PHP Exercises: Changes the color of first character of a word

PHP: Exercise-9 with Solution

Write a PHP script, which changes the color of the first character of a word.

Sample string : PHP Tutorial

Sample Solution: -

PHP Code:

$text = 'PHP Tutorial';
$text = preg_replace('/(\b[a-z])/i','<span style="color:red;">\1</span>',$text);
echo $text;

Sample Output:

PHP Tutorial

View the output in the browser

preg_replace() function:


mixed preg_replace ( mixed $pattern , mixed $replacement , mixed $subject [, int $limit = -1 [, int &$count ]] )

Searches subject for matches to pattern and replaces them with replacement. The function returns an array if the subject parameter is an array, or a string otherwise. If matches are found, the new subject will be returned, otherwise subject will be returned unchanged or NULL if an error occurred.


Flowchart: Changes the color of first character of a word

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Previous: Write a PHP script, which will return the following components of the url 'https://www.w3resource.com/php-exercises/php-basic-exercises.php'.
Next: Write a PHP script, to check whether the page is called from 'https' or 'http'.

What is the difficulty level of this exercise?

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PHP: Tips of the Day

Why shouldn't I use mysql_* functions in PHP?

The MySQL extension:

  • Is not under active development
  • Is officially deprecated as of PHP 5.5 (released June 2013).
  • Has been removed entirely as of PHP 7.0 (released December 2015)
  • This means that as of 31 Dec 2018 it does not exist in any supported version of PHP. If you are using a version of PHP which supports it, you are using a version which doesn't get security problems fixed.
  • Lacks an OO interface
  • Doesn't support:
    • Non-blocking, asynchronous queries
    • Prepared statements or parameterized queries
    • Stored procedures
    • Multiple Statements
    • Transactions
    • The "new" password authentication method (on by default in MySQL 5.6; required in 5.7)
    • Any of the new functionality in MySQL 5.1 or later

Since it is deprecated, using it makes your code less future proof.

Lack of support for prepared statements is particularly important as they provide a clearer, less error-prone method of escaping and quoting external data than manually escaping it with a separate function call.

Ref : https://bit.ly/2BIIsF0