (“%10s \n”, $name3);
echo “</PRE>”;
?>

Output: Tom

Dick

Harry

Capitalization:

<?php
$phrase = “I love PHP”;
echo strtoupper ($phrase) . “<br>”;
echo strtolower ($phrase) . “<br>”;
echo ucfirst ($phrase) . “<br>”;
echo ucwords ($phrase) . “<br>”;
?>

Output:

I LOVE PHP

i love php

I love PHP

I Love PHP

Lesson 7

Outputting Contents of an Array:

<?php

$temps = array(38, 40, 49, 60, 70, 79,

84, 83, 76, 65, 54, 42);

print “<PRE>”;

print_r($temps);

print “</PRE>”;

Output:

[0] => 38

[1] => 40

[2] => 49

[3] => 60

[4] => 70

[5] => 79

[6] => 84

[7] => 83

[8] => 76

[9] => 65

[10] => 54

[11] => 42

)

Looping Through an Array:

<?php

$temps = array(38, 40, 49, 60, 70, 79,

84, 83, 76, 65, 54, 42);

while (list($key, $value) = each($temps)) {

echo “Key $key has value $value <br>”;

}

Output:

Key 0 has value 38

Key 1 has value 40

Key 2 has value 49

Key 3 has value 60

Key 4 has value 70

Key 5 has value 79

Key 6 has value 84

Key 7 has value 83

Key 8 has value 76

Key 9 has value 65

Key 10 has value 54

Key 11 has value 42

Associative Array:

<?php

$temps = array(“jan” => 38, “feb” => 40, “mar”=> 49,”apr” => 60, “may” => 70,

“jun” => 79,”jul” => 84, “aug” => 83,

“sep” => 76,”oct” => 65, “nov” => 54,

“dec” => 42);

print “<PRE>”;

print_r($temps);

print “</PRE>”;

Output:

Array

(

[jan] => 38

[feb] => 40

[mar] => 49

[apr] => 60

[may] => 70

[jun] => 79

[jul] => 84

[aug] => 83

[sep] => 76

[oct] => 65

[nov] => 54

[dec] => 42

)

Sorting an Array:

<?php

$temps = array(“jan” => 38, “feb” => 40, “mar” => 49, “apr” => 60, “may” => 70, “jun” => 79,”jul” => 84, “aug” => 83, “sep” => 76,”oct” => 65, “nov” => 54, “dec” => 42);

asort($temps);

foreach($temps as $month => $temp) {

print “$month: $temp <br>\n”;

}

Output:

jan: 38

feb: 40

dec: 42

mar: 49

nov: 54

apr: 60

oct: 65

may :70

sep: 76

jun: 79

aug: 83

jul: 84

Accessing Data From a Multi-Dimensional Array:

<?php

$temps = array (

1995 => array (“jan” => 36, “feb” => 42, “mar” => 51),

1996 => array (“jan” => 37, “feb” => 42, “mar” => 49),

1997 => array (“jan” => 34, “feb” => 40, “mar” => 50) );

echo $temps[1995]["feb"];

Output: 42

Lesson 8

Using ereg:

<?php

$phrase = “I love PHP”;

if (ereg(“PHP”, $phrase)) {

echo “The expression matches”;

}

Output: The expression matches

Common Character Classes:

<?php

$phrase = “I love PHP”;

if (ereg(“[[:alnum:]]”, $phrase)) {

echo “The expression matches”;

}

Output: The expression matches

Testing for Position:

<?php

$phrase = “I love PHP”;

if (ereg(“^[a-z]“, $phrase)) {

echo “The expression matches”;

}

Output: The expression matches

Wildcard Matching:

<?php

$word = “book”;

if (ereg(“^.oo.$”, $word)) {

echo “The expression matches”;

}

Output: The expression matches

Breaking a String into Components:

<?php

$email = “chris@lightwood.net”;

if (ereg(“^([^@]+)@([a-z\-]+\.)+([a-z]{2,4})$”,

$email, $match)) {

echo “Mailbox: ” . $match[1] . “<br>”;

echo “Domain name: ” . $match[2] . “<br>”;

echo “Domain type: ” . $match[3] . “<br>”;

}

else {

echo “Email address is invalid”;

}

Output:

Mailbox: chris

Domain name: lightwood

Domain type: net

Lesson 8

Searching and Replacing:

?php

$string = “(555)123-4567″;

echo ereg_replace(

“$[[:digit:]]{3}$[[:digit:]]{3}-[[:digit:]]{4}$”,

“(XXX)XXX-XXXX”, $string);

Output: (XXX)XXX-XXXX

Lesson 9

Formatting Dates:

<?php

echo date(“j F Y H:I:s”, 1000000000);

Output: 8 September 2001 21:1:40

Creating Timestamps:

<?php

$time = mktime(12 + 37, 0, 0, 12, 30, 2001);

echo date(“d/m/Y H:i:s”, $time);

Output: 01/01/2002 01:00:00

Getting Information About A Timestamp:

<?php

$now = getdate();

switch ($now[wday]) {

case 0: // Sunday

case 6: // Saturday

echo “It’s the weekend”;

break;

default: echo “It’s a weekday”;

}

Output: It’s a weekday

Lesson 10

Creating and Using Objects:

<?php

class myClass {

var $myValue = “Jelly”;

function myMethod() {

echo “myValue is ” . $this->myValue . “<br>”;

}

$myObject = new myClass;

$myObject->myMethod();

$myObject->myValue = “Custard”;

$myObject->myMethod();

Output:

myValue is Jelly

myValue is Custard

Using Third Party Classes:

<?php

include “email_validation.php”;

$validator = new email_validation_class;

$validator->localuser = “name”;

$validator->localhost = “domain.com”;

$validator->timeout = 10;

$validator->debug = TRUE;

$email = “chris@datasnake.co.uk”;

if ($validator->ValidateEmailBox($email)) {

echo “$email is a valid email address”;

}

else {

echo “$email could not be validated”;

}

Output:

Resolving host name “spam.datasnake.co.uk”….

Connecting to host address “194.1.147.25”…Failed.

chris@datasnake.co.uk is a valid email address

Lesson 11

Processing HTML Forms:

<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>

<head>

<title>Untitled Document</title>

</head>

<body>

<TABLE>

<TR>

</TR>

<TR>

<TD>Your email:</TD>

</TR>

<TR>

<TD>Your gender:</TD>

<TD><INPUT TYPE=”RADIO” NAME=”gender” VALUE=”m”> Male

<INPUT TYPE=”RADIO” NAME=”gender” VALUE=”f”> Female </TD>

</TR>

<TR>

<TD>How you found us</TD>

<TD>

<OPTION VALUE=”search”>Internet Search Engine</OPTION>

<OPTION VALUE=”tv”>TV Advertisement</OPTION>

<OPTION VALUE=”billboard”>Billboard</OPTION>

<OPTION SELECTED VALUE=”other”>Other</OPTION>

</SELECT>

</TD>

</TR>

<TR>

<TD>May we email you?</TD>

<TD><INPUT TYPE=”CHECKBOX” NAME=”may_contact”

VALUE=”Y” CHECKED></TD>

</TR>

<TR>

<TD>Comments</TD>

<TD><TEXTAREA ROWS=4 COLS=50

NAME=”comments”>Enter your comments here

</TEXTAREA></TD>

</TR>

</TABLE>

</FORM>

</body>

</html>

<?php

$body = “These comments were sent via the website\n\n”;

foreach($_POST as $field => $value) {

$body .= sprintf(“%s = %s\n”, $field, $value);

}

mail(“owner@website.com”, “Comments sent via website”, $body,

‘From: “WebComments” <comments@website.com>’);

<H1>Thank You</H1>

Your comments have been sent!

Output: Thank You

Your comments have been sent!

Output: The following comments were submitted via the website

name = Chris Newman

email = chris@lightwood.net

gender = m

referrer = search

may_contact = Y

comments = This is my favorite website ever

Lesson 12

Defaulting the Value of a Text Input Field:

<?php

if(isset($_POST["quantity"]))

$quantity = settype($_POST["quantity"], “integer”);

else

$quantity = 1;

Output: 1 x item = $5.99

Update quantity : 1 Change quantity

Selecting a Default Radio Button Group Item:

<?php

if (!isset($shipping))

$shipping = “economy”;

echo “Your order will be sent via $shipping shipping”;

<INPUT TYPE=”RADIO” NAME=”shipping” VALUE=”economy”

<?php if ($shipping == “economy”) echo “CHECKED”;?>> Economy

<INPUT TYPE=”RADIO” NAME=”shipping” VALUE=”standard”

<?php if ($shipping == “standard”) echo “CHECKED”;?>> Standard

<INPUT TYPE=”RADIO” NAME=”shipping” VALUE=”express”

<?php if ($shipping == “express”) echo “CHECKED”;?>> Express

</FORM>

Output: Your order will be sent via economy shipping

Economy Standard Express Change shipping option

Selecting a Default Item from a Menu:

?php

if (!isset($shipping))

$shipping = “economy”;

echo “Your order will be sent via $shipping shipping”;

VALUE=”economy”>Economy</OPTION>

VALUE=”standard”>Standard</OPTION>

VALUE=”express”>Express</OPTION>

</FORM>

Output: Your order will be sent via economy shipping

Economy Change shipping option

Creating a Multiple-Option Selection Using Check Boxes:

<?php

function generate_checkboxes($name,

$options, $default=array()) {

if (!is_array($default))

$default = array();

foreach($options as $value => $label) {

$html .= “<INPUT TYPE=CHECKBOX “;

if (in_array($value, $default))

$html .= “CHECKED “;

$html .= “NAME=\”{$name}[]\” VALUE=\”$value\”>”;

$html .= $label . “<br>”;

}

return($html);

}

$options = array(“movies” => “Going to the movies”,

“music” => “Listening to music”,

“sport” => “Playing or watching sports”,

“travel” => “Traveling”);

$html = generate_checkboxes(“interests”,

$options, $interests);

<H1>Please select your interests</H1>

<?php print $html;?>

kathleen shane sandigan

Friday 24 February 2012

Lesson 1-15

Lesson 1

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