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PHP - Php + Mysql Query Queue
Hey Guys, I have the following problem.
I have a lot of users sending querys to my DB at the same time, and for example each time a user sends the query, a field with a number increases. Sometimes that number increases like this: 10.11, 10.12, 10.13, 10.15, 10.14 When it obviously should be: 10.11, 10.12, 10.13, 10.14, 10.15 Maybe (in this example) the query from 10.15 finished first (got inserted on DB) than the query from 10.14. My question is if there is some kind of function or line of code to have some kind of queue between the Querys...so if a query that is received first must finish and the the next can go ahead and query. Hope I am making myself clear, Looking forward any kind of help and/or suggestions. Thanks a lot in advance! Similar TutorialsHere is my code: // Start MySQL Query for Records $query = "SELECT codes_update_no_join_1b" . "SET orig_code_1 = new_code_1, orig_code_2 = new_code_2" . "WHERE concat(orig_code_1, orig_code_2) = concat(old_code_1, old_code_2)"; $results = mysql_query($query) or die(mysql_error()); // End MySQL Query for Records This query runs perfectly fine when run direct as SQL in phpMyAdmin, but throws this error when running in my script??? Why is this??? Code: [Select] You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '= new_code_1, orig_code_2 = new_code_2WHERE concat(orig_code_1, orig_c' at line 1 If you also have any feedback on my code, please do tell me. I wish to improve my coding base. Basically when you fill out the register form, it will check for data, then execute the insert query. But for some reason, the query will NOT insert into the database. In the following code below, I left out the field ID. Doesn't work with it anyways, and I'm not sure it makes a difference. Code: Code: [Select] mysql_query("INSERT INTO servers (username, password, name, type, description, ip, votes, beta) VALUES ($username, $password, $name, $server_type, $description, $ip, 0, 1)"); Full code: Code: [Select] <?php include_once("includes/config.php"); ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title><? $title; ?></title> <meta http-equiv="Content-Language" content="English" /> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <link rel="stylesheet" type="text/css" href="style.css" media="screen" /> </head> <body> <div id="wrap"> <div id="header"> <h1><? $title; ?></h1> <h2><? $description; ?></h2> </div> <? include_once("includes/navigation.php"); ?> <div id="content"> <div id="right"> <h2>Create</h2> <div id="artlicles"> <?php if(!$_SESSION['user']) { $username = mysql_real_escape_string($_POST['username']); $password = mysql_real_escape_string($_POST['password']); $name = mysql_real_escape_string($_POST['name']); $server_type = mysql_real_escape_string($_POST['type']); $description = mysql_real_escape_string($_POST['description']); if(!$username || !$password || !$server_type || !$description || !$name) { echo "Note: Descriptions allow HTML. Any abuse of this will result in an IP and account ban. No warnings!<br/>All forms are required to be filled out.<br><form action='create.php' method='POST'><table><tr><td>Username</td><td><input type='text' name='username'></td></tr><tr><td>Password</td><td><input type='password' name='password'></td></tr>"; echo "<tr><td>Sever Name</td><td><input type='text' name='name' maxlength='35'></td></tr><tr><td>Type of Server</td><td><select name='type'> <option value='Any'>Any</option> <option value='PvP'>PvP</option> <option value='Creative'>Creative</option> <option value='Survival'>Survival</option> <option value='Roleplay'>RolePlay</option> </select></td></tr> <tr><td>Description</td><td><textarea maxlength='1500' rows='18' cols='40' name='description'></textarea></td></tr>"; echo "<tr><td>Submit</td><td><input type='submit'></td></tr></table></form>"; } elseif(strlen($password) < 8) { echo "Password needs to be higher than 8 characters!"; } elseif(strlen($username) > 13) { echo "Username can't be greater than 13 characters!"; } else { $check1 = mysql_query("SELECT username,name FROM servers WHERE username = '$username' OR name = '$name' LIMIT 1"); if(mysql_num_rows($check1) < 0) { echo "Sorry, there is already an account with this username and/or server name!"; } else { $ip = $_SERVER['REMOTE_ADDR']; mysql_query("INSERT INTO servers (username, password, name, type, description, ip, votes, beta) VALUES ($username, $password, $name, $server_type, $description, $ip, 0, 1)"); echo "Server has been succesfully created!"; } } } else { echo "You are currently logged in!"; } ?> </div> </div> <div style="clear: both;"> </div> </div> <div id="footer"> <a href="http://www.templatesold.com/" target="_blank">Website Templates</a> by <a href="http://www.free-css-templates.com/" target="_blank">Free CSS Templates</a> - Site Copyright MCTop </div> </div> </body> </html> Hi to all the members of this great community, This is my first post here and I am new in PHP and in general web programming, my background is in C and C++ programming languages that's why I want to make some comments with regards to PHP and getting your feedbacks. In C++ one exercise considered that someone knows the basics of the language is to implement a general dynamic queue that is the client programmer can put an arbitrary number of objects into a queue and using templates you can instantiate different queues holding different kind of objects. I have grasped the most important parts of the language and I am pondering if you can effectively implement something like the above using PHP. I have googled this, and I have seen so far just a very simple implementation in PHP. He has defined his queue using an array having a fixed size and he just moved an index up and down through the array while inserting and poping elements from the queue. if you want to implement a dynamic queue the only way it comes to my mind just off the top of my head is to use the the construct [] to add dynamically element at the end of the queue and when you want to pop up an element you just have to unset(your current queue which is an array) create another array (smaller by one element than the previous one) copy the elements at the appropriate positions I just wanted, people with a C++ programming experience to give me some feedback about this topic and to give me some basic idea how could we implement a general queue in PHP. For example could we implement a queue w/o using an array? I would appreciate any comment. Greetings from Greece Hi folks, I'm trying do a system like a queue, but doesn't work like i expected. OS: Windows (IIS) PHP: 5.2 So, let me tell you, what i'm doing. 1º Click in one button and insert the entry into database $stmt = odbc_prepare($conn, 'INSERT INTO queue (ask_date, run_date, executed, user_id) VALUES (GETDATE(), NULL, 0, ?)'); 2º After that i will run a script to check values executed = 0
$handle = new COM('WScript.Shell');
$handle->Run("php generate.php", 0, false);
3º Check values executed = 0 and update de column executed to 1 (generate.php)
$sql = "SELECT * FROM queue WHERE executed=0;";
$rsQueue = odbc_exec($conn, $sql);
while (odbc_fetch_row($rsQueue )) {
//code here
}
My problem is, when i click in button it will open always new process (php.exe). (2 clicks - 2 processes; 3 clicks - 3 processes; etc..) My ideia is, first button click execute the script (2º) but the other times if script is running, only add the content to queue table to be executed in current process. Someone have any ideia? Thank you! Hi all I am having a nightmare coming up with something and I wonder if I could pick everyones brain. I am helping to setup a mini web system for a friends dads work, the server is held internally on a very old machine, the current system runs ok and I am just helping to add some new things in. One of the functions they have is a "job" tool, which allows people to submit a small form of data about the job they are currently doing, this is used by internal and external staff. There network is really old and slow as well as the server the scripts are on, and they have no money at the moment to upgrade it, one of the reasons for these enhancements is so they can free up some money, so i'm doing my best to help them. The problem I am having is that when more than 150 users are submitting the form at the same time, the PHP pages are just timing out and the user has to go back to stage 1, their peak has been 230 users, which caused everyone a problem. So I wonder, is there anyway to create a queue style system with a countdown timer? So for example, when the user logs in, if there are more than 60 active users currently submitting on that form, then it would place that user in a queue for X number of seconds\minutes, then when one of those 60 users finish with the form or their 10 minutes is up, the user logged in is then forwarded to the form allowing them to complete it. I was going to give each user a maximum of 10 mins to complete the form before they are chucked out the queue, if that's possible. I was thinking about maybe logging them into a new bigger server online, then when number of user sessions drops below 60 on the current internal server, then they are forward to it, which allows them to complete the form, so you only ever have 60 users on the internal server at once. But I have 0 clue where to start. Is this a totally custom hard job? Or is there something anyone can point me to? Thanks very much all Johnny boy I'm restarting this under a new subject b/c I learned some things after I initially posted and the subject heading is no longer accurate. What would cause this behavior - when I populate session vars from a MYSQL query, they stick, if I populate them from an MSSQL query, they drop. It doesn't matter if I get to the next page using a header redirect or a form submit. I have two session vars I'm loading from a MYSQL query and they remain, the two loaded from MSSQL disappear. I have confirmed that all four session vars are loading ok initially and I can echo them out to the page, but when the application moves to next page via redirect or form submit, the two vars loaded from MSSQL are empty. Any ideas? Hi. I am sending out email with a php script - about 5000 at a time by send 15 or so every 20 seconds which works fine. Sometimes I need to add an attachemnt. I then find that the script will keep stalling. Is there a way to test the server qmail/mail queue to see if it isready to send another message? - rather than send it and have the script stall? It may be enough to simply be able to check that the number of messages left to be sent in the queue? Have search a lot for help on this with no results. Any server/qmail experts out there? Thanks Paul Hello! First post. I am trying to code out a news website (kinda) I can't seem to fetch the news articles out of SQL. What am I doing wrong? (start is fetched by $_REQUEST. Assume it is 1) $end=$start+5; $stories = mysql_query("SELECT * FROM 'stories' DESC ORDER BY id LIMIT $start, $end"); $num = mysql_num_rows($stories); print $num; I have a query which when I run in phpmyadmin it returns the results I want. When I put it into PHP I get no results can someone tell me what I'm doing wrong? Code: [Select] <?php include("config.php"); ?> <?php // sending query $sql = mysql_query("SELECT dayname((date(FROM_UNIXTIME(dateline)))) as 'Day Of Week', date((date(FROM_UNIXTIME(dateline)))) as 'Date', count(*) as 'Number of Opened Tickets', ( select count(ticketmaskid) from swtickets where date(FROM_UNIXTIME(swtickets.lastactivity)) = Date and isresolved=1 ) as 'Number of Closed Tickets' from swtickets where ((date(FROM_UNIXTIME(dateline)) between (DATE_SUB(CURDATE(), INTERVAL (IF(DAYOFWEEK(CURDATE())=1, 9, DAYOFWEEK(CURDATE()))) DAY)) and (DATE_ADD(CURDATE(), INTERVAL (6 - IF(DAYOFWEEK(CURDATE())=1, 8, DAYOFWEEK(CURDATE()))) DAY)) )) group by date(FROM_UNIXTIME(dateline))"); ?> <?php echo $sql; ?> All it returns is: Resource id #4 When in phpmyadmin I get: Hello, I have a query where i try to search, but i want to put a limitation, but it doesn't seems to be working :/ Here's my code: $result = mysql_query("SELECT * FROM clients WHERE staff = 0 AND username LIKE '%" . $keyword . "%' OR company LIKE '%" . $keyword . "%' ORcontact LIKE '%" . $keyword . "%' OR address LIKE '%" . $keyword . "%' OR email LIKE '%" . $keyword . "%' OR phone LIKE '%" . $keyword . "%' ORDER BY phone"); Alright, so i basically want the user to search in all of those fields, however i want it to filter all "staff" members, so it should only view the "0" ones, meaning the clients, only problem that when i run this, all clients gets displayed, also the staff accounts. Any suggestion? I have 2 tables (see code below) (1) "tbl_users" has all users info, including "user_alias" (VARCHAR) and "user_id" (INT and PRIMARY KEY) (2) "tbl_projects" has all project info, including "project_client" (INT) which i linked to "user_id" from "tbl_users" and displays "user_alias" Code: [Select] CREATE TABLE `tbl_users` ( `user_id` int(11) NOT NULL auto_increment, `user_first` varchar(25) NOT NULL, `user_last` varchar(25) NOT NULL, `user_email` varchar(35) NOT NULL, `user_pw` varchar(12) NOT NULL, `user_role` int(1) NOT NULL, `user_alias` varchar(35) NOT NULL, PRIMARY KEY (`user_id`) ) CREATE TABLE `tbl_projects` ( `project_id` int(11) NOT NULL auto_increment, `project_client` int(1) NOT NULL, PRIMARY KEY (`project_id`) ) So... I managed to display all users and all projects but I want to show all users with ONLY their projects assigned. I mean, when I click on a user, I want to see his or hers contact info and all the projects that specific user is linked to. For instance, i might have project 1, project 2, project 3 and project 4. Project 1, 2 and 4 are linked to user 1 so when i click on user 1 i see projects 1, 2 and 3 (not 4). Code: [Select] <?php require_once('config.php'); mysql_select_db($database, $makeconnection); //this displays all projects $sql_get_projects="SELECT * FROM tbl_projects ORDER BY project_id ASC"; $get_projects = mysql_query($sql_get_projects, $makeconnection) or die(mysql_error()); $row_get_roles = mysql_fetch_assoc($get_projects); $totalRows_get_projects = mysql_num_rows($get_projects); //this displays all users $sql_find_users = "SELECT * FROM tbl_users WHERE user_id = $user_id"; $find_users = mysql_query($sql_find_users, $makeconnection) or die(mysql_error()); $row_get_users = mysql_fetch_assoc($find_users); $totalRows = mysql_num_rows($find_users); ?> Any help would be great!! Hi there, I am executing this query in the code below, it executes as I want it except when it gets the title, it doesnt get the title for that row it just gets it from the first row in the table... if that makes sense... what is going on? Code: [Select] <?php require'styles/top.php'; ?> <br> <center><table border='0' width='100%' style='text-align:center; font-weight:bold;'> <tr> <td width='33%'>Subject</td> <td width='33%'>From</td> <td width='33%'>Date</td> </tr> </table></center> <br> <?php $query = mysql_query("SELECT * FROM messages WHERE to_user='$username' ORDER BY message_id DESC") or trigger_error('Error: ' . mysql_error()); $numrows = mysql_num_rows($query); if ($numrows > 0){ while ($row = mysql_fetch_assoc($query)){ $id = $row['message_id']; $from = $row['from_user']; $to = $row['to_user']; $title - $row['message_title']; $content = nl2br($row['message_content']); $date = $row['date']; echo"<center><table border='0' width='100%' style='text-align:center; font-weight:bold;'> <tr> <td width='33%'>$title</td> <td width='33%'>$from</td> <td width='33%'>$date</td> </tr> </table></center> <br>"; } } else echo ''; ?> </div> <div id='left'> </div> <div id='right'> </div> I have this query that searches the database based on what the user inputed. However i'm having the following issues with it: The query is supposed to look for the name of a city in a database table that stores the city names along with their state and country CITY STATE COUNTRY Now i have an input field where the user can search a location and it searches the location from the database. When they search the database the input is in the following format: city, state, country I then use the following script to separate them into three fields Code: [Select] $split = explode(',', $location); // $location being the city, state, country $city = $split[0]; $state = $split[1]; $country = $split[2]; Then i use this MySql Query to search the fields to make sure the city and country match Code: [Select] $get_location = mysql_query("SELECT * FROM locations WHERE name LIKE '$city' AND country LIKE '$country'") or die(mysql_error()); $tmp_loc = mysql_fetch_assoc($get_location); This is where the problem beings...if i use "AND" to search both fields i get no results even though there are results in there however if i change it to an "OR" statement it finds teh locations however it doesn't do an accurate search... for example someone searches for Toledo, Ohio, United States, the user will get Toledo, Spain instead of the right Toledo, since Toled, Spain is at the top of the table I've been trying to get this but i can't get this to work at all every time i use AND it gives me no results I hope someone here can check help me out I am creating a site that has to display 36 images on the screen. The image name is stored in the database. My problem is if I have less than 36 images stored I need to display a default image. here is my current query $sql="SELECT col_image, col_url from tbl_images WHERE col_active='1' and col_bigimage='0' ORDER BY RAND() limit 36"; so If I only have 20 active images. I need to display 16 default images. I hope this makes sense. Bill Hi all, I have a database with 2 tables, 'users' and 'battles'. The site pulls 2 random peoples pictures and lets the user choose who they think would win the battle. So if user1 is using the site it might show pictures for user5 and user3. If the user1 chooses that user5 wins then an entry is made into the 'battles' table like this : voter win lose user1 user5 user3 Any ideas what query I can use so it only shows 2 people that the user hasnt compared before ? As if its doing this : choose 2 id's from 'users' that user1 hasnt compared before Hope that makes sense. Many thanks, Scott I have the following MYSQL Query: Basically, the query will not work when i add quotes to the string. I want it to select from e-mails database where subject LIKE '%"$stringservername"%' If I do just '%$SERVERNAME%' it works :S - And the mysql data includes the quotes. I use the $strongservername to add the quotes. $stringservername = ""$servername""; $stringjobname = ""$vjobname""; $queryemails = mysql_query("SELECT * FROM `emails` WHERE `subject` like '$searchstatus' AND `subject` like '%$stringservername%' AND `subject` like '%$stringjobname%' AND `fromemail` = '$matchfrom'"); Any suggestions? Thankyou $loc="SELECT * FROM table WHERE username='a', id='1' AND uin='123'"; $get=myspl_query($loc) or die(mysql_error()); Please somone tell me the right command as how to use multiple AND in mysql query. Thanks Hi, Relative newbie here pulling his hair out! I've just started to attempt to build a stock control system for my parent's business and am having problems. I'm building a (what I though) simple page that will just return all the info from a table. Each stock item has it's own stock code (5 characters) and also a barcode. There may be more than one barcode assigned to each stock item so I created a seperate table with just two fields - barcode and stockcode - the barcode obviously has to be unique but the stockcode doesn't. The way I have done it is with a form where you can enter the stock code - this then becomes $STOCKCODE and the rest of the page displays the result for that code - so far so good. Now I want it to see if the data entered into the form is greater than 5 characters. If it is it will then assume that you have entered a barcode and look for the stockcode from the other table and assign that to $STOCKCODE instead. The code below is the part that isn't working. Entering a stock code brings up the correct result, but enter a barcode and it just returns an incorrect product (always the same incorrect product irrespective of what you type in). Executing the barcode lookup query directly in mysql on it's own works and generates the correct stock code but there's something awry in the way I've done it that I can't seem to work out. The "echo "not recognised" at the end doesn't work either. Googling the problem had just confused me even more! Any help would be appreciated! Cheers Code: [Select] //retrieve form result $getcode=$_POST['item_entry']; //Count characters in form result $num_char=strlen($getcode); //barcode lookup query $result = mysql_query("SELECT barcode.SKU FROM barcode WHERE $getcode = 'barcode.BARCODE'"); //se if the entered data was a stockcode or a barcode if ($num_char == 5) {$STOCKCODE=$getcode;} elseif ($num_char > 5) {$STOCKCODE=mysql_fetch_assoc($result);} else echo "not recognised"; Hello... First I should explain what is wrong. I have a database with a table called subs... Within this table I have a unique field called ID, then a fields called member, date(unix timestamp) amount, month, year... HOWEVER for each month and year there is several entries all with different date stamps. How can I extract the entry with the most recent date??? However there is a catch. I want to view payments made since a certain date but only one per month... Below is my code... I thnk I need to add or change something slightly but i am fairly new to PHP and am totally stuck... MANY THANKS IN ADVANCE!!! Code: [Select] [php]$query="SELECT * FROM records WHERE section='B' OR section='C' OR section='S' order by section, surname"; $result=mysql_query($query); for ($row=0;$row<mysql_num_rows($result);$row++){ $forename=mysql_result($result,$row,'forename'); $surname=mysql_result($result,$row,'surname'); $id=mysql_result($result,$row,'id'); $ref="19nx".$id.substr($forename,0,2).substr($surname,0,2); $section=mysql_result($result,$row,'section'); $giftAid=mysql_result($result,$row,'giftAid'); if ($giftAid>1){$day=date('d',$giftAid);$month=date('m',$giftAid);$year=date('y',$giftAid);}else{$day="";$month="";$year="";} $giftAidName=mysql_result($result,$row,'giftAidName'); $giftAidComment=mysql_result($result,$row,'giftAidComment'); $subdate=mktime(0,0,0,$submonth,$subday,$subyear); $query="SELECT * FROM subs WHERE member='$id' AND date>$subdate Order BY id DESC"; $subResult=mysql_query($query); $subs=""; for($ss=0;$ss<mysql_num_rows($subResult);$ss++){ $amount=mysql_result($subResult,$ss,'amount'); if ($amount==""){$amount='25';} $date=date("M/Y",mysql_result($subResult,$ss,'date')); $subs=$subs."<a title='$date' alt='$date'>$amount</a>,"; }[/php] This outputs a line of results which is right except it shows 2 or 3 for april, 3 or 4 for may anthoer 2 or 3 for june etc... I hope someone gets my drift! |
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