ucwords() makes the first letter of every word in a string uppercase.

 
<?php
$full_name = "this is a test";
$full_name = ucwords ( $full_name );
print $full_name; 
?>

1.	Controlling Case
2.	ucwords() function capitalizes the first letter of each word in a string.
3.	ucwords.php
4.	string ucwords ( string str ) converts the first letter of each word in the string to an uppercase character, leaving the others untouched.
5.	submitted string lowercase with strtolower() before invoking ucwords():
6.	Prettifying names with ucwords()

ucwords() makes the first letter of every word in a string uppercase. : ucwords « String « PHP