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How to convert a string to uppercase in PHP?

In this PHP example, we are going to learn, how we can convert a string to uppercase? To convert string to uppercase, we use strtoupper() method which returns uppercase converted string.
Submitted by IncludeHelp, on October 17, 2017

PHP - strtoupper()

This method takes a string in any case as an argument and returns uppercase string.

Example

<?php
	$str = 'hello friends';
	echo strtoupper($str) 
?>

Output

HELLO FRIENDS

Other functions:

PHP - ucfirst ()

This function converts first letter in uppercase of the string.

Example

<?php
echo ucfirst("hello friend");
//output: Hello friends
?>

PHP - ucwords ()

This function converts each first character of all words in uppercase.

Example

<?php
echo ucwords("how are you");
//Output: How Are You?
?>

Complete code (HTML with PHP)

<html>
	<head>
		<title> PHP code to get textbox value and print it in Uppercase </title>
	</head>
	<body>
		<form action="">
			<input type="text" id="str" type="text" name="str" maxlength="10" size="26">

			<input type="submit" name="submit" formmethod="POST">
		</form>

		<?php
			if(isset($_POST['submit']))
			{
				$str = strtoupper($_POST['str']);
				echo "convert to upper case";
				echo $str;	
			}
		 ?>
	</body>
</html>

Output

PHP example to convert into uppercase




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