Put Business Logic In A Library?

i'm going to create a library that consists of a lot of separate classes.

i'm very familiar with mvc but have never created a pure library before.

i wonder where i should put the business logic? the kind of logic that usually resides in a controller in a mvc. should it be in a class or in a "bootstrap" file?

and should one file include every class, or should only one class include its classes it uses?

to clarify: my goal is not to create a mvc, but a pure library eg. email or guestbook that others can use.


Separation Of Presentation And Business Logic

I am programming my first real PHP website and am wondering how to make my code more readable to myself. The reference book I am using is PHP and MySQL Web Development 4th ed. The aforementioned book gives three approaches to separating logic and content:

include files
function or class API
template system

I haven't chosen any of these yet, as wrapping my brains around these concepts is taking some time. However, my code has become some hybrid of the first two as I am just copy-pasting away here and modifying as I go. On presentation side, all of my pages have these common elements: header, top navigation, sidebar navigation, content, right sidebar and footer. The function-based examples in the book suggest that I could have these display functions that handle all the presentation example. So, my page code will be like this:


However, I don't like this because the examples in the book have these print statements with HTML and PHP mixed up like this:

echo "<tr bgcolor="".$color.""><td><a href="".$url."">" ...

I would rather like to have HTML with some PHP in the middle, not the other way round. I am thinking of making my pages so that at the beginning of my page, I will fetch all the data from database and put it in arrays. I will also get the data for variables. If there are any errors in any of these processes, I will put them into error strings..............

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On most project I use multiple layout scripts.Sometimes I need some data in my layouts that are layout-specific, instead of page-specific. Which layout gets used though, IS page-specific.So the bootstrap or actioncontroller would be good places to select a layout. But IMHO they would not be good places to inject the data a particular layout expects. The only other place I can think of is to just write some business logic in the layout viewscript itself. Though that's something I'd rather not do either :)Where do you write your layout-specific business logic?

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How Should Partials Be Loaded When They Are Dependent On Business Logic

I'm using the term "partial" to refer to a small section of presentational code which is repeated on many views. For example, a sidebar. In vanilla PHP, where the business and presentation logic is mixed, including a sidebar is no trouble:

if($someCondition) {

However, in an MVC design pattern, the presentational logic must be kept in the view whilst the business logic must be kept in the controller. If I wish to include a partial unconditionally, then this is unproblematic since I can just have include('sidebar.php') in my view. However, I can no longer do so conditionally because that if logic is banned from my view. I have attempted a number of solutions but they all have problems. I am currently using Solution 2:

Solution 1: Create an include function in my view class which could conditionally include content from my controller. So in my controller I could have the following logic:

if($someCondition) {

Problems: sidebar.php will need to be included into index.php at a specific point requiring the include method on the view object to do some sort of parsing...........

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Is it possible to do something like MVC in procedural PHP?

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For example, when loading a page of submissions I have a loop that looks something like this (condensed version):

while ($row = mysql_fetch_assoc($submissionQuery))
$submissionID = $row['id'];[code]...

The reason why I don't just enclose the entire block in PHP is because there is not only an h3 there and I don't want to use mass-echo statements.In my opinion this looks terrible and I'd like to know a better way of doing it. I suppose that I could store all the submissions in to an array and then loop through them later on but I see several downsides to this:

1) Unnecessarily storing values in to an array. Only going to recall them immediately after.

2) If there are a lot of submissions there may not be enough memory to store them.

3) Would require more code.

4) Would still have to loop through the array later on and in that case I am still mixing PHP and HTML (just to a lesser degree)

I don't know. I just need some advice as to best handle this because I don't want to do things the wrong way and then have to refactor everything later on when something breaks or gets too complex.

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I use PHP quite a bit, and whenever I see a "PHP-hate" thread on some forum or even popular PHP-related discussions here, I usually see something along the lines of:

PHP is too messy/sloppy/crappy, because you have a tangled web of presentation and logic.

Then I see the PHP-Defenders replying to some version of the above saying that is isn't necessarily true. I got to thinking "How is this possible...?" and "What counts as mixing presentation with logic?" I couldn't figure it out, so now I'm here.

Which of these is the best practice? Or is there an even better way that I'm not aware of?

if(!function()) {
echo '<div id="results">The result is a lie.</div>';
<div id="results">
if(!function()) {
echo 'The result is a lie.';

I know the above examples don't really look like a big deal, but after browsing through web apps of mine, I realized it was all kind of messy (because I was mixing HTML and PHP), so I was hoping there was a good way to develop while keeping things nice and neat.

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Ideally, we should be able to:
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checklist (first phone contact, second phone contact, visit, etc)
- a check list for any customer type.
- a calendar/user, allowing to know where the commercial is. This should
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since they are at home, we can't see if they really work or not.

Obviously, any item should be filled by any user, and there should be a
possibility to know who did any item. (who contacted the user, who filled
the address...).

The idea is to be able to fill the address when it's time to (evening,
week-ends) by an user, and then when the commercial connect to the page (or
even by email with a link) he knows he must contact the client.

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PHP Code:

function getWorkingDays($startDate,$endDate,$holidays){
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//We add one to inlude both dates in the interval.
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For example:


Will create an array like the following:

[0] ="2008-01-01",
[1] ="2008-01-05",
[2] ="2008-01-06",
[3] ="2008-01-07",


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Filename must be all in lowercase
Filename can only contain charaters [a-z0-9_-]
I must be able to rename file

How would you go about if a filename is my.file(name).jpeg ?I could explode the filename on '.' and save the extension, then implode to get the filename again. But not sure if that's the best soltion.I have the following functions that helps a bit:

function getExts($filename) \

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I am seeking to learn how to implement a grid in an application I am working on and I figured I will use zfdatagrid as it seems to take care of some of the features I need. However there is not much by way of tutorial on the net. Probably because its easy to figure out, but thing is I need help to understand how use it. I will appreaciate any link that can help or if one will be kind to give me some pointers here.

I now get the following error:

Fatal error: Class 'Bvb_Grid' not
found in

and below is my indexAction
public function indexAction()
$config = new Zend_Config_Ini(getcwd().'..applicationgridsgrid.ini', 'production');
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$grid = Bvb_Grid::factory('Bvb_Grid_Deploy_Table', $config, 'id');
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//CRUD Configuration
$form = new Bvb_Grid_Form();
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$this->view->pages = $grid;

The Bvb library is located in the Library folder.

Well silly me I found the solution to the problem in another Stack Overflow thread Zend Framework 1.10 custom Class inside library folder not found

I thought of deleting the question then I thought this may save someone following this thread a google.

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For example:
if (!$_SESSION['count']) {
echo "Not registered<BR>";
$_SESSION['count'] = 1;
$count = 1;
} else {
$count = $_SESSION['count']++;
echo "count is '$count'";

Always shows count as 1.

The yahoo site uses PHP Version 4.3.6.
The only difference relevant I can see in the two sites is
session.use_trans_sid which is off on Yahoo. Enabling this with ini_set
didnt help. Saving session information in the DB using custome session
handlers didnt help either.
Any ideas as to why this may be happenning?

Other relevant php info is pasted below:

Session Support enabled
Registered save handlers files user

Directive Local Value Master Value
session.auto_start Off Off
session.bug_compat_42 On On
session.bug_compat_warn On On
session.cache_expire 180 180
session.cache_limiter nocache nocache
session.cookie_domain no value no value
session.cookie_lifetime 0 0
session.cookie_path / /
session.cookie_secure Off Off
session.entropy_file no value no value
session.entropy_length 0 0
session.gc_divisor 100 100
session.gc_maxlifetime 1440 1440
session.gc_probability 1 1
session.referer_check no value no value
session.save_handler files files
session.save_path /tmp /tmp
session.serialize_handler php php
session.use_cookies On On
session.use_only_cookies Off Off
session.use_trans_sid Off Off

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1) Let the database handle it for me and use the database exception to tell the user something like: "Can't delete this part or make this change because of [insert reason]" Reasons I like this: seems easy, simpler to handle concurrency problems Reasons I don't like this: 1) seems to go against good app design

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