How to change the color of the first character of a word using PHP script?

The preg_replace() function is an in-built function that returns a word or array of words with the replacement of some content after searching the pattern. If the search pattern is not found then it will be returned unchanged. 

Approach:

• Declare a variable with a string value.
• Use preg_replace() function to replace the first character of every word.
• Display the replaced value of the string variable. 

Example 1:

PHP

<?php

// Text to replace
$text = "Geeks For Geeks";

// The preg_replace is used here to replace the
// color of first character of the word
$text = preg_replace('/(\b[a-z])/i',
'<span style="color:green;">\1</span>', $text);

// Display the text value
echo $text
?>

Output:

Example 2:

PHP

<?php

// Text to replace
$text = "Practice code in GEEKSFORGEEKS";

// The preg_replace is used here to replace the
// color of first character of the word
$text = preg_replace('/(\b[a-z])/i',
'<span style="color:green;">\1</span>', $text);

// Display the text value
echo $text
?>

Output: