Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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PHP

Create a Web form to help in creating “Jumble” puzzles.

Create a form that has four input fields named Word1, Word2, Word3, and Word4, as well as “Reset” and “Submit” buttons. Create a form processing script that verifies that all four words are entered, that all of them contain only letters, and that all four are between 4 and 7 characters long. Once all of the words have been verified as correct, use the strtoupper() and str_shuffle() functions to produce four jumbled sets of letters.

To create the Jumble Maker form:

1. Create a new document in your text editor. Type the <!DOCTYPE html> declaration, <html> element, header information, and <body> element. The page title should be "Jumble Maker”, add to <title> </title> element.

2. Add the following HTML form tags in the body of the document:

<form action= "process_JumbleMaker.php" method="post">

Word 1: <input type="text" name="Word1" /><br />

Word 2: <input type="text" name="Word2" /><br />

Word 3: <input type="text" name="Word3" /><br />

Word 4: <input type="text" name="Word4" /><br />

<input type="reset" value="Clear Form" />&nbsp; &nbsp;

<input type="submit" name="Submit" value="Send Form" />

</form>

3. Save the document as JumbleMaker.html

4. Create a new document in your text editor. Type the <!DOCTYPE html> declaration, <html> element, header information, and <body> element. The title of the page should be “Jumble Maker”, add to the <title> ... </title> element.

5. Add the opening and closing tags for the PHP script section in the body of the document: <?php ?>

6. Create a function called displayError(). This function displays the error message, and takes two parameters: $fieldName, which is the name of the field as it appears on the Web form; and $errorMsg, which describes the error for the user. There is no return value for this function. 

7. Create a second function called validateWord() below the displayError() function. This function takes two parameters. The first parameter, $data, is a string to be validated. The second parameter, $fieldName, is the name of the form field. The function returns the $data parameter after it has been cleaned up. After validating the user input, use the built-in PHP function strtoupper() (Links to an external site.) and str_shuffle (Links to an external site.)() to change all letters to uppercase and shuffle the letters. 

 

8. Immediately after the validateWord() function, declare and initialize a new variable called $errorCount and a new array called $words[] as follows:

$errorCount = 0;

$words = array();

9. Add assignment statements for the $words array variable to receive the output of the validateWord() function for each form field:

$words[] = validateWord($_POST['Word1'], "Word 1");

$words[] = validateWord($_POST['Word2'], "Word 2");

$words[] = validateWord($_POST['Word3'], "Word 3");

$words[] = validateWord($_POST['Word4'], "Word 4");

10. Add a conditional statement immediately after the values of $words have been assigned. This statement will display the total number of errors found or the shuffled words if there were no errors.

if ($errorCount>0)

echo "Please use the \"Back\" button to re-enter the data.<br />\n";

else {

$wordnum = 0;

foreach ($words as $word)

echo "Word ".++$wordnum.": $word<br />\n";

}

11. Save the document as process_JumbleMaker.php.

12. Test the form. It should only show the jumbled results if all four words were entered correctly.

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