6/28/2014 PHP Tutorials: Changing Case

http://www.homeandlearn.co.uk/php/php7p1.html 1/2

COMPUTER COURSES

Home

Beginners Computing

Word 2007 to 2013

Word 2000 to 2003

Excel 2007 to 2013

Excel to 2003

Excel VBA Programming forBeginners

Web Design

Javascript

Visual Basic .NET

Beginners PHP

C# .NET

Java for Beginners

BUY OUR BOOKS

VB Net eBook - £5.49

C# Net eBook - £5.49

5 Programming Books: £10

Changing Case in PHP

The ability take strings of text and manipulate them is one of the essential abilities you need as aprogrammer. If a user enters details on your forms, then you need to check and validate this data. Forthe most part, this will involve doing things to text. Examples are: converting letters to uppercase orlowercase, checking an email address to see if all the parts are there, checking which browser theuser has, trimming white space from around text entered in a text box. All of these come under theheading of string manipulation. To make a start, we'll look at changing the case of character.

Changing the Case of a Character

Suppose a you have a textbox on a form that asks users to enter a first name and surname. Thechances are high that someone will enter this:

bill gates

Instead of this:

Bill Gates

So your job as a programmer is to convert the first letter of each name from lower to uppercase. Thisis quite easy, with PHP.

There's a script amongst the files you downloaded called changeCase.php. Open up this page to

see the code.

It's just a textbox and a button. The textbox will already have "bill gates" entered, when you load it up.What we want to do is to change it to "Bill Gates" when the button is clicked. Here's the script thatdoes that.

<?PHP

$full_name = 'bill gates';

if (isset($_POST['Submit1'])) {

$full_name = $_POST['username'];

$full_name = ucwords( $full_name );

}

?>

The first line just makes sure that the lowercase version is placed into the textbox when the pageloads:

$full_name = 'bill gates';

This is the line that we want to convert and turn in to "Bill Gates". The only line in the code that you

Free PHP Tutorials

Ethical Hacking Traininginnobuzz.in

Ethical Hacking & Info Security Training Program, Net Security

6/28/2014 PHP Tutorials: Changing Case

http://www.homeandlearn.co.uk/php/php7p1.html 2/2

haven't yet met is this one:

$full_name = ucwords( $full_name );

And that's all you need to convert the first letter of every word to uppercase! The inbuilt function is this:

ucwords( )

In between the round brackets, you type the variable or text you want to convert. PHP will take care ofthe rest. When the conversion is complete, we're storing it back into the variable called $full_name.

If you just want to convert the first letter of a string (for a sentence, for example), then you can useucfirst( ) . Like this:

$full_ sentence = ucfirst( $full_ sentence );

To convert all the letters to either upper or lowercase, use these:

strtoupper( )

strtolower( )

Here's an example of how to use them:

$change_to_lowercase = "CHANGE THIS";

$change_to_lowercase = strtolower($change_to_lowercase);

$change_to_uppercase = "change this";

$change_to_uppercase = strtoupper($change_to_lowercase);

Again, the variable or text you want to change goes between the round brackets of the function. This isthen assigned to a variable.

In the next part, we'll take a look at how to trim unwanted white space from your strings

Move on to the Next Part -->

Back to the PHP Contents Page

© All course material copyright Home and Learn