Conditional Statementfinal PHP 02

PHP Course
2: Conditional Statements
PHP Course

Info@ITBigDig.com

Instructor
 Name: Mohamed Saad.
 Email: Engsaad_aly@hotmail.com
 Occupation: Web Developer In IT Big Dig.
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Contents
• PHP Array
o Introduction.

• Conditional Statements.
o if statement.
o if...else statement.
o if...else if....else statement.
o switch statement.

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PHP Array
• There are three types of arrays:
Indexed arrays

•Arrays with numeric index

Associative arrays

• Arrays with named keys

Multidimensional
arrays

•Arrays containing one or more arrays

Array Function
Syntax

indexed
associative

•array(‘value’, );
•array(‘key’ =>’value’, );

<pre>
<?php
$x = array ('saad','nacer city','zkzk@hotmail');
print_r ($x);

Copy Code
outputdata.php

$y = array ('name' => 'saad', 'address' => 'nacer city', 'email' =>
array ('zkzk@hotmail', 'zkzk@yahoo', 'zkzk@gmail'));
print_r ($y);
?>
</pre>

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Conditional Statements
1) if statement - executes some code only if a specified

condition is true.
2) if...else statement - executes some code if a condition is
true and another code if the condition is false.

3) if...else if....else statement - selects one of several blocks
of code to be executed.
4) switch statement - selects one or more of many blocks

of code to be executed.

if statement
Syntax
o if (condition)
{
code to be executed if condition is true;
}

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HTML

PHP

Dig: Check value entered by user.

<html>
<body>

Copy Code
game.php

<form action="game.php" method="post">
Enter number between 1 and 100:<input type="text" name="x"/>
<input type="submit" name="submit" value="xxx"/>
</form>
</body>
</html>
<?php
if (empty($_POST)===false)
{
$x=$_POST['x'];
if($x>50)
{
echo 'U Entered Number ',$x,' greater than 50','<br>';
echo 'U Entered Number '.$x.' greater than 50';
exit();
}
}
?>

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Getdate Function
Syntax
<?php

timestamp

print_r(getdate( ));

?>
o getdate(timestamp);
• Timestamp
o Default (time())
o “U” Specifies an integer Unix timestamp

Key
"seconds"
"minutes"
"hours"
"mday"
"wday"
"mon"

Returned Values
0 to 59
0 to 59
0 to 23
1 to 31
0 (for Sunday)
1 through 12

"year"

Examples: 1970 or 2011

"yday"

0 through 365

"weekday"

Sunday through Saturday

"month"

January through December

0

Unix Epoch: is a system for describing points in time
-2147483648 through 2147483647.

<pre>
Copy Code
<?php
Conditional_statement.php
print_r(getdate());
echo '<br/>';
$mydate=getdate(date(time()));
echo"--------------------------------------------";
echo"<br/>";
echo "date: $mydate[weekday], $mydate[month] $mydate[mday],
$mydate[year]";
echo"<br/>";
echo "time: H:$mydate[hours], M:$mydate[minutes],
S:$mydate[seconds]";
echo"<br/>";
if ($mydate[“mday”]>=20)
{
echo"--------------------------------------------";
echo"<br/>";
echo "we are at the end of the month";
}
?>
</pre>

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localtime Function
Syntax
<?php
print_r(localtime());

?>

Is Associative
• If set to FALSE or not supplied then the array is
returned as a regular, numerically indexed array. If
the argument is set to TRUE then localtime() returns
an associative array containing all the different
elements of the structure returned by the C function

call to localtime.

if...else Statement
Syntax
if (condition)
{
}
else
{
code to be executed if condition is false;
}

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<?php

Copy PHP Code

{
$x=$_POST['x'];
if ($x>50){
exit();
}
else
{
echo 'U Entered Number ',$x,' less than 50','<br>';
exit();
}
}

?>

if...else if....else Statement
Syntax
if (condition) {
} else if (condition) {
} elss {
}

<html>
Copy Code
<body>
game.php
<form action="game.php" method="post">
Enter number between 1 and 100:<input type="text" name="x"/>
<input type="submit" name="submit" value="Go"/>
</form>
</body>
</html>
<?php
{
$x=$_POST['x'];
if($x>50){
exit();
}else if($x<50){
echo 'U Entered Number ',$x,' less than 50','<br>';
exit();
}else
{
echo 'U Entered Number ',$x;
exit();
}
}
?>

I think it`s clear now…!

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Date Function

Syntax
<?php

echo date("H:i:s");
?>

H

24-hour format

00 through 23

Switch statement
Syntax
o switch (n)
{
case label1:
code to be executed if n=label1;
break;
case label2:
code to be executed if n=label2;
break;
default:
code to be executed if n is different from both
label1 and label2;
}

Switch statement
Power Syntax
o switch (variable)
{
case (condition):
break;
case (condition):
break;
default:
All conditions are false;
}

<?php
$x="red";
switch ($x)
{
case "blue":
echo "Your favorite color is blue!";
break;
case "red":
echo "___________________<br>";
echo "Your favorite color is red!";
break;
case "green":
echo "Your favorite color is green!";
break;
default:
echo "no matching color!";
}

Copy Code
switch2.php

?>
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H

24-hour format

00 through 23

<?php

Copy Code
switch.php

$hours = date("H");
$hours=$hours-2;
echo $hours,date(":i:s");
echo "<br/>";
?>
<?php
switch ($hours)
{
case ($hours>5 and $hours<6):
echo "it is the time of the TV News <br/>";
case ($hours>=6 and $hours<8):
echo "Read something<br/>";
case ($hours>=8 and $hours<10):
echo "PlayStation time<br/>";
default:
echo "GoodNight";
}
?>

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Character

Description

Expected O/P

d

Day of the month,

j

Day of the month without leading
zeros

D
l

A textual representation
of a day

2 digits

Returned Values
01 to 31
1 to 31

Three letters Mon through Sun

A full textual representation of the day Sunday through
of the week it is lowercase “L”
Saturday

N

ISO-8601 numeric
representation of the day
of the week (PHP 5.1.0)

S

English ordinal suffix for
the day of the month,

z

The day of the year

1 digit

1 (for Monday)
through 7 (for
Sunday)

2 characters st, nd, rd or th.
0 through 365

For complete reference Go To
http://php.net/manual/en/function.date.
php
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End
Conditional Statements
We hope You enjoy This Tutorial.
For any Suggestions Please Email Us
Info@ITBigDig.com

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Conditional Statementfinal PHP 02

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