PHP - Classes And Included Files

This may sound like a very stupid question, but I can't find a clear answer anywhere.

I'm making my first dive in OOP and all the tutorials only really show basic usage. They define a class, and show how to use it in a file.

My question is how does it work to use an object throughout a program? Is it available everywhere or do I store things in sessions and start a new object on each page?

For example: logging in a user. If I created an instance after confirming the credentials, would that same instance be available for use in say index.php, or would I just pass a session over and create a new instance on each page?

Again, sorry if this seems dumb to some people.

I am rebuilding a CMS system that I have been developing over the last ~6 years. 
It needs to have many different kinds of modules depending on the installation (Like Drupal or Joomla does)

I have a Core class that does the major processing.
 
I am currently developing the part of the system that loads the actual module into the index.php page.

While experimenting I came up with an idea that is probably really horrible but I started to wonder if maybe it could actually work well.

I am looking for feedback on this Core class function:

Code: [Select]
public function LoadMods($ModsToLoad)
{
foreach ($ModsToLoad as $mod)
{
$MainFile = ABSPATH.DS.$mod.DS.'main.php';
if (file_exists($MainFile)) include ($MainFile);
else $this->_MAIN .= 'Error: The "main" file for "'.$mod.'" module could not be found<br/>';
}
}

It will receive an array of Module names and those names correspond to a directory that holds the "main.php" file for that module.

Example:

index.php?mod=Photos
Will load the "Photos" module.


Here is the thing that has me concerned...

A module might have it's own class or classes and that class will likely get included in the "main.php" file for that module.
What effect is that going to have on my core class because it starts nesting classes inside classes.
Is this an efficiency advantage or am I heading down a road paved by code stink?

What's you opinion?

I've been spending long hours learning about classes and their magic methods. I just came across a tutorial which showed a constructor like this:

class Device {
    //...
    public function  __construct(Battery $battery, $name) {
        // $battery can only be a valid Battery object
        $this->battery = $battery;
        $this->name = $name;
        // connect to the network
        $this->connect();
    }
    //...
}

the Battery part instantly caught my attention. Here had previously made a Battery class (and a more complete Device class) but the next thing he did really caught my interest:

$device = new Device(new Battery(), 'iMagic');
// iMagic connected
echo $device->name;
// iMagic

what the hell is going on here? Is this another way to include the methods and properties of one class into another class, in order words is this the same thing as:

class Device extends Battery

I don't think so because this new Battery() thing looks more like its creating an object inside the Device object. Previously the only way I could to that was to type $battery = new Battery() inside one of my methods. But this looks like hes doing something different. Can anyone explain whats going on here?   The whole tutorial is he http://code.tutsplus...-php--net-13085 in the main Device method he has a premade $battery variable to hold the Battery object. Sometimes I have multiple classes containing functions which I'd like to include in my main class. I can only extend one class, so I usually extent a class containing only properties, no methods. I still don't know what difference making that info class abstract is, I'd appreciate if anyone could tell me.   Also I'd love to know what the point in static methods is. I've never used them because I've never seen the point. Is it just to make it easier to call the methods because you don't need to create an object instance to call them? Sorry for the extra questions, the first one is what I'm really wondering about.    

Not sure how to describe what I'm trying to do here in the title, but here goes with what I am trying to accomplish.

I've got a few hundred lines of code in total so far, so I'll try to keep it as short as I can. I've got an application that I am programming using classes for each module and right now I am coding the base classes that I need in order for it to run (database, errors, logging, etc). What I'm doing for my database class is I have a query factory and it extends the MySQLi class so I can process, clean and code the rest of my app faster. I also have another, unrelated class "Error", which will be used for processing errors I might come across.

I'd rather do it this way instead of having to call trigger_error and error_log every time there is an error. I'd also not like to have to call a new instance of an object every time I need to use something from that class. Is there any way I can call a class within a class and return it as an object for all the methods within the class?

I've tried the methods below, but no luck I've tried others, but I'm trying to keep it brief and get what I'm trying to do across.

<?php

class QueryFactory extends MySQLi {

public  $err = new error(); //Doesn't work.
public  $err = error(); //Nope.

#This is the function that I need the $err object for.
function set($fields, $newvals) {

if ( is_array($fields) && is_array($newvals) ) {

if ( count($fields) != count($newvals) ) {
//Instead of below, I want to do something like $err->('Array lengths must match for method', 256, $islogged = 1);
                              trigger_error('Array lengths must match for method', 256);
}

}
}

}


The thing is, I have a "run.inc.php" which does include and create new objects for running just the basic app and if I try to redeclare the error class in query.class.php, it gives me an error saying I can't do that, but if i try to call $err from the page that has all the classes defined it throws an error saying that my method is undeclared. I'd like my error class be available to every other class I create so I can display and log errors as needed. Any suggestions or links to point me where I'd like to go?

Hi,

Im in trouble with a script. Mainly the problem is that the declared value is not reachable.

lets sai i have main.php file where i declare that

$user_id = '22';
and then i include a file that needs to get that value to work
include('somescript.php');

now when i go over to the somescript.php i write at the top that print $user_id; and i get nothing.

What am i doing wrong?

I understand that this is a header error but i still do not know how to fix it.
I am trying to create a login box that is in the top right corner of my site. Once the user uses it to log in they need to be redirected to the account page. i include the login_box.php file in the appropriate div. however the file uses header("Location: account.php"); to redirect the user. because this file is included after the header i receive Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\index.php:17) in C:\xampp\htdocs\layout_inc\login_box.php on line 76
What would be the correct way to do this. My code is bellow. Thank you in advance
<?php 
//Forms posted

if(!empty($_POST))
{
$errors = array();
$username = trim($_POST["username"]);
$password = trim($_POST["password"]);
$remember_choice = trim($_POST["remember_me"]);

//Perform some validation
//Feel free to edit / change as required
if($username == "")
{
$errors[] = lang("ACCOUNT_SPECIFY_USERNAME");
}
if($password == "")
{
$errors[] = lang("ACCOUNT_SPECIFY_PASSWORD");
}

//End data validation
if(count($errors) == 0)
{
//A security note here, never tell the user which credential was incorrect
if(!usernameExists($username))
{
$errors[] = lang("ACCOUNT_USER_OR_PASS_INVALID");
}
else
{
$userdetails = fetchUserDetails($username);

//See if the user's account is activation
if($userdetails["Active"]==0)
{
$errors[] = lang("ACCOUNT_INACTIVE");
}
else
{
//Hash the password and use the salt from the database to compare the password.
$entered_pass = generateHash($password,$userdetails["Password"]);

if($entered_pass != $userdetails["Password"])
{
//Again, we know the password is at fault here, but lets not give away the combination incase of someone bruteforcing
$errors[] = lang("ACCOUNT_USER_OR_PASS_INVALID");

}
else
{
//Passwords match! we're good to go'

//Construct a new logged in user object
//Transfer some db data to the session object
$loggedInUser = new loggedInUser();
$loggedInUser->email = $userdetails["Email"];
$loggedInUser->user_id = $userdetails["User_ID"];
$loggedInUser->hash_pw = $userdetails["Password"];
$loggedInUser->display_username = $userdetails["Username"];
$loggedInUser->clean_username = $userdetails["Username_Clean"];
$loggedInUser->remember_me = $remember_choice;
$loggedInUser->remember_me_sessid = generateHash(uniqid(rand(), true));
//Update last sign in
$loggedInUser->updateLastSignIn();

if($loggedInUser->remember_me == 0)
$_SESSION["userCakeUser"] = $loggedInUser;
else if($loggedInUser->remember_me == 1) {
$db->sql_query("INSERT INTO ".$db_table_prefix."Sessions VALUES('".time()."', '".serialize($loggedInUser)."', '".$loggedInUser->remember_me_sessid."')");
setcookie("userCakeUser", $loggedInUser->remember_me_sessid, time()+parseLength($remember_me_length));
}

//Redirect to user account page

header("Location: account.php");
die();
}
}
}
}
}

if(!isUserLoggedIn()) {?><form name="newUser" action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
                <table>
<tr>
<td>
<label>Username:</label>
</td>
<td>
<input type="text" name="username" />
</td>
</tr>
<tr>
<td>
<label>Password:</label>
</td>
<td>
<input type="password" name="password" />
</td>
</tr>
<tr>
<td>
<label>&nbsp;</label>
<input type="submit" value="Login" class="submit"/>
</td>
<td>
<input type="checkbox" name="remember_me" value="1" /> <label style="font-size:12px">Remember Me?</label>
</td>
</tr>
</table>
<div style="text-align:center;">
<a href="register.php" class="info">Register</a> | <a href="forgot-password.php" class="info">Forgot Password?</a>
</div>
</form><?php }
else{?><h1>Welcome <?php echo $loggedInUser->display_username; ?> </h1>
 <br/>

<a href="account.php" class="info">Dashboard</a> | <a href="logout.php" class="info">Logout</a><?php }

?>

I hope that subject made sense!

I have a page where I want to generate page-specific keywords automatically. Actually I have some general keywords stored in a text file and then I add the page-specific ones after those. The problem is, however, solely caused by the keywords I pull from my text file. A "1" is added to my list of keywords. Consider a news page like so:

news.php
// ...
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name="keywords" content="<?php require('php/generateKeywordList.php'); ?>" />
</head>
// ...

And then generateKeywordList.php
// I have omitted the part with the page-specific keywords, because it is not what causes the problem (commented it all out)
set_include_path('/mypath/');
$str = require_once('includes/websiteKeywords.txt');
echo $str; // For some reason, the number 1 is added at the end of this string


websiteKeywords.txt (it doesn't matter what I put in there)
Code: [Select]
these, are, my, keywords, for, my, website
In my meta tag, the above would be displayed as:
Code: [Select]
these, are, my, keywords, for, my, website1
I then tried to make a simple php page like this

$keywords = require('includes/websiteKeywords.txt');
echo $keywords;

... and it worked. At the moment I have absolutely no idea where the number 1 comes from.

So, basically if I include the keywords directly from the text file into my meta tag, it displays fine. If I make a simple php page where I echo out the keywords from the text file, it displays fine. But if I include my php script, which echos the keywords, into my meta tag, the number 1 is added at the end of the string.

Am I completely missing something here or is this extremely strange?


Thanks for any help!

Hello:

I have this code in an included file:
myNav.php
Code: [Select]
function spLeftMenu() {
$spLeftMenu =
"
<p>
<div id=\"myLeftNavPaper\">
<img src=\"images/sidePaperTop.png\" alt=\"\" />

<div id=\"myLeftNavPaper2\">

echo \". $mySideBarPageData .\"

</div>

<img src=\"images/sidePaperBottom.png\" alt=\"\" />
</div>

</p>

";
return $spLeftMenu;
}

I can not get:
Code: [Select]
echo \". $mySideBarPageData .\"

To display the results on this page:
Page.php
Code: [Select]
<html>
...

<?php echo spLeftMenu(); ?>

...
</html>


What am I missing ??

So far I have managed to create an upload process which uploads a picture, updates the database on file location and then tries to upload the db a 2nd time to update the Thumbnails file location (i tried updating the thumbnails location in one go and for some reason this causes failure)

But the main problem is that it doesn't upload some files

Here is my upload.php

<?php
include 'dbconnect.php';

$statusMsg = '';

$Title = $conn -> real_escape_string($_POST['Title']) ; 
$BodyText = $conn -> real_escape_string($_POST['ThreadBody']) ; 
	 

// File upload path
$targetDir = "upload/";
$fileName = basename($_FILES["file"]["name"]);
$targetFilePath = $targetDir . $fileName;
$fileType = pathinfo($targetFilePath,PATHINFO_EXTENSION);
$Thumbnail = "upload/Thumbnails/'$fileName'";

if(isset($_POST["submit"]) && !empty($_FILES["file"]["name"])){
    // Allow certain file formats
    $allowTypes = array('jpg','png','jpeg','gif','pdf', "webm", "mp4");
    if(in_array($fileType, $allowTypes)){

        // Upload file to server
        if(move_uploaded_file($_FILES["file"]["tmp_name"], $targetFilePath)){

            // Insert image file name into database
            $insert = $conn->query("INSERT into Threads (Title, ThreadBody, filename) VALUES ('$Title', '$BodyText', '$fileName')");
            if($insert){
               $statusMsg = "The file ".$fileName. " has been uploaded successfully."; 

		$targetFilePathArg = escapeshellarg($targetFilePath);
		$output=null;
		$retval=null;
		 //exec("convert $targetFilePathArg -resize 300x200 ./upload/Thumbnails/'$fileName'", $output, $retval);
		 exec("convert $targetFilePathArg -resize 200x200 $Thumbnail", $output, $retval);
		echo "REturned with status $retval and output:\n" ; 
		if ($retval == null) { 
		echo "Retval is null\n" ;
		echo "Thumbnail equals $Thumbnail\n" ; 
		}

            }else{
                $statusMsg = "File upload failed, please try again.";
            } 
        }else{
            $statusMsg = "Sorry, there was an error uploading your file.";
        }
    }else{
        $statusMsg = 'Sorry, only JPG, JPEG, PNG, GIF, mp4, webm & PDF files are allowed to upload.';
    }
}else{
    $statusMsg = 'Please select a file to upload.';
}

//Update SQL db by setting the thumbnail column to equal $Thumbnail
$update = $conn->query("update Threads set thumbnail = '$Thumbnail' where filename = '$fileName'");
            if($update){
               $statusMsg = "Updated the thumbnail to sql correctly.";
		echo $statusMsg ;  } 
else 
{ echo "\n Failed to update Thumbnail. Thumbnail equals $Thumbnail" ; } 


// Display status message
echo $statusMsg;
?>

And this does work on most files however it is not working on a 9.9mb png file  which is named "test.png" I tested on another 3.3 mb gif file and that failed too?

For some reason it returns the following

Updated the thumbnail to sql correctly.Updated the thumbnail to sql correctly.

Whereas on the files it works on it returns

REturned with status 0 and output: Retval is null Thumbnail equals upload/Thumbnails/'rainbow-trh-stache.gif' Failed to update Thumbnail. Thumbnail equals upload/Thumbnails/'rainbow-trh-stache.gif'The file rainbow-trh-stache.gif has been uploaded successfully.

Any idea on why this is?

Hello


I have a simple question about file handling...


Is it possible to list all files in directories / subdirectories, and then read ALL files in those dirs,
and put the content of their file into an array?

Like this:

array:
[SomePath/test.php] = "All In this php file is being read by a new smart function!";
[SomePath/Weird/hello.txt = "Hello world. This is me and im just trying to get some help!";

and so on, until no further files exists in that rootdir.

All my attempts went totally crazy and none of them works... therefore i need to ask you for help.


Do you have any ideas how to do this?
If so, how can I be able to do it?


Thanks in Advance, pros

I have created a script (single file) that works fine when testing it alone, but when included it doesn't and rest of page is blank.

What could cause this? Is this because of some "mismatch" between the queries, variables used on the included file and the existing file?

Say I have...

Code: [Select]
<?
echo("do something");
include("include_file.php");
echo("do something else");
?>

include_file.php
Code: [Select]
<?
$a_$string = "a string";
echo($a_string);
?>

I have put an error in the include_file.php  an extra $ in the variable name.

The first script would kick up an error that there is a problem with file   include_file.php  as line 3 or what ever the line may be.

How can I have it so I can choose what the error message is, say a cryptic code and the line number without having the file names show as this is showing up my hidden includes folder and the file name which means that someone may try to visit this page alone and this can cause security issues.

Adding in extra lines to every file to see if it is being use correctly a bit like sessions is not an option although I have looked at it as I have houndreds of files to alter in this case.


I have just tried this instead of the top script but I does not show the secret code on error
Code: [Select]
<?
echo("top");
@include("dummy.php") or die("secreterrorcode123");
echo("bottom");
?>

Hi,
My issue here is that I cant get my if/else statement to work on my secondary page. I include my secondary page (fine.php) from my index page. However, I have an if/else statement in fine.php that keeps reverting back to the index.php and, therefore, outputs the else statement (404.php)

here is the if/else on index.php (these links work fine):

<?php
if($_SERVER['QUERY_STRING']=='/index.php' || $_SERVER['QUERY_STRING']=='')
{
include 'port.php';
}

elseif (isset($_GET['pos'])){
include 'pos.php';
}

elseif (isset($_GET['web'])){
include 'web.php';
}

elseif (isset($_GET['fine'])){
include 'fine.php';
}

        else {include '404.php';}






here is the if/else on my secondary page (fine.php). These links are supposed to alert the if/else in the next table cell. However, they instead alert the if/else in index.php.


<td><br/>
<a href="?backset"><img src="fine/thumbs/x-backset.jpg" border="0"></a><br/><br/> 
<a href="?backside"><img src="fine/thumbs/x-backside.jpg" border="0"></a><br/><br/> 
<a href="?bannerprint"><img src="fine/thumbs/x-bannerprint.jpg" border="0"></a><br/><br/> 
<a href="?chopu"><img src="fine/thumbs/x-chopu.jpg" border="0"></a><br/><br/> 
</td>
<td><br/>
<div id="DivPiece" align="left">
<?PHP 

if (isset($_GET['backset'])){
       include 'fine/backset.php';
}

elseif (isset($_GET['backside'])){
     include 'fine/backside.php';
}

elseif (isset($_GET['bannerprint'])){
     include 'fine/bannerprint.php';
}

elseif (isset($_GET['chopu'])){
include 'fine/chopu.php';
}

?>
</div>
</td>



How can I get the links on the secondary page to only alert the if/else statement on that page, and BLOCK the if/else statement on index.php from seeing them? I still want to use the query string though.

Thanks!

Hey!

I have a small code where I want to check if one variable matches the other when the other is sent through a function. The function, for practical reasons, is included with a separate PHP-file. And I cant seem to apply a variable to the function which processes the other variable. Its really wierd to me.

Here is the code for the main PHP-file:

Code: [Select]
<?php

include 'function.php';

$unformatted = "FORMATTING AY ...";

$formatted1 = "formattingay...";

$formatted2 = test_format($unformatted);

if ($formatted1 == $formatted2) {
     echo "Success, formatted!";
} else {
     echo "Fail, unformatted.";
}

?>
And here is the code for "function.php":

Code: [Select]
<?php

function test_format($var) {
     strtolower(str_replace(array(" "), array(""), $var));
}

?>
Does anybody have a clue to why this simply wont work? Any answers and help is highly appreciated!

I have a snippet of code like this below.  If I have it directly on my page, it works fine.  But if I move this snippet of code into an include file and use "require_once('thefile.php');", the code no longer works properly.  How is that possible? FYI, this snippet is in the middle of a for loop on the regular page.  Maybe you can't use includes when in a loop? I don't know.  Makes no sense that it works when on the page, but not when included using require once.

Any thoughts how this could be possible?  I imagine there is some rule with include files that I'm missing???

This is the code and I don't think it matters exactly what its doing so I won't bother you with that.  This is how it looks on the page itself...

Code: [Select]
    if ($type=="one") {
$_SESSION['cluenum']=1; //so clue #1 begins as the selected clue
echo "<script type='text/javascript'>document.getElementById('clue1').style.border = '1px solid red';</script>";  //sets the styling on clue #1
$allcode = "onclick='setnumber($i);'";
} else {
// type must be equal to all, so don't do anything special
$allcode="";
}




This is how it looks in the include file... Code: [Select]
<?php
    if ($type=="one") {
$_SESSION['cluenum']=1; //so clue #1 begins as the selected clue
echo "<script type='text/javascript'>document.getElementById('clue1').style.border = '1px solid red';</script>";  //sets the styling on clue #1
$allcode = "onclick='setnumber($i);'";
} else {
// type must be equal to all, so don't do anything special
$allcode="";
}

?>