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PHP - Need To Global Variables To Work In Functions.
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. Similar TutorialsI 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? 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 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? } 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 $sess_save_path then pass it up to the next function that may need it perhaps? I just don't want to use globals if I can avoid it, been working out a system that work use for some old solution we use and it uses globals and it really bugs the living life out of me, why people are so lazy they can't avoid them at all costs grrr. Any advice generally speaking is of great appreciation, Jeremy. If I want to load some user information from the database into an object/array and share it throughout my application, what's the best approach for this? Here is what I thought of doing: - I can call a function (e.g user_info() ) that will return the user information whenever I need it , but It'll have to run a DB query each time I call it. - Load user information once from the DB, assign it into a global array/object, then call that object whenever I need it. A lot of people recommended against using global variables, but I think performance wise it's better than running a query each time. Are there any better alternatives than the above approaches? I need the following three variables to be available globally, that is to every page. (An common header.html uses them at every page). Please teach me how to initialize them. (inside the header.html maybe?) 'U_M_CODE' => append_sid("{$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. $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 $errors++ within the function it doesn't increment outside the function's scope. even though I declare it as a global at the start of the function. I know I'm doing something stupid here but can somebody please tell me what it is? Thanks Hello I've have read that global variables should not be used. so if i have 2 .php files: index.php - main content php file sitefunctions.php - php functions site file on my index.php page i have the following (an example of my problem): <?php displayError($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 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 <?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 $foobar is '' So I don't really understand what's happening and why it's not working. I have a database that holds a list of companies. the database includes and ID, and name of each company. Now when an articles gets submitted to my site it can then be related to company. We a relate a company to an article its related through its ID. What I want to do is create a function that would let me easly convert my company ID into company name within having to write out the queries over and over again in my code. Only problem is I can't get it to work. I have two files, index.php and functions.php. functions.php Code: [Select] function cname($pubid) { global $db; $company= $db->query("SELECT * FROM my_database WHERE id='$pubid'") or die(mysql_error()); while($company= $db->fetch_array($company)) { $cname = $company['name']; } return $cname; } and within index.php I put Code: [Select] echo cname($companyID); Now, when I first looked at index.php I was getting an error. I know it had something to do with me using my variables within the function and after some searching I ended up getting rid of the error by adding "global $db;" to my code. Please note that I include functions.php at the top of index.php. What am I doing wrong and why wont it work? HELP PLEASE! also note that my i've rechecked and all the database info is correct and names spelt right. Just dont know what else to do. I have a little problem. I have made a script(function) to connect to the database. this is the script: connect(php) Code: [Select] <?php $server = "localhost"; $username = "username"; $password = "password"; function connectdatabase($type,$database) { if($type == "mysql") { $mysql = mysql_connect($server, $username, $password); mysql_select_db($database, $mysql); } else if($type == "mysqli") { $mysqli = new mysqli($server, $username, $password, $database); } else if($type == "mssql") { $mssql = mssql_connect($server, $username, $password); mssql_select_db($database, $mssql); } function query($query) { if($type == "mysql") { mysql_query($query); } else if($type == "mysqli") { $mysqli->query($query); } else if($type == "mssql") { mssql_query($query); } } } ?> and aanmelden(php) Code: [Select] <?php include("config.php"); connectdatabase("mysql", "[ledensysteem]"); //example if(!empty($_POST)) { if(!preg_match('/^[A-Za-z1-9-]{'.$Minimale_Gebruikersnaam_Karakters.',}$/', $_POST['gebruikersnaam'])) { if(!isset($error)){ $error=1;}else{$error=$error+1;} echo "Je gebruikersnaam moet minimaal {$Minimale_Gebruikersnaam_Karakters} tekens bevaten en mag geen komma of andere onbedoelde tekens zijn<br>Toegestaan is <br>A t/m Z <br>a t/m z <br>1 t/m 9 <br>en -"; } else { echo "geldige gebruikersnaam(goedgekeurd)"; } if(preg_match('/^[A-Za-z1-9-]{'.$Minimale_Wachtwoord_Karakters.',}$/', $_POST['wachtwoord']) && preg_match('/^[A-Za-z1-9-]{'.$Minimale_Wachtwoord_Karakters.',}$/', $_POST['herhaalwachtwoord'])) { if($_POST['wachtwoord'] != $_POST['herhaalwachtwoord']) { if(!isset($error)){ $error=1;}else{$error=$error+1;} echo "niet hetzelfde wachtwoord"; } /*else { echo "hetzelfde wachtwoord (goedgekeurd)"; }*/ } else { if(!isset($error)){ $error=1;}else{$error=$error+1;} echo "wachtwoord moet minimaal {$Minimale_Wachtwoord_Karakters} tekens bevatten!"; } if(!preg_match("/^[A-Za-z1-9_.-]{1,}@[A-Za-z1-9-]{1,}\.[A-Za-z1-9]{2,3}$/", $_POST['email'])) { if(!isset($error)){ $error=1;}else{$error=$error+1;} echo "onjuiste email"; } else { echo "goedgekeurd!"; } if(!isset($error)) // this problem is fixed yesterday on phpfreaks.com forum! { echo "goedgedaan geen errors!"; query("SELECT username FROM phpfreaks WHERE password = private"); // example } } else { ?> <HTML> <HEAD> <TITLE>New Document</TITLE> </HEAD> <BODY> <form method="post"> <input type="text" name="gebruikersnaam" value="gebruikersnaam" maxlength="20" size="20"> <input type="password" name="wachtwoord" value="wachtwoord" maxlength="20" size="20"> <input type="password" name="herhaalwachtwoord" value="herhaalwachtwoord" maxlength="20" size="20"> <input type="text" name="email" value="voorbeeld@domeinnaam.extensie" maxlength="50" size="20"> <input type="submit" name="login" value="inloggen"> </form> </BODY> </HTML> <?php } ?> the problem is, is that i want to pass a variable between functions like $type (the database type) between connectdatabase(); and query(); in the 'aanmelden.php' file is an example of how i use the function (on line 3 and 45 the ones with //example comment) thanks for reading. please help. ps. config.php contains include("connect.php"); I have this function: Code: [Select] function echo_exist($pre1,$ee,$post1) { if ($ee!='') { return $pre1; return $ee; return $post1; } else { //do nothing } } But when I try to echo it Code: [Select] echo_exist("(","$row['payment_type']",")"); I get syntax error, unexpected T_ENCAPSED_AND_WHITESPACE If $row['payment_type'] exists, I want it to be displayed in parentheses like: (AUTO) I suspect it has to do with my ' characters for the associative array, but I am new with functions so perhaps it is the multiple arguments that are wrong? Still working on my project, and i have been learning a lot here! Thank you so much. But as you may have guessed, i still have problems. User registration is working, and new users are put in the database with a rank of 0. This means they can't do anything. (can there be trouble with this. I mean, a rank of "0"?) An admin needs to give access to these accounts, but that is where it becomes difficult. The following code is showing the new accounts to the admin. Code: [Select] <?php include("navbar.php"); if ($admin<2) //normal guy or not { die ("Du har ikke rettigheder til at se denne side!"); } else if(isset($_POST['submit'])) { //code to make the user able to use stuff } { $connect = mysql_connect("localhost","root",""); mysql_select_db("eksamen - phoenix"); $query = mysql_query("SELECT * FROM users WHERE rank='0'"); ?> <form action='admin.php' method='POST'> <table> <?php while($row = mysql_fetch_assoc($query)) { echo " <tr> <td> ".$row['username']." </td> <td> ".$row['email']." </td> <td> ".$row['real_name']." </td> <td> <input type=\"checkbox\" name=".$row['username']." value=\"Godkend\"> </td> </tr> ";} ?> <tr> <td> <input type='submit' name='submit' value='Register'> </td> </tr> </table> </form> <?php } ?> As you may see, there is a lot of turning php on and off. I made it work this way, but i guess there is nothing wrong with it. The problem is that the username is not stored, so i can connect to the database and change the "rank" value. Changing that value should be easy, but storing the username is as easy as i thought. Any ideas? I've written the following code: Code: [Select] $mode = 'development'; // 'Development' or 'Public' // Writes a buffer to a file /** * ob_file_callback() * Writes the generated CSS to a file. * @param mixed $buffer * @return void */ function ob_file_callback($buffer) { // stylesheet-public.css is the output generated file $ob_file = fopen('stylesheet-' . $mode . '.css','w'); fwrite($ob_file, $buffer); } $buffer = 'test'; ob_start('ob_file_callback'); $mode is always empty when I run this code. Is it an issue because ob_file_callback is an overridden function? I think I need to use $this, but I need to be able to add the two values returned from both of my functions. How would I do that? Code: [Select] public function get_users_edge($uid) { $users_primary->get_users_primary_edge($uid); $users_dynamic->get_users_dynamic_edge($uid); echo $users_primary + $users_dynamic; } Learning something new here so if anyone can tell me why I this wont return a value? page1.php Code: [Select] <?php require "page2.php"; getuserid(); echo $userID; ?> page2.php Code: [Select] <?php function getuserid() { $user =& JFactory::getUser(); $userID = $user->id; global $userID; } ?> I have some questions about the scope of navigation : if i define a constant like define('constant'), php manuel says it's global, does this mean that i can use of different files also? like, i defined in define.php and used in anotherfile.php, or shoud the latter file be included then? what about file a.php includes file b.php which in turn includes file c.php. Can functions of a use variables of file c? ultimately: what about variables that are declared global inside a function but this variables is not initialized in that script, like in wordpress: function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) { global $wp_locale; // more code } $wp_locale can be initialized in another script file? thanks in advance |
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