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Can someone guide me step by step on how to do the pursue of chapter 7. I am having a hard time understanding it:

 

A. Rewrite soups2.php so that it displays the number of elements in the array without using a separate variable. Hint:

You’ll need to concatenatethe count() function call into the print statement.

 

For this one do I did :

 

	//Count and print the current number of elements:
print "<p>The soups array originally had " . count($soups) . " events </p>";

//Add three items to the array:
$soups['Thursday'] = 'Chicken Noodle';
$soups['Friday'] = 'Tomato';
$soups['Saturday'] = 'Cream of Broccoli';

//Count and print the number of elements again:
print "<p>After adding 3 more soups, the array now has " . count($soups) . " elements.</p>";

 

Is that right?

 

B.Create another script that creates and displays a multidimensional array (or some of it, anyway). < Don't know what to do.

 

C.Rewrite list.php so that it uses foreach instead of implode(), but still prints each sorted word on its own line in the browser. Also add some form validation so that it only attempts to parse and sort the string if it has a value.

 

This is where i am stuck for C:

 

// Turn the array back into a string:
if (isset($_POST['word']) and is_array('word')){
foreach ()
}

 

Some help and better understand would be greatly appreciated.

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A. Yes, that's exactly correct. Kudos!

 

B. Just come up with another example in which you have a complex data set. For example, take your favorite albums and use those, with the songs on them.

 

C. You'll need to start by exploding $_POST['word'] to turn it into an array. Then you loop through that array using foreach. Within the foreach, you can print each word with a

after it.

 

Let me know if you have more questions.

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Thank you for the reply larry and thank you for explaining to me how to tackle the questions. I didn't want to start chapter 8 until I solved the purse for 7 but now since I am on ch 8 i will do both at the same time and write you the feedback.

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this is what i came up with:

 

pursue #3: "Create another script that creates and displays a multidimensional array (or some of it, anyway)."

 

// create a multidimensional array:
$pasta = array(1 => 'mozarella', 'tomato sauce', 'salmon', 'salt', 'pepper');
$rice = array(1=> 'black rice', 'white rice', 'some vegetables', 'olive oil');
$food = array(
   'pasta' => $pasta,
   'rice' => $rice,
   'other' => 'salad',
);

// display the multidimensional array:
foreach ($food as $key => $value) {
   print "<p>For making $key we need the following ingredients:<br />\n";
   foreach ($value as $key => $value) {
    print "<p>Ingredient $key is $value <br />\n";
   }
}
// we get a small error here - i'm not sure why, but it's probably because foreach() can only be used with multidimensional arrays, and the last $key => $value pair in the $food array isn't another array, which would make that particular line non-multidimensional

 

 

pursue #4: "Rewrite list.php so that it uses foreach instead of implode(), but still prints each sorted word on its own line in the rowser. Also add some form validation so that it only attempts to parse and sort the string if it has a value."

 

i made it work with this code:

 

   $okay = true;
   $wordsArray = $_POST['words'];

// turn the incoming string, $_POST['words'], into an array and validate:

   if (empty($wordsArray)) {                                                                    // the validation
    print "<p>Please enter at least two words in the box.</p>";
    $okay= FALSE;															   
   }
	    else {
		    $wordsArray = explode (' ', $_POST['words']);			
	    }


// sort the words alphabetically:

   if ($okay) {
       sort ($wordsArray);
   }


// use foreach instead of implode & print:

   if ($okay) {
    print "<p>An alphabetized version of your list is: ";
    foreach ($wordsArray as $key => $value) {
	    print "<br />\n $value ";
    }
   }
    print "</p>";

 

 

i did have some problems with pursue #4, however, because the validation doesn't seem to work using isset() - it completely ignores the condition and goes straight to printing "An alphabetized version of your list is: ", even if no words are written in the box:

 

   if (isset($wordsArray)) {								 
    $wordsArray = explode (' ', $_POST['words']);
   }
   else {
    print "<p>Please enter at least two words in the box.</p>";
    $okay = FALSE;
   }

 

what am i missing?!

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oh yeah, i get it now! thanks a lot, margaux!

 

isset() in the following case returns TRUE even if the form field is blank, because the variable exists, so the print statement will never be executed:

 

if (isset($wordsArray)) {														   
	    $wordsArray = explode (' ', $_POST['words']);
}
   else {
	    print "<p>Please enter at least two words in the box.</p>";
	    $okay = FALSE;
   }

 

this is probably the better way to do it (i don't know if it's the best):

 

   if (isset($wordsArray)) {
    if ( empty($wordsArray) ) {
	    print "<p>Please enter at least two words in the box.</p>";
	    $okay = FALSE;
    }
    else {
	    $wordsArray = explode (' ', $_POST['words']);
    }
   }

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here is part b for pursu chapter 7 for MD array

 

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Chapter 7 pursu</title>
</head>
<body>
<h2> Console Wars</h2>
<?php
/* pursu chapter 7 B
* creating a multidimensional array
*/
//creating a MD array:
$company = array(
1 => 'Microsoft','Nintendo', 'Sony');
$console = array(
1 => 'Xbox 360','Wii U','Playstation 3');
$firstparty = array(
1 => 'Halo', 'Mario', 'God Of War');
$best = array(
'Maker' => $company,
'System' => $console,
'mascot' => $firstparty );
print "<p>The last-gen console race begin with {$best['Maker'][1]} Xbox 360";
print "<p>The first next-gen console will be Nintento's {$best['System'][2]}";
print "<p>The most brutal first party title is Sony's {$best['mascot'][3]}";
foreach ($best as $name => $consolz){

 foreach ($consolz as $game => $consoles){
  print "<p>The gaming system by company, console and flagship title: $consoles\n</p>";
 }
}
?>
</body>
</html>

 

And for C the issue I have been having with PHP is that I can read the code but up until now I struggle with

constructing my own code. Can you explain that part to me and how to construct that problem?

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I'm sorry, it's not clear to me what you mean by "C", and therefore how I would suggest you construct the problem. Could you provide part of the prompt so that it's crystal clear?

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What i meant was the 3rd and 4th pursue chapter 7 and for chapter 8 "Rewrite the password conditionals found in register.php as a nested pair of conditionals. Hint: See Chapter 6 for examples."

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Okay, sorry to be daft, but it's still not clear. So by "B" above, you mean pursue #3 for Ch 7 (Create another script...), which you've done. Did you have questions about that or no?

 

By "C" above, you mean pursue #4 for Ch 7 (Rewrite list.php so that it...). Is that the one you want some advice on?

 

And when you mention the pursue prompt from Ch 8, #3 (Rewrite the password...), what is your question there?

 

Again, apologies for not being more helpful, but right now I can't even tell what, exactly, you're asking.

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There are not. I came up with the questions and prompts while writing the book, but it was never my intention to formally create and distribute answers.

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Thanks Larry--

BTW I am loving this book so far. I am powering through it so I can get to the Advanced PHP5 book you wrote and the PHP6. I have Safari Online so I have ALL the books you have up there bookmarked. I hope this is a good deal for you and you are fairly compensated by Safari; otherwise I could not get access to your wonderful material.

 

Cheers,

 

Vegasvikk

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Thanks for the interest in the books. As for Safari Online, I have no idea how well I'm being compensated for it, but that's the life of the writer! Glad you're able to use the resources. Note that the "PHP 6" book is actually the third edition of that book and there's a newer fourth edition: PHP and MYSQL for Dynamic Web Sites. You would also read the PHP & MySQL book after this one and before the PHP advanced.

  • Upvote 1

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I do not understand how to modify event.php so that it prints the selected days as an unordered list.

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Add an Event</title>
</head>
<body>
<?php // Script 7.9 - event.php
/* This script handle the event form. */
// Address error management, if you want.
// Print the text:
print "<p>You want to add an event called <b>{$_POST['name']}</b> which takes place on: <br>";
// Print each weekday:
if (isset($_POST['days']) AND is_array($_POST['days'])) {
foreach ($_POST['days'] as $day) {
print "$day<br>\n";
}
} else {
print 'Please select at least one weekday for this event!';
}
// Complete the paragraph:
print '</p>';
?>
</body>

</html>

Edited by Cross127

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Just open the unordered list before the foreach loop and close it after. Then, within the loop, print $day within <li> tags instead of using break.

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