PHP Basic - Exercises, Practice, Solution

Last update on May 30 2023 12:54:45 (UTC/GMT +8 hours)

PHP basic [16 exercises with solution]

[An editor is available at the bottom of the page to write and execute the scripts. Go to the editor]

1. Write a PHP script to get the PHP version and configuration information.

Click me to see the solution of Exercise No.- 1. Click me again to collapse.

<?php
phpinfo();
?>

2. Write a PHP script to display the following strings.
Sample String :
'Tomorrow I \'ll learn PHP global variables.'
'This is a bad command : del c:\\*.*'
Expected Output :
Tomorrow I 'll learn PHP global variables.
This is a bad command : del c:\*.*

Click me to see the solution of Exercise No.- 2. Click me again to collapse.

<?php
echo 'Tomorrow I \'ll learn PHP global variables.'; 
echo 'This is a bad command : del c:\\*.*'; 
?>

3. $var = 'PHP Tutorial'. Put this variable into the title section, h3 tag and as an anchor text within a HTML document.
Sample Output :

PHP Tutorial

PHP, an acronym for Hypertext Preprocessor, is a widely-used open source general-purpose scripting language. It is a cross-platform, HTML embedded server-side scripting language and is especially suited for web development.

Click me to see the solution of Exercise No.- 3. Click me again to collapse.

<?php
$var = 'PHP Tutorial';
?>
<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8">
  <title><?php echo $var; ?> - W3resource!</title>
  </head>
  <body>
  <h3><?php echo $var; ?></h3>
  <p>PHP, an acronym for Hypertext Preprocessor, is a widely-used open source general-purpose scripting language. It is a cross-platform, HTML embedded server-side scripting language and is especially suited for web development.</p>
  <p><a href="https://www.w3resource.com/php/php-home.php">Go to the <?php echo $var; ?></a>.</p>
</body>
</html>

4. Create a simple HTML form and accept the user name and display the name through PHP echo statement.

Sample output of the HTML form :

sample html form

Click me to see the solution of Exercise No.- 4. Click me again to collapse.

<!DOCTYPE html>
<html>
<head>
   <title></title>
   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   </head>
   <body>
   <form method='POST'>
   <h2>Please input your name:</h2>
 <input type="text" name="name">
 <input type="submit" value="Submit Name">
 </form>
<?php
//Retrieve name from query string and store to a local variable
$name = $_POST['name'];
echo "<h3> Hello $name </h3>";
?>
</body>
</html>

5. Write a PHP script to get the client IP address.

Click me to see the solution of Exercise No.- 5. Click me again to collapse.

<?php
//whether ip is from share internet
if (!empty($_SERVER['HTTP_CLIENT_IP']))   
  {
    $ip_address = $_SERVER['HTTP_CLIENT_IP'];
  }
//whether ip is from proxy
elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))  
  {
    $ip_address = $_SERVER['HTTP_X_FORWARDED_FOR'];
  }
//whether ip is from remote address
else
  {
    $ip_address = $_SERVER['REMOTE_ADDR'];
  }
echo $ip_address;
?>

6. Write a simple PHP browser detection script.
Sample Output : Your User Agent is :Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.114 Safari/537.36

Click me to see the solution of Exercise No.- 6. Click me again to collapse.

<?php
echo "Your User Agent is :" . $_SERVER ['HTTP_USER_AGENT'];
?>

7. Write a PHP script to get the current file name.

Click me to see the solution of Exercise No.- 7. Click me again to collapse.

<?php
$current_file_name = basename($_SERVER['PHP_SELF']);
echo $current_file_name;
?>

8. Write a PHP script, which will return the following components of the url 'https://www.w3resource.com/php-exercises/php-basic-exercises.php'.
List of components : Scheme, Host, Path
Expected Output :
Scheme : http
Host : www.w3resource.com
Path : /php-exercises/php-basic-exercises.php

Click me to see the solution of Exercise No.- 8. Click me again to collapse.

<?php
$url = 'https://www.w3resource.com/php-exercises/php-basic-exercises.php';
$url=parse_url($url);
echo 'Scheme : '.$url['scheme'].'<br />';
echo 'Host : '.$url['host'].'<br />';
echo 'Path : '.$url['path'].'<br />';
?>

9. Write a PHP script, which change the color of first character of a word.
Sample string : PHP Tutorial
Expected Output :
PHP Tutorial

Click me to see the solution of Exercise No.- 9. Click me again to collapse.

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

10. Write a PHP script, to check whether the page is called from 'https' or 'http'.

Click me to see the solution of Exercise No.- 10. Click me again to collapse.

<?php
if (!empty($_SERVER['HTTPS'])) 
{
  echo 'https is enabled';
}
else
{
echo 'http is enabled';
}
?>

11. Write a PHP script to redirect a user to a different page .
Expected output : Redirect the user to https://www.w3resource.com/

Click me to see the solution of Exercise No.- 11. Click me again to collapse.

<?php
header('Location: https://www.w3resource.com/');
?>

12. Write a simple PHP program to check that emails are valid.
Hints : Use FILTER_VALIDATE_EMAIL filter that validates value as an e-mail address.
Note : The PHP documentation does not saying that FILTER_VALIDATE_EMAIL should pass the RFC5321.

Click me to see the solution of Exercise No.- 12. Click me again to collapse.

<?php
// pass valid/invalid emails
$email = "[email protected]";
if (filter_var($email, FILTER_VALIDATE_EMAIL)) 
{
     echo '"' . $email . '" = Valid';
}
else 
{
     echo '"' . $email . '" = Invalid';
}
?>

13. Write a e PHP script to display string, values within a table.
Note : Use HTML table elements into echo.
Expected Output :
php table

Click me to see the solution of Exercise No.- 13. Click me again to collapse.

<?php
$a=1000;
$b=1200;
$c=1400;
echo "<table border=1 cellspacing=0 cellpading=0>
<tr> <td><font color=blue>Salary of Mr. A is</td> <td>$a$</font></td></tr> 
<tr> <td><font color=blue>Salary of Mr. B is</td> <td>$b$</font></td></tr>
<tr> <td><font color=blue>Salary of Mr. C is</td> <td>$c$</font></td></tr>
</table>";
?>

14. Write a e PHP script to display source code of a webpage (e.g. "http://www.example.com/").

Click me to see the solution of Exercise No.- 14. Click me again to collapse.

<?php
$all_lines = file('http://www.example.com/');
foreach ($all_lines as $line_num => $line)
 {
 	echo "Line No.-{$line_num}: " . htmlspecialchars($line) . "<br />\n";
 }
?>

15. Write a PHP script to get last modified information of a file.
Sample filename : php-basic-exercises.php
Sample Output : Last modified Monday, 09th June, 2014, 06:45am

Click me to see the solution of Exercise No.- 15. Click me again to collapse.

<?php
$file_last_modified = filemtime("php-basic-exercises.php"); 
echo "Last modified " . date("l, dS F, Y, h:ia", $file_last_modified);
?>

16. Write a PHP script to count lines in a file.
Note : Store a text file name into a variable and count the number of lines of text it has.

Click me to see the solution of Exercise No.- 16. Click me again to collapse.

<?php
$file = "abc.php"; 
$no_of_lines = count(file($file)); 
echo "There are $no_of_lines lines in $file"; 
?>

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