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PHP - Problem With Global Variables
$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 Similar TutorialsI 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 $db //Do I need to repeat this in each function? } I need the following three variables to be available globally, that is to every page. (An common header.html uses them at every page). Please teach me how to initialize them. (inside the header.html maybe?) 'U_M_CODE' => append_sid("{$phpbb_root_path}faq.$phpEx", 'mode=bbcode'), 'U_M_TERMS' => append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=terms'), 'U_M_PRV' => append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=privacy'), Thank you. 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 $sess_save_path then pass it up to the next function that may need it perhaps? I just don't want to use globals if I can avoid it, been working out a system that work use for some old solution we use and it uses globals and it really bugs the living life out of me, why people are so lazy they can't avoid them at all costs grrr. Any advice generally speaking is of great appreciation, Jeremy. If I want to load some user information from the database into an object/array and share it throughout my application, what's the best approach for this? Here is what I thought of doing: - I can call a function (e.g user_info() ) that will return the user information whenever I need it , but It'll have to run a DB query each time I call it. - Load user information once from the DB, assign it into a global array/object, then call that object whenever I need it. A lot of people recommended against using global variables, but I think performance wise it's better than running a query each time. Are there any better alternatives than the above approaches? Hello I've have read that global variables should not be used. so if i have 2 .php files: index.php - main content php file sitefunctions.php - php functions site file on my index.php page i have the following (an example of my problem): <?php displayError($errorID); ?> and in the sitefunctions.php file i have the following (an example of my problem): <?php function displayError($errorID) { if($errorID == 1) { echo "Password Failure"; } else { echo "Other Failure"; } } ?> now that works but since when first accesing that page the $errorID is not set then i get an error. How can i achieve this without first setting a blank $errorID global variable? Thanks Hi, In all my classes, I need to declare globals for everything else, from site variables even to objects (other classes). I obviously don't want to as globals are horrible and I need to have functions clean without globals. I have included a list of all the global vars in the construct and it still doesn't work. Example: start.php <?php $vars = array(some values); $some = more; $variables = foo; $helper = new Helper(); $home = new Home(); This is a little bit simplistic, but for some reason, the variables just don't want to go in the main class without a global. Functions will not run if they require any of these variables. Hello, my global variable is getting whacked (defined null or being undefined) after a function call. I'm not sure if it's happening when leaving the function that assigns it or when the form is "posted", or something else. Code: [Select] <? //global variables $globalVarString = ""; //function definitions function displayResults() { global $globalVarString; if ($globalVarString == "") {displayForm("please enter your search string again");} else {displayForm("you typed: $globalVarString");} } function getResults($searchInput) { global $globalVarString; $globalVarString = $searchInput; //give status ?> <html><head><title>Search</title></head><body> <form action="<?=$_SERVER['PHP_SELF']?>" method="post"> Thanks for entering your data (<? echo "$globalVarString" ?>).<br><br>Please press the submit button to process your data    <input type="Submit" value="Submit" name="processQuery"> </form></body></html> <? } function displayForm($message) { //prompt for input ?> <html><head><title>Search</title></head><body> <form action=" <? $_SERVER['PHP_SELF'] ?>" method="post"> <h3>Please enter your search <input type="text" name="searchString">    <script type="text/javascript">document.forms[0].searchString.focus();</script> <input type="Submit" value="Submit Query" name="searchQuery"></h3> </form> <? if (!$message == ""){echo "<br>    <h4>" . $message . "</h4><br>";} ?> </body></html> <? } //main() if(array_key_exists('searchQuery', $_POST)) {getResults($_POST['searchString']);} elseif (array_key_exists('processQuery', $_POST)) {displayResults();} else {displayForm("");} ?> This topic has been moved to Third Party PHP Scripts. http://www.phpfreaks.com/forums/index.php?topic=350034.0 How would I output the value of a variable, getting the name from the value of another variable? For example: $var1 = 'var2'; $var2 = 'output'; I want it to return 'output', which I'd imagine would work through entering something along lines of $$var1; Does anyone know what I mean? I am having probelm in saving Session variables ALthough I'm writing session_start(); in the header of my php script and saving the values of Session array in the next page. It does not print the values or show right results. Code: [Select] session_start(); require_once ("functions.php"); $token=$_GET['t']; if(!isset($token)){ $name = stripslashes($_POST['username']); $email = stripslashes($_POST['email']); check_validate_input($name, $email); } if($token=='register') { show_registration_form(); } $my_model = new model(); $arr_info = $my_model->check_members($name,$email); if (($arr_info==NULL)&&($token!='register')) { echo '<p> Hello Guest</p><br />'; show_mailing_form(); } else if (($arr_info['role']=='user')||($arr_info['role'] == 'admin')) { $_SESSION['userId']=$arr_info['id']; $_SESSION['user_role']=$arr_info['role']; $_SESSION['user_name']=$arr_info['name']; print_r ($_SESSION);} here it does not print session array. This code was given to me by mjdamato to help display a student and the course that student has take and within that the modules in the course and the sessions in course including module mark and grade and student's session marks and grades. I am very weak on php code as I have only done it once and that was following a php workbook 2 years ago. I am more of a database specialist. Below is the code given to me and you can also download the code from the attachment: Code: [Select] <?php function outputModule($moduleID, $moduleName, $sessionData) { if(!count($sessionData)) { return false; } $markTotal = 0; $markGrade = 0; $weightSession = 0; $grade = ""; $sessionsHTML = ""; foreach($sessionData as $session) { $sessionsHTML .= "<p><strong>Session:</strong> {$session['SessionId']} <br><strong>Session Mark:</strong> {$session['Mark']}</strong> <br><strong>Session Weight Contribution</strong> {$session['SessionWeight']}%</p>\n"; $markTotal += round($session['Mark'] / 100 * $session['SessionWeight']); $weightSession += ($session['SessionWeight']); $markGrade = round($markTotal / $weightSession * 100); if ($markGrade >= 70){ $grade = "A";} else if ($markGrade >= 60 && $markGrade <= 69){ $grade = "B";} else if ($markGrade >= 50 && $markGrade <= 59){ $grade = "C";} else if ($markGrade >= 40 && $markGrade <= 49){ $grade = "D";} else if ($markGrade >= 30 && $markGrade <= 39){ $grade = "E";} else if ($markGrade >= 0 && $markGrade <= 29){ $grade = "F";} } $moduleHTML = "<p><br><strong>Module:</strong> {$moduleID} - {$moduleName} <br><strong>Module Mark:</strong> {$markTotal} <br><strong>Mark Percentage:</strong> {$markGrade} <br><strong>Grade:</strong> {$grade} </p>\n"; return $moduleHTML . $sessionsHTML; } $output = ""; $studentId = false; $courseId = false; $moduleId = false; while ($row = mysql_fetch_array($result)) { if($studentId != $row['StudentUsername']) { //Student has changed $studentId = $row['StudentUsername']; $output .= "<p><strong>Student:</strong> {$row['StudentForename']} {$row['StudentSurname']} ({$row['StudentUsername']})\n"; } if($courseId != $row['CourseId']) { //Course has changed $courseId = $row['CourseId']; $output .= "<br><strong>Course:</strong> {$row['CourseId']} - {$row['CourseName']} <strong>Course Mark</strong> <strong>Grade</strong> <br><strong>Year:</strong> {$row['Year']}</p>\n"; } if($moduleId != $row['ModuleId']) { //Module has changed if(isset($sessionsAry)) //Don't run function for first record { //Get output for last module and sessions $output .= outputModule($moduleId, $moduleName, $sessionsAry); } //Reset sessions data array and Set values for new module $sessionsAry = array(); $moduleId = $row['ModuleId']; $moduleName = $row['ModuleName']; } //Add session data to array for current module $sessionsAry[] = array('SessionId'=>$row['SessionId'], 'Mark'=>$row['Mark'], 'SessionWeight'=>$row['SessionWeight']); } //Get output for last module $output .= outputModule($moduleId, $moduleName, $sessionsAry); //Display the output echo $output; } } ?> Below the what this code outputs: Student: Mayur Patel (u0867587) Course: INFO101 - Bsc Information Communication Technology Course Mark Year: 3 Module: CHI2550 - Modern Database Applications Module Mark: 41 Mark Percentage: 68 Grade: B Session: AAB Session Mark: 72 Session Weight Contribution 20% Session: AAE Session Mark: 67 Session Weight Contribution 40% Module: CHI2513 - Systems Strategy Module Mark: 31 Mark Percentage: 62 Grade: B Session: AAD Session Mark: 61 Session Weight Contribution 50% If you look above it shows that there is nothing in the Course Mark: section, what Course Mark is suppose to do is total up all the module mark percentages and then divide it by the number of modules. So the calculation will be adding up all the Code: [Select] $markGrade and dividing it by count Code: [Select] $ModuleID. In examle above it will be 68 (mark percentage for 1st module) + 62 (mark percentage for 2nd module) / 2 (number of modules in the course). So the Course Mark should equal 65. The problem is that all of the calculations are in the foreach loop but where the course details and where the course marks are going to be placed are in the while loop. So the problem is that if the total Course Mark (lets say we call in $totalCourse) is displayed in the while loop it will provide an undifined index as the calculation will be placed with the other calculations in the foreach loop which is outside the while loop, if I do the calculation with in the while loop, it will only choose the 1st module mark percentage and divdie it by the first module only, this is obviously incorrect as it sohuld try and do this for all modules hence why my calculations are in the foreach loop which does this. So how will change the code so that the course details can go from the while loop and be placed in the foreach loop so then I can include the calculation in the foreach loop. Thank You and hopefully you understand it, just read it very carefully to understand it, it is very simple what I want to achieve but I do not know how to do it. [attachment deleted by admin] Hi I have an infuriating problem which is stalling me with two large projects for a well known NGO right now. I am using mysqli and bound variables where the number of variables to bind is dependent on user input. I have a version of the code below working in php 5.2 but as of php 5.3 this method is no longer valid, specifically due to a change in the behavior of call_user_func_array with bound variables as arrays. I have read about this problem eslewhere but cannot get any of the workarounds to work with my example. Any help would be greatly appreciated. Code: [Select] # $parts is an array with variable number of values # $type is an array with variable number of values # $params is an array with variable number of values $query = 'SELECT SQL_CALC_FOUND_ROWS DISTINCT taxon.TaxonID, FROM taxon WHERE . join('', $parts) . " ORDER BY taxon.TaxonID"; # Prepare stmt if ($stmt = $mysqli->prepare($query)) { call_user_func_array (array($stmt, 'bind_param'),array_merge(array(join('', $type)), $params)); # execute $stmt->execute(); # bug info echo $stmt->errno, ':', $stmt->error; #store result $stmt->store_result(); # bind results $stmt->bind_result($ID); # fetch values while ($stmt->fetch()) { # results code goes here! } # free memory $stmt->free_result(); # close statement $stmt->close(); } what is the problem in this code <div id="product"> <a class='inline' href="?prod=<?php echo $row['id'];?>#<?php echo $row['id']; ?>" > ..... </a> </div> <div style='display:none'> <div id='<?php echo $row['id'];?>'> .... </div> </div> $prod=$_GET['prod']; echo "the value of prod".$prod; $_SESSION['cart']=$prod; <script> $(document).ready(function(){ //Examples of how to assign the ColorBox event to elements $(".inline").colorbox({inline:true}); }); </script> Hello I first should say that I am a beginner. And actully friend was helping me with this but can't really contact him right now so I have to ask here. I have a php file where I have birthdate dropdown menu for month, day and a year and JS that just has all of the details about those 3 "variables" but the problem I am having is that this is inside submit form and whenever I or someone else submits this form and doesn't put any birthdate inside it doesn't show anything like "Please select your birthdate or something like that." and I honestly tried pretty much everything now but can' t get the answer on how to do that. Please help me. :( As the topic sais i have a problem trying to send variables to a javascript popup window, i think the problem is on line 38. I would very much appreciate some help Code: [Select] <html> <head> <script type="text/javascript"> function newPopup(url) { popupWindow = window.open(url,'popUpWindow','height=700,width=400,left=10,top=10,resizable=no,scrollbars=no,toolbar=yes,menubar=no,location=no,directories=no,status=yes') } </script> </head> <?php error_reporting(E_ALL); require_once 'GameQ.php'; $servers = array( 'server 1' => array('cs', 'd2o.warzone.nu', '27015'), 'server 2' => array('cs', 'd2o.warzone.nu', '27017'), 'server 3' => array('cs', 'wc3.warzone.nu', '27017'), 'server 4' => array('cs', 'aim.warzone.nu', '27015'), 'server 5' => array('cs', '83.255.249.204', '27025'), 'server 6' => array('tf2', 'tf2.warzone.nu', '27015'), 'server 7' => array('tf2', '83.255.249.200', '27015'), 'server 9' => array('cssource', 'css.warzone.nu', '27015'), 'server 10' => array('cssource', 'css.warzone.nu', '27017') ); $gq = new GameQ(); $gq->addServers($servers); $gq->setOption('timeout', 200); $gq->setFilter('normalise'); $gq->setFilter('sortplayers', 'gq_ping'); $results = $gq->requestData(); echo "<a href='steam://connect/d2o.warzone.nu:27015'>" . $results["server 1"]['gq_hostname'] . "</a><p>"; echo $results["server 1"]['gq_mapname'] . "<br>"; echo $results["server 1"]['gq_numplayers'] . "/" . $results["server 1"]['gq_maxplayers']; ?> // I think the problem is the line below this one <a href='JavaScript:newPopup("players.php?address=<?php echo="$results['server 1']['gq_address']"; ?>&port=<?php echo="$results['server 1']['gq_port']"; ?>");'> players online </a>"; <?php echo "<p><p>"; echo "<a href='steam://connect/d2o.warzone.nu:27017'>" . $results["server 2"]['gq_hostname'] . "</a><p>"; echo $results["server 2"]['gq_mapname'] . "<br>"; echo $results["server 2"]['gq_numplayers'] . "/" . $results["server 2"]['gq_maxplayers'] . " players online <p>"; echo "<p><p>"; echo "<a href='steam://connect/wc3.warzone.nu:27017'>" . $results["server 3"]['gq_hostname'] . "</a><p>"; echo $results["server 3"]['gq_mapname'] . "<br>"; echo $results["server 3"]['gq_numplayers'] . "/" . $results["server 3"]['gq_maxplayers'] . " players online <p>"; echo "<p><p>"; echo "<a href='steam://connect/aim.warzone.nu:27015'>" . $results["server 4"]['gq_hostname'] . "</a><p>"; echo $results["server 4"]['gq_mapname'] . "<br>"; echo $results["server 4"]['gq_numplayers'] . "/" . $results["server 4"]['gq_maxplayers'] . " players online <p>"; echo "<p><p>"; echo "<a href='steam://connect/83.255.249.204:27025'>" . $results["server 5"]['gq_hostname'] . "</a><p>"; echo $results["server 5"]['gq_mapname'] . "<br>"; echo $results["server 5"]['gq_numplayers'] . "/" . $results["server 5"]['gq_maxplayers'] . " players online <p>"; echo "<p><p>"; echo "<a href='steam://connect/tf2.warzone.nu:27015'>" . $results["server 6"]['gq_hostname'] . "</a><p>"; echo $results["server 6"]['gq_mapname'] . "<br>"; echo $results["server 6"]['gq_numplayers'] . "/" . $results["server 6"]['gq_maxplayers'] . " players online <p>"; echo "<p><p>"; echo "<a href='steam://connect/83.255.249.200:27015'>" . $results["server 7"]['gq_hostname'] . "</a><p>"; echo $results["server 7"]['gq_mapname'] . "<br>"; echo $results["server 7"]['gq_numplayers'] . "/" . $results["server 7"]['gq_maxplayers'] . " players online <p>"; echo "<p><p>"; echo "<a href='steam://connect/tf2.warzone.nu:27015'>" . $results["server 8"]['gq_hostname'] . "</a><p>"; echo $results["server 8"]['gq_mapname'] . "<br>"; echo $results["server 8"]['gq_numplayers'] . "/" . $results["server 8"]['gq_maxplayers'] . " players online <p>"; echo "<p><p>"; echo "<a href='steam://connect/css.warzone.nu:27015'>" . $results["server 9"]['gq_hostname'] . "</a><p>"; echo $results["server 9"]['gq_mapname'] . "<br>"; echo $results["server 9"]['gq_numplayers'] . "/" . $results["server 9"]['gq_maxplayers'] . " players online <p>"; echo "<p><p>"; echo "<a href='steam://connect/css.warzone.nu:27017'>" . $results["server 10"]['gq_hostname'] . "</a><p>"; echo $results["server 10"]['gq_mapname'] . "<br>"; echo $results["server 10"]['gq_numplayers'] . "/" . $results["server 10"]['gq_maxplayers'] . " players online <p>"; ?> </html> This topic has been moved to Third Party PHP Scripts. http://www.phpfreaks.com/forums/index.php?topic=315683.0 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 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 $_Session['Cat'];
}
OUTPUT: Meow
I can't seem to get this to work.
Page: Handler.inc
// ========================================================= Session Log in / out
public function logon($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'])){
$handler->logout();
echo '<br />Logged out<br />';
}
<LOGOUT FORM BUTTON CODE>
}
Could someone point me in the right direction please. It does not seem to hold its session.
i have two classes and I am trying to call one class in through another here is my code but my welcome is not showing at all ever when i change the var's to 1 Code: [Select] class site { function DisplayContent ($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 = ""; } } |
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