PHP - Is It Possible To Make A $this Var Global For All Classes?
Hiya!
I was wondering if this is possible. Here is my example. This is a example class; <?php class a { public function __construct() { } public function returnValue() { include 'files/lang.php'; $this->lang = new lang(); return $this->lang->displayLang('10'); } } ?> This is the second class file; <?php class b { public function __construct() { } public function returnValue() { include 'files/lang.php'; $this->lang = new lang(); return $this->lang->displayLang('10'); } } ?> This is the main file; <?php include 'test/a.php'; $test = new a(); $test->returnValue(); include 'test/a.php'; $test2 = new b(); $test2->returnValue(); ?> With this I'm getting an error stating I cannot redeclare the function lang. I have found a way around this by using require_once but I was wondering if remove the include and $this->lang var from class 2 and I put this as the $this->lang var declaration in class 1; global $this->lang = new lang(); will class 1 and class 2 be able to use it from only the one declaration made in class 1. If so, would this be the way to do it or is there a better/working way to do it? Many many thanks, James. Similar TutorialsHey, I've been developing a browsergame. In this you are able to produce something ("weed"). Now I've got some kind of trouble with the function that is responsible for updating the "weed" on the user accounts. Im going to explain, how my script is working First step: Loading the datas from "worlds". In this case id, weed_factor, weed_basis. What this is required for you will see in the next steps <?php include 'includes/settings/mysql.php'; mysql_connect($dbhost, $dbuser, $dbpass); mysql_select_db($dbbase); $time = time(); $update_weed_world_data_sql = "SELECT id, weed_factor, weed_basis FROM worlds"; $update_weed_world_data_res = mysql_query($update_weed_world_data_sql) OR DIE (mysql_error()); while($update_weed_world_data_while = mysql_fetch_assoc($update_weed_world_data_res)){ $update_weed_world_id = $update_weed_world_data_while['id']; $update_weed_world_basis[$update_weed_world_id] = $update_weed_world_data_while['weed_basis']; $update_weed_world_factor[$update_weed_world_id] = $update_weed_world_data_while['weed_factor']; global $update_weed_world_basis; } Second step: This is the function which is editing each account by the data given as parameters. function do_update_weed($profile_id,$world,$update,$level,$time){ $update_weed_period = $time - $update; $update_weed_add = ($update_weed_period / 3600 * $update_weed_world_basis[$world] * pow($update_weed_world_factor[$world],$level)) +1; echo $update_weed_world_basis[$world]; echo "<br>"; mysql_query("UPDATE profiles SET weed = weed +$update_weed_add, weed_update = $time WHERE id = $profile_id LIMIT 1"); } Note: echo $update_weed_world_basis[$world]; doesnt result an output. In step three, the accounts are loaded: function todo_update_weed($time){ $todo_update_weed_sql = "SELECT * FROM profiles WHERE weed_update < $time"; $todo_update_weed_res = mysql_query($todo_update_weed_sql) or die (mysql_error()); while($todo_update_weed_while = mysql_fetch_assoc($todo_update_weed_res)){ do_update_weed( $todo_update_weed_while['id'], $todo_update_weed_while['world_id'], $todo_update_weed_while['weed_update'], $todo_update_weed_while['level_farm'], $time ); } } And the last step is calling function "todo_update_weed" with the time. todo_update_weed($time); I script calculate the time between the last update and the current time. This make a difference in time. With this value I calculate something else. And then the update time has to be saved. The script has just working fine, when I set the variable "$update_weed_add" with a fix value. But by now the script doesn't work, because I don't know how to make the array available inside functions. I considered whether I put the database-function for the world_data inside the function that updates the profiles. But if I do this, the database will be called thousands of times... Hope anybody has a nice idea to fix the problem Hi All, For the last post,I m very happy that i found out so many great mind who are watching my problem and solving online. anyway great thanks for all, just now i m making a project and i m facing problem in the below code "i need to know how can make this code easy or how can i make rdata variable accessible for the download button" generatecv.php file <?php if(isset($_REQUEST['submit'])) { $name=$_REQUEST['pname']; $pin=$_REQUEST['pin']; $mnumb=$_REQUEST['mnumber']; $tnumb=$_REQUEST['telenumber']; $email=$_REQUEST['email']; $obj=$_REQUEST['obj']; $title=$_REQUEST['jobt']; $activity=$_REQUEST['activity']; //$file=fopen('test.doc','a+'); //echo @fwrite($file,$name); //fclose($file); $rdata=""; $rdata.="<table id='cvtbl' border='0' align='center' > <th>Resume</th> <tr><td>".$name.":</td></tr><tr><td>Objective:</td></tr>"; $rdata.="<tr><td>".$obj."</td></tr>"; $rdata.="<tr><td>Email:".$email."</td></tr>"; $rdata.="</table>"; echo $rdata; echo "<style>#cv{display:none;}</style>"; echo "<form><input type='submit' name='dwnld' id='dwnld' value='Download'/></form>"; } if(isset($_REQUEST['dwnld'])) { header("Content-type:application/msword"); header("Content-disposition:attachment;filename=test.doc"); $fp=fopen("test.doc","r") or die("try again"); $data=fread($fp,filesize('test.doc')); fwrite($fp,$rdata); echo $data; fclose($fp); //echo $rdata."<br />".$rdata; } ?> this is the html file <html> <title>User details</title> <body> <form name='cv' id='cv' method="post" enctype="multipart/form-data" action='generatecv.php'> Enter your name<input type=text name=pname id=pname /> Zip Code<input type=text name=pin id=pin /> Mobile number<input type=text name=mnumber id=mnumber /> <br />Telephone number <input type=text name=telenumber id=telenumber /> Email address<input type=text name=email id=email /> <br />Enter your objective<br /><textarea name=obj id=obj cols=30 rows=5 ></textarea> <!--University Name <input type=text name=university id=university /> --> <br /><!--uni, city ,state ,type of degree ,full degree name,date--> <br /><!--Experience<br /><textarea name=exp id=exp cols=30 rows=5 ></textarea> --> Select type of resume <select name='type' id='type' onChange=''> <option value='0'>Graduate</option> <option value='1'>Post Graduate</option> <option value='2'>Non Graguate</option> <option value='3'>Other</option> </select> Job title<input type='text' name='jobt' id='jobt' /> <br /><!--company name,city ,state ,office number ,job description ,date of employment--> <br />Activity <input type=text name=activity id=activity size=100 /> <br />Honors/Awards<input type=text name=honor id=honor size=100 /> <input type='submit' name='submit' id='submit' value='Generate CV' /> <input type='reset' name='Reset' id='submit' value='Reset' /> </form> </body> </html> Many thanks in advance Hi, As the title suggests I am unsure on how to first run a query which stores values into an array. I then need to run a function multiple times but use the array within the function. How is this possible? I have had no luck figuring it out yet. 1. RUN QUERY 2. BUILD ARRAY USING QUERY RESULTS 3. RUN FUNCTION MULTIPLE TIMES 4. WITHIN FUNCTION I NEED TO USE ARRAY Many thanks Simon I need $row['con_id'] outside the function so I can put it into a query, but simply putting global in front of it won't work. What would be the right way to do? This portion of code is INSIDE a function: //Loop through the array of data while ($row = mysqli_fetch_array ($data)) { echo "<table padding='0' margin='0' class='knuffixTable'>"; echo "<input type='hidden' name='con_id' value='<?php echo " . $row['con_id'] . "; ?>' />"; echo "<tr><td width='65px' height='64px' class='avatar_bg' rowspan='2' colpan='2'><img src='$avatar_path' alt='avatar' /></td><td class='knuffix_username'><strong>" . $user_name; echo "</strong><br />" . $row['category'] . " | " . date('M d, Y', strtotime($row['contributed_date'])) . "</td></tr><tr><td>"; echo "<form action='' method='post'> <input type='submit' name='plusVote' value='Y' /> <input type='submit' name='minusVote' value='N' /> </form></td><td class='votes'>Y[ - ] | N[ - ]</td></tr>"; echo "<tr><td class='knuffix_name' colspan='3'><strong>" . htmlentities($row['name']) . "</strong><br /></td></tr>"; echo "<tr><td colspan='2' class='knuffix_contribution'><pre>" . $row['contribution'] . "</pre><br /></td></tr>"; echo "</table>"; The PHP documentation does not show any examples how to GLOBALIZE a mysqli function. I'd need a way to use $row['con_id'] outside the function for the voting script I'm writing. Thanks for the suggestions. 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; // iMagicwhat 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 BatteryI 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? This question may sound very lame... ... But I have never able to know how to define a variable that I can use in different functions in a same file. There is no class structure just a PHP file with some functions. Is it possible to use some type of variable that can be share by all functions and that variable should not be a session variable . Something like: <?php $my_global_var; function A() { // use $my_global_var here } function B() { // use $my_global_var here and should retain the last value } ?> Something like in VB6.... Thanks i have two classes and I am trying to call one class in through another here is my code but my welcome is not showing at all ever when i change the var's to 1 Code: [Select] class site { function DisplayContent ($page) { global $Users; echo '<div align="center"> <div id="Header"> <div id="NavBar">'; if ($Users->logged == 1) { echo 'Welcome '. $Users->user .' - <a href="?page=viewreminders">View Reminders</a> - <a href="?page=addreminder">Add Reminder</a> - <a href="logout.php" id="Logout">Logout</a>'; } else { echo '<a href="?page=login">Login</a> - <a href="?page=register">Register</a> - <a href="?page=forgotpassword">Forgot Password?</a>'; } echo '</div> </div> <div id="Content">'; $this->ShowPage($page); echo '</div> <div id="Footer">Copyright © '.date('Y').'<br /> Coded and Designed by Chris Cloyd</div> </div>'; } } class users { var $logged; var $user; var $email; var $level; function LogIn ($name,$email,$level) { $this->logged = 1; $this->user = $name; $this->email = $email; $this->level = $level; } function LogOut () { $this->logged = "0"; $this->user = ""; $this->email = ""; $this->level = ""; } } hello, ok if i set a Global on index.php (wwwroot/admin/index.php) it works Code: [Select] $page1='hello from page1 on index'; global $page1; echo $page1; i can echo $page1 on other pages like (wwwroot/admin/pages/home.php) and it will echo out "hello from page1 on index". GREAT but if i write a Global on (wwwroot/admin/pages/home.php) it does not work. i also can not echo it out on any other page Code: [Select] $page2='hello from page2 on home'; global $page2; echo $page2; why is this ??? Just wanted to know if $_Session was a global thing or does php require cookies setup?
I assumed that I could do something like this:
PAGE: A.php session_start(); $_Session['Cat'] = 'Meow'; // ----------------------- PAGE: B.php if (isset($_Session['Cat']) && !empty($_Session['Cat'])){ echo $_Session['Cat']; } OUTPUT: Meow // ----------------------- PAGE: C.php if (isset($_Session['Cat']) && !empty($_Session['Cat'])){ echo $_Session['Cat']; } OUTPUT: MeowI can't seem to get this to work. Page: Handler.inc // ========================================================= Session Log in / out public function logon($username, $password){ if ($username == "admin" && $password == "coffee"){ session_start(); $_SESSION['USER_STATUS'] = '1'; echo 'IN SESSION LOGIN HANDLER'; echo $_SESSION['UserLogged']; } } public function logout(){ $_SESSION['USER_STATUS'] = '0'; echo 'IN SESSION LOGOUT HANDLER'; session_destroy(); //session_unset(); }Page: index.php if (!isset($_SESSION['USER_STATUS']) && empty($_SESSION['USER_STATUS']) || $_SESSION['USER_STATUS'] == 0){ if (isset($_POST['username']) && !empty($_POST['username']) && isset($_POST['password']) && !empty($_POST['password'])){ $username = $_POST['username']; $password = $_POST['password']; echo $handler->logon($username, $password); } <LOGIN FORM CODE> }else{ if (isset($_SESSION['USER_STATUS']) && !empty($_SESSION['USER_STATUS']) || $_SESSION['USER_STATUS'] == 1){ echo 'Session name: '. $_SESSION['USER_STATUS']; } if (isset($_POST['btn_logout']) && !empty($_POST['btn_logout'])){ $handler->logout(); echo '<br />Logged out<br />'; } <LOGOUT FORM BUTTON CODE> }Could someone point me in the right direction please. It does not seem to hold its session. It's a function=> Code: [Select] function _wp_call_all_hook($args) { global $wp_filter; //var_dump($wp_filter); //exit(); reset( $wp_filter['all'] ); do { foreach( (array) current($wp_filter['all']) as $the_ ) if ( !is_null($the_['function']) ) call_user_func_array($the_['function'], $args); } while ( next($wp_filter['all']) !== false ); } Why is $wp_filter variable declared as global ? Was $wp_filter assigned before ? I use $db object to handle database function like $db->get_row for example. Is there any way that I don't need to put into every function global $db or do I actually need to repeat in every function global $db? Code: [Select] function example(){ global $db //Do I need to repeat this in each function? } I have some variables that I have set with the global command but they don't seem to be working correctly. It's probably my order of operation but not sure. Here's the stripped down version of whats going on: locator() //functions function geoip() global $zip, $city, $areacode, $metrocode, $state, $country, $latitude, $longitude; function locator() geoip() use globals from geoip pass to- ad_display() function ad_display() does some work stat_tracking() function stat_tracking() access global $zip, $city, $areacode, $metrocode, $state, $country, $latitude, $longitude; The problem is once I call stat_tracking() and try to access the global variables, they are all empty. Just to clarify the chain of events is: page loads, calls locator(), locator() calls function geoip() fine then passes work to ad_display(), ad_display() calls stat_tracking(), stat_tracking() now tries to access the globals I made but all variables are blank if I echo them. Any ideas? Can someone tell me what some of the purposes of this would be? global $PHP_SELF; its defined right after a function like this function myFunction(module =' '){ global $PHP_SELF; .... } Thanks hello. I have some oop code that pulls information about a page out of a mysql db but i dont want to put the code on every page. Instead in want to put it in the a function and pass it back to each page. do i put it in a function in my functions.php file or can i put it into my includes/pages.php includes file ?? the code looks for the page name on the page and then pulls that pages info from the db. this code works on the page - home.php Code: [Select] <?PHP require_once("../includes/initialize.php"); $currentPages = Pages::find_all(); $pName = "adminHome"; $page_id = ""; $visible = ""; $pageZones = ""; $pageCRUD = ""; $pageTypes = ""; $module = ""; $title = ""; $sub_title = ""; $description = ""; $image = ""; $about = ""; foreach($currentPages as $currentPage){ $page_id = $currentPage->id; $pageName = $currentPage->pageName; $visible = $currentPage->visible; $pageZone = $currentPage->pageZones_id; $pageCRUD = $currentPage->pageCRUD_id; $pageType = $currentPage->pageTypes_id; $module = $currentPage->module_id; $title = $currentPage->title; $sub_title = $currentPage->sub_title; $description = $currentPage->description; $image = $currentPage->image; $about = $currentPage->about; if($pageName == $pName){ echo $pageName.'<br/>'; echo $page_id.'<br/>'; echo $visible.'<br/>'; echo $pageZone.'<br/>'; echo $pageCRUD.'<br/>'; echo $pageType.'<br/>'; echo $module.'<br/>'; echo $title.'<br/>'; echo $sub_title.'<br/>'; echo $description.'<br/>'; echo $image.'<br/>'; echo $about.'<br/>'; } } ?> i would like to be able to just put global $page or something like that to get all the db info for each page. i tried this in my includes/pages.php includes file but it cant get the page name. Code: [Select] public static function find_by_pageName(){ global $database; global $pName; $sql = "SELECT * FROM ".self::$table_name." WHERE pageName=".$pName.""; $result_array = self::find_by_sql($sql); return !empty($result_array) ? array_shift($result_array) : false; } any suggestions ???? whats the best way to do this ? thanks ricky $errors=0; //NEW USER NAME HAS BEEN SUBMITTED, CHECK IT OUT AND THEN ADD IF OKAY $newuser=$_REQUEST['newuser']; function TryAgain(){ global $errors; $errors++; echo '<br/><br/>Please try again <a href="index.php?locate=admin&sub=add_admin">here</a>'; echo "<br/>errors=[$errors]"; } echo "<br/>Trying to add user: $newuser<br/><br/>"; if ($newuser){ }else{ // field was left blank, report this to user and give them option to try again echo '<br/>Field was left empty, you must pick a username.';TryAgain(); } if (strlen($newuser)<5){echo 'Username should be at least 5 characters.';TryAgain();} if (!$errors){echo "continue to SQL [errors=$errors]";} what is wrong with this code? For some reason if I increment $errors with $errors++ within the function it doesn't increment outside the function's scope. even though I declare it as a global at the start of the function. I know I'm doing something stupid here but can somebody please tell me what it is? Thanks <?php function getglobal() { global $my_global; echo "The value of \$foobar is '$foobar' <br />"; } $my_global = 20; getglobal(); ?> It's supposed to give the result, Quote 'The value of $my_global is '20'; But instead when I try it, its giving me Quote Notice: Undefined variable: foobar in C:\wamper\www\php\index.php on line 17 The value of $foobar is '' So I don't really understand what's happening and why it's not working. Hi there, I am a highly concerned about ever using global variables (as many guides I have seen on security issues with PHP say you should avoid them, kind of understand why though to be fair), but I was wanting to really understand custom based session handlers in PHP and this first one he http://uk.php.net/manual/en/function.session-set-save-handler.php on the example: 'Example #1 session_set_save_handler() example' uses them. Now would it be better to take the global variable in function: ''open()' and then return the variable $sess_save_path then pass it up to the next function that may need it perhaps? I just don't want to use globals if I can avoid it, been working out a system that work use for some old solution we use and it uses globals and it really bugs the living life out of me, why people are so lazy they can't avoid them at all costs grrr. Any advice generally speaking is of great appreciation, Jeremy. |