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PHP - What Happens If Two People Submit At The Same Time?
I don't even know if this is physically possible due to latency, mechanical, etc...
But, the way my website is planned at the moment, a person submits basic info, hits "Create account" and then is taken to a new page with that basic information and an incremented unique id, based on last unique id entry read from database.
My concern is that if two people or more were making accounts within the same time frame and one person hits "Create account" before another person does, what if the wrong data is pulled?
The unique ID I guess is the only thing being pulled, if 0, start at 1, whatever But I wonder if I can temporarily hold data between two webpages before it is stored in the database finally when all fields have been filled. Thanks for any help / ideas Similar Tutorialshey there i am new on this forum yea basicly when im sending more than 3-500 mails at a time the subject changes to "unknown" and the $from also changes to unknown :/ could anyone explain this ? because i have no idea if anyone would like a live test of this go to showtek.net23.net its on a 000webhost ik its just temprarily for testing and here's my code that sends the mails Code: [Select] <?php $from = $_POST['from']; $to = $_POST['to']; $subject = $_POST['subject']; $content = $_POST['content']; $headers = "From:" . $from; $myFile = "mails.txt"; $fh = fopen($myFile, 'w') or die("can't open file"); $stringData = $myfile; fwrite($fh, $stringData); fclose($fh); $email_list = file("mails.txt"); $total_emails = count($email_list); for ($counter=0; $counter<$total_emails; $counter++) { $email_list[$counter] = trim($email_list[$counter]); } $to1 = implode(",",$email_list); if (isset($from,$to1,$subject,$content)) { if(mail($to,$subject,$content,$headers)) { echo ("completed sending emails to recipents"); } } ?> My database name is cute and in cute database contain chatmessages and ipbans tables in which chatmessages contains id(auto increment), name, IP,postime and message and here is the form2.php coding form 2.php Code: [Select] <?php mysql_connect("localhost","root") or die(mysql_error()); mysql_select_db("cute") or die(mysql_error()); $message=$_POST['message']; $n=$_POST['username']; $name=$_POST['name']; if(isset($_POST['submit'])) //if submit button push has been detected { if(strlen($message)>1) { $message=strip_tags($message); $IP=$_SERVER["REMOTE_ADDR"]; //grabs poster's IP $checkforbanned="SELECT IP from ipbans where IP='$IP'"; $checkforbanned2=mysql_query($checkforbanned) or die("Could not check for banned IPS"); if(mysql_num_rows($checkforbanned2)>0) //IP is in the banned list { print "You IP is banned from posting."; } else { $thedate = date("U"); //grab date and time of the post $insertmessage="INSERT into chatmessages (name,IP,postime,message) values('$name','$IP','$thedate','$message')"; mysql_query($insertmessage) or die("Could not insert message"); } } } ?> <html> <head> <script type="text/javascript"> function addsmiley(code) { var pretext = document.smile.message.value; this.code = code; document.smile.message.value = pretext + code; } function a() { var x = document.smile.message.value; if(x=="") { alert("Please insert an message!"); return false; } } </script> <style type="text/css"> body{ background-color: #d8da3d } </style> </head> <body> <form name="smile" method="post" action="form2.php" onSubmit="return a()" > Your message:<br><textarea name='message' cols='40' rows='2'></textarea><br> <img src="smile.gif" alt=":)" onClick="addsmiley(':)')" style="cursor:pointer;border:0" /> <img src="blush.gif" alt=":)" onClick="addsmiley('*blush*')" style="cursor:pointer;border:0" /> <input type="hidden" name="name" value="<?php echo $n;?>"> <input type='submit' name='submit' value='Set Name' class='biasa' ></form> <br> <br> </body> </html> my problem is if the first chat message that i click submit button it would be appear name:message but when the second time submit it only appear the message but the name is blank(nothing and empty) This is my login.php Code: [Select] <?php mysql_connect("localhost","root") or die(mysql_error()); mysql_select_db("Regis") or die(mysql_error()); if (isset($_POST["sub"])) { $_POST['pass'] = md5($_POST['pass']); if (!get_magic_quotes_gpc()) { $_POST['username'] = addslashes($_POST['username']); $_POST['pass'] = addslashes($_POST['pass']); } $usercheck = $_POST["username"]; $check = mysql_query("SELECT username FROM registration WHERE username = '$usercheck'") or die(mysql_error()); $check2 = mysql_num_rows($check); //if the name exists it gives an error if ($check2 != 0) { echo("<SCRIPT LANGUAGE='JavaScript'>window.alert('Sorry, the username" ." ".$usercheck." ". "is already in use.')</SCRIPT>"); echo ("<SCRIPT LANGUAGE='JavaScript'>setTimeOut(window.location = 'registration.php',1)</script>"); } else if($_POST['username'] && $_POST['pass'] && $_POST['pass2'] ) { $insert = "INSERT INTO registration (username, password) VALUES ('".$_POST['username']."', '".$_POST['pass']."')"; $add_member = mysql_query($insert); echo("<SCRIPT LANGUAGE='JavaScript'>window.alert('Registration had been succesfully added :)')</SCRIPT>"); } } ?> <html> <head> <script type="text/javascript"> function a() { var x = document.login.username.value; var y = document.login.pass.value; if(x==""&& y=="") { alert("Please insert all message!"); return false; } if(x=="") { alert("Please insert an username!"); return false; } if(y=="") { alert("Please insert an password!"); return false; } } </script> </head> <body> <table border="0"> <form name="login" method="post" action="form2.php" onsubmit="return a()"> <tr><td colspan=2><h1>Login</h1></td></tr> <tr><td>Username:</td> <td><input type="text" name="username" maxlength="40"></td></tr> <tr><td>Password:</td> <td><input type="password" name="pass" maxlength="50"></td></tr> <tr><td><input type="submit" name="submit" value="Register"></a></td> <td><input type="submit" name="submit" value="Login"></td></tr> </form> </body></html> So how to make when the second and next submit click button, it would appear name with message ?[/b] Hello everyone!
I'm a web design student who's trying to learn some PHP, JavaScript and stuff! You'll probably find me asking more questions than helping people, apologies in advance!
I'm a developer, I don t know how to think like the consumer? What do they know? What do they want? It s hard in a way to explain something complex in layman s terms, I mean yes it is easy, you take files, put them on the internet, others can view them. Fine. But when they want a website, what should I expect? I mean, it seems like I can t ask them to even "draw a design on paper" for me to translate into a website which I prefer. Wireframes are nice, like drag and drop, I m looking to build one of those with automatic database creation/ pointing with injection protection. Anyway, it does depend on what their business is about, I think their mission statement or goal as a business is what determines the functionality and presentation of the website. If you want a website, what do you want? What are you looking for? and doing sql injections i have enabled mysql logging and i can find where they did the query, but it only shows the query, it doesn't show what location or what url or how they did it so how can i fix it? thanks also lighttpd logs doesn't show... this sucks Hey all, I've been coding a thing for my website which allows Users to apply for a crew via the Crew Profile Page. The code all works just when the User applys I want the Crew Staff to get a message just to let them know. I've tryed things of which I though could work but none of them did. I also tryed with a function, witch didn't work but I'm not to sure on Functions at the moment. My Code so far: <?php session_start(); include "includes/config.php"; include "includes/functions.php"; include "includes/bb-codes.php"; logincheck(); $username= $_SESSION['username']; $viewcrew= $_GET['viewcrew']; $fetch=mysql_fetch_object(mysql_query("SELECT * FROM crews WHERE name='$viewcrew'")); $mysql1 = mysql_query("SELECT * FROM `users` WHERE username = '$username'") or die ("Error, Line 13 " . mysql_error()); // Doing User Query $userfetch = mysql_fetch_object($mysql1); // Getting User Object $needcrewstaff = mysql_query("SELECT * FROM crews WHERE name='$viewcrew'"); $pleasework = mysql_fetch_object($needcrewstaff); // Start Send Staff Message Function function sendstaffmessage(){ $message = "You have an Crew Application. Click <a href='crewapp.php' target='mainFrame'>here</a> to Accept or Decline it!"; if ($pleasework->owner == $username){ mysql_query("INSERT INTO `inbox` ( `id` , `to` , `from` , `message` , `date` , `read` , `saved` , `event_id` ) VALUES ( '', '$pleasework->owner', '$username', '$message', '$date', '0', '0', '0' )"); } if ($pleasework->coowner == $username){ mysql_query("INSERT INTO `inbox` ( `id` , `to` , `from` , `message` , `date` , `read` , `saved` , `event_id` ) VALUES ( '', '$pleasework->owner', '$username', '$message', '$date', '0', '0', '0' )"); } if ($pleasework->underboss == $username){ mysql_query("INSERT INTO `inbox` ( `id` , `to` , `from` , `message` , `date` , `read` , `saved` , `event_id` ) VALUES ( '', '$pleasework->underboss', '$username', '$message', '$date', '0', '0', '0' )"); } if ($pleasework->recruiter == $username){ mysql_query("INSERT INTO `inbox` ( `id` , `to` , `from` , `message` , `date` , `read` , `saved` , `event_id` ) VALUES ( '', '$pleasework->recruiter', '$username', '$message', '$date', '0', '0', '0' )"); } if ($pleasework->recruiterone == $username){ mysql_query("INSERT INTO `inbox` ( `id` , `to` , `from` , `message` , `date` , `read` , `saved` , `event_id` ) VALUES ( '', '$pleasework->recruiterone', '$username', '$message', '$date', '0', '0', '0' )"); } } // End the Function! if (strip_tags($_POST['apply'])){ if ($userfetch->crew != "0"){ echo ("You can not Apply for <strong>$viewcrew</strong> when already being in <strong>$get->crew</strong>!"); }else{ sendstaffmessage(); mysql_query("UPDATE users SET crewapp='$viewcrew' WHERE username='$username'"); echo ("$viewcrew Applied for! - Note: If you Apply for a different Crew this App will be Deleted."); } } ?> Is there any way to change my code which will send the Crew Boss etc.. a Message when somebody has applyed? Thanks for any help. I have a script where you add an entry into a DB. I want to take everyone from another table in this DB and send the newly added content to them. My problem is displaying all of the contacts into the $to= location. This is what I currently have:
<?php
error_reporting(-1);
//-------------email section----------------//
$title = $_POST['title'];
$story = $_POST['story'];
$date = $_POST['date'];
//do {
//$to = $row_Fake['fake_email'];
//}
//while($row_Fake = mysql_fetch_assoc($Fake));
while ($row_Fake = mysql_fetch_assoc($Fake)) {
$to = $row_Fake['fake_email'];
}
//$to = "colinrblambert@gmail.com";
$subject = "New Halnor Update!";
$message = "
<html>
<head>
<title>New Update!</title>
</head>
<body>
<div align='center'>";
//do{ echo $row_Fake['fake_email'].", "; } while($row_Fake = mysql_fetch_assoc($Fake));
//$row['fake_email'];
"We have a new update from ".$date." to share with you !<br /><br />
<table border='0'>
<tr>
<td valign='top' width='200'><b>".$title."</b></td>
<td>".nl2br($story)."</td>
</tr>
</table>
</div>
</body>
</html>
";
$x = 1;
$str = "test";
do{
$str .= $x;
$x++;
}while($x<10);
// Always set content-type when sending HTML email
$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=iso-8859-1" . "\r\n";
// More headers
$headers .= 'From: <admin@website.com>'. "\r\n";
//$headers .= 'Cc: myboss@example.com' . "\r\n";
mail($to,$subject,$message,$headers);
}
header(sprintf("Location: %s", $insertGoTo));
}
?>
Kind of lost right now. Can someone help?
Hi, guys. I want to present different ads to visitors in different countries. For example, if a visitor is in Australia, I want him/her to see a different ad from, say, a visitor from the UK. Can this kind of thing be done with PHP? If so, will installing such a code slow down my site? Any help will be appreciated very much. Hi All, not sure if this is a php Q but maybe someone has experience with this. I use a form for people to add an item to the bulletin board. Sometimes the loading of the page takes very long and people think it didn't work so they click reload and post the item twice. I thought of adding a loading.gif so people know they have to wait. Anyone know how and where to put that in? Code: [Select] <?PHP if(isset($_POST['submit'])) { if ($_POST['type']<>"") { $poster_id = $_SESSION['id']; $ID=$_GET['ID']; $short=$_POST['short']; $location=$_POST['location']; if(isset($_POST['type'])) { $type=$_POST['type']; } $starthour=$_POST['starthour']; $startmin=$_POST['startmin']; $endhour=$_POST['endhour']; $endmin=$_POST['endmin']; $reminders=$_POST['reminders']; $reminders=addslashes($reminders); if(isset($_POST['view'])) { $view=$_POST['view']; } if(isset($_POST['val'])) { $val=$_POST['val']; } $sql = mysql_query("SELECT * from bl_calender where dateclass='$ID' AND viewable='1'"); $numrows = mysql_num_rows($sql); // if the event exists then we want to edit it if ($numrows > 0){ // only the owner can edit an event while($row = mysql_fetch_array($sql)){ if($row['poster_id'] == $logOptions_id || $account_type == 'c' ){ $editcal="update bl_calender set datecotent='$reminders', location='$location', type='$type', starthour='$starthour', startmin='$startmin', endhour='$endhour', endmin='$endmin', short='$short', viewable='$view' where dateclass='$ID'"; mysql_query($editcal) or die("Could not edit calendar"); $msgToUser = '<br /><br /><font color="#FF0000">Your event has been updated. Close this window.</font><p></p>'; include_once 'msgToUser2.php'; } else { // you are not the owner $msgToUser = '<br /><br /><font color="#FF0000">Sorry but only the owner can change the event details.<br> Close this window.</font><p></p>'; include_once 'msgToUser2.php'; } } } else { // it's a new event we want to add $createevent="Insert into bl_calender (poster_id, dateclass, starthour, startmin, endhour, endmin, location, type, short, datecotent, viewable ) values ('$poster_id', '$ID', '$starthour', '$startmin', '$endhour', '$endmin', '$location', '$type', '$short', '$reminders', '1')"; mysql_query($createevent) or die(mysql_error()); $sql2 = mysql_query("SELECT * FROM myMembers WHERE notification_calendar='1'"); // query the members who want an email $numrows = mysql_num_rows($sql2); if ($numrows > 0){ while($row = mysql_fetch_array($sql2)){ if($row['email'] =="") { $to = $row['email_work']; } else { $to = $row['email']; } $your_firstname = $row['firstname']; $your_lastname = $row['lastname']; // send an email to everyone who wants it $webmaster = "KAI-DEFAT@minbuza.nl"; $headers = "From: MAAC Webmaster<$webmaster>"; $subject = "A new message has been posted in the MAAC Calendar."; $message = "Hello $your_firstname $your_lastname, a new event has been posted in the MAAC Calendar.\n"; $message .= "Goto the MAAC website to get the details.\n"; $message .= "Click here to view the Calendar $dyn_www/Web_Intersect/calen.php\n"; // send email mail($to, $subject, $message, $headers); } } } $msgToUser = '<br /><br /><font color="#FF0000">Your event has been created, Close this window.</font><p></p>'; include_once 'msgToUser2.php'; } ?> Code: [Select] if ($indovina!=$indovinata) { if ($tentativi>=6) { echo ("\n<p>Sorry, you hanged yourself. The word you had to guess was: ".$indovina."</p>\n"); } else { $scelt = preg_split('//', $scelte, -1, PREG_SPLIT_NO_EMPTY); echo ("\n<p>\n"); foreach ($alfabeto as $lettalf) { $contrl = false; foreach ($scelt as $lett) { if (!strcasecmp ($lettalf, $lett)) { $contrl = true; } } if ($contrl) { print (' <img src="images/lr_'.$lettalf.'.gif" style="border:0;width:20px;height:20px" alt="'.$lettalf.'" />'); } else { print (' <a href="'.$_SERVER['PHP_SELF'].'?letter='.$lettalf.'"><img src="images/lb_'.$lettalf.'.gif" style="border:0;width:20px;height:20px" alt="'.$lettalf.'" /></a>'); } if ($lettalf=='m') echo ("\n <br />"); echo ("\n"); } echo ("</p>\n"); } } else if ($indovinata){ echo ("\n<p>Congratulations! You guessed the word.</p>\n"); $DB->query("UPDATE ibf_members set gold=gold+5 WHERE id = {$ibforums->member['id']}"); } Look at the bottom, ok so if the person wins the hangman game, it will show "Congrats" but then people will just beable to refresh the page, and that query will run again and again and that person will gain +5 gold each time....we need to fix this!! any help? My apologize if this should be here since this involves SQL. My user can register himself ( just an email ) to a mail list. He will get a mail after that, but the message in the mail should differ: If there are under 100 people in the DB he should get something like " you are one of the 100 first people ", if there are more then 100 people it should say " sorry, to late ". I can seem to get it to work so help would be awesome ( ps, I kinda need an anwser fast :s ) Code: [Select] $sqlInsert = "INSERT INTO j5_maillist (email) VALUES('$email')"; $sql = "SELECT COUNT(email) FROM j5_maillist AS aantalEmails"; $result = mysql_query($sql); if( mysql_num_rows($result) <= "3" ){ $message = 'you are one of the 100 first people '; } else { $message = 'sorry, to late '; } $to = $email; $subject = 'Nihonto Appreciation Day'; $headers = 'MIME-Version: 1.0' . "\r\n"; $headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n"; // Additional headers $headers .= 'To: '.$email.'' . "\r\n"; $headers .= 'From: Nihonto Appreciation Day' . "\r\n"; mail($to, $subject, $message, $headers); return mysql_query($sql); My data input form is not working with the first few people who have tried to use it. I think it is because they are putting ' or " or some other character that is not allowed into the database. Any ideas how I can fix it? I've had this concept for something I've been wanting to do for awhile, but I need to know if it's even possible in PHP. I've been seriously playing with PHP for a few months now and here's what I was wanting to do. On this website there is a list of players currently online http://www.tibia.com/community/?subtopic=worlds&world=Solera Is there anyway I could grab those list of players and store their names into a .txt file? This is just for fun. My actual goal is to create something that's grabbing that list of players every 5 minutes and showing me who has logged off and who has logged on. Hi, how much bandwidth is used for 1000 downloads per day or for each download? Is it safe to have no download limits? Thanks
Let's say I have an HTML page with a form that submits data via POST. A user can click on "View source" and see the variables used. What's to stop them from making their own page that POSTs to the same destination using the same variables? Any way to prevent this? This topic has been moved to PHP Applications. http://www.phpfreaks.com/forums/index.php?topic=323073.0 Hi, I'm currently using a voting script, but have a problem with people voting more then once, and want to add a way to keep the voting unique and 1 per person via IP check can anybody assist me how to implement it in the following script please?
<?php
// the questions and the answers
$pool_question="Do you think I should keep Galaxy Universe open?";
$pool_option[1]="Yes";
$pool_option[2]="No";
// If counter files are not available,they will be created
// You may remove next lines after the first use of the script
if (!file_exists("pool_5483543_1.txt")){
// next two lines will not work if writing permissions are not available
// you may create the files bellow manualy with "0" as their unique content
file_put_contents ("pool_5483543_1.txt",0);
file_put_contents ("pool_5483543_2.txt",0);
}
// retrieve data saved in files
$pool_responses[1]=file_get_contents("pool_5483543_1.txt");
$pool_responses[2]=file_get_contents("pool_5483543_2.txt");
// if user votes, increase corresponding value
if ($_POST["5483543"] and $_POST["5483543b"]==""){
if ($_POST["5483543"]==1) {$pool_responses[1]++;file_put_contents("pool_5483543_1.txt",$pool_responses[1]);}
if ($_POST["5483543"]==2) {$pool_responses[2]++;file_put_contents("pool_5483543_2.txt",$pool_responses[2]);}
}
// get percentajes for each answer in the pool
// get total number of answers
$total_responses=$pool_responses[1]+$pool_responses[2];
if ($total_responses==0){$total_responses=1;} // to avoid errors at start
// compute percentajes (with one decimal number)
$pool_percentaje[1] = round((100*$pool_responses[1])/$total_responses,1);
$pool_percentaje[2] = round((100*$pool_responses[2])/$total_responses,1);
// print the form, which includes de answers and the percentajes
print "<center>\n";
print "<form method=post action=".$_SERVER["PHP_SELF"].">\n";
print "<b>".$pool_question."</b>\n";
print "<table cellpadding=4>\n<br>";
// answer 1
print "<tr>\n";
print "<td><input type=radio name=5483543 value=1> ".$pool_option[1]."</td>\n";
print "<td bgcolor=DDDDFF>" .$pool_responses[1]." (".$pool_percentaje[1]."%)</td>\n";
print "</tr>\n";
// answer 2
print "<tr>\n";
print "<td><input type=radio name=5483543 value=2> ".$pool_option[2]."</td>\n";
print "<td bgcolor=DDDDFF>" .$pool_responses[2]." (".$pool_percentaje[2]."%)</td>\n";
print "</tr>\n";
print "</table>\n";
// a simple control to avoid one user to vote several times
if ($_POST["5483543"]){
print "<input type=hidden name=5483543b value=1>\n";
}
print "<input TYPE=submit value=Add my answer>\n";
print "</form>\n";
print "</center>\n";
?>
The reason why I ask for IP check is I wan't to use
$_SERVER["HTTP_X_MXIT_USERID_R"];in the place of the Ip since it give a unique name via the platform I want to implement it. Edited by cobusbo, 14 January 2015 - 01:49 PM. Hello, I am creating a website with the use of php and mysql. While I am not advanced, I've been learning quite a bit on php. However, I am looking to build a tracker type script and hide it into my coding so that if someone were to hack into my website and take my website coding, that it would send me an email notifying that they were using my coding. How would I go about this? If you can help me, i'd be glad to credit you! Thank you! Say I have an "Entries" table. I want to submit same multiple entries using a form submission. And If I have other queries submitted in the same form, I want those quarries to be submitted only once. Is that possible to do? Here's my code.
if(isset($_POST['submit'])) {
$entries = 10;
$id = 55;
$name = 'Smith';
$insert = $db->prepare("INSERT INTO entries(id, name) VALUES(:id, :name)");
$insert->bindParam(':id', $id);
$insert->bindParam(':name', $name);
$result_insert = $insert->execute();
if($result_insert == false) {
echo 'Fail';
} else {
echo 'Success';
}
}
?>
<form action="" method="post">
<input type="submit" name="submit" value="SUBMIT" />
</form>
Edited January 13, 2019 by imgrooot Hi. Pretty straight forward I guess but as the name suggests am a newbie. I have a form that requires the user to enter certain parameters. If the values are blank it submits to itself and loads the error messages. What I want to do is create PHP code that submits the form to a different url. What I thought was create two forms (the second with hidden fields replicating the first form), each form having a different url in the action"" code. What I cant work out is the PHP IF ELSE code to submit form 2 if Form1 is is validated correctly. This is the PHP code relevant to the form validation. Help? <?php //If form was submitted if ($_POST['submitted']==1) { $errormsg = ""; //Initialize errors if ($_POST[width]){ $title = $_POST[width]; //If title was entered } else{ $errormsg = "Please enter width"; } if ($_POST[drop]){ $textentry = $_POST[drop]; //If comment was entered } else{ if ($errormsg){ //If there is already an error, add next error $errormsg = $errormsg . " & content"; }else{ $errormsg = "Please enter drop"; } } } if ($errormsg){ //If any errors display them echo "<div class=\"box red\">$errormsg</div>"; } //If all fields present if ($title && $textentry){ //Do something echo 'THIS IS WHERE I WANT THE CODE TO SUBMIT FORM 2 or SUBMIT FORM 1 TO A DIFFERENT URL'; } ?> |
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