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PHP - Finding Closest Number To Given X And Given Y In The Database.
I am designing a mmorpg guild site, and decided to make a coordinate database. A user will enter their own coords, x and y, and the 10 closest coords to them will be displayed.
I need help doing this. My table is: id coordx coordy alliance region I am using $_GET to retrieve the user's input. so $_GET['mex'] $_GET['mey'] Thanks in advance for your help. Similar TutorialsHello, I currently have a .txt file with numbers, and I want PHP to display the number closest to 1000. What method would I use to go about doing this? Thanks I have build a small form that take the zip code that user enter and if is on my list will redirect to a sub domain craigslist.
I was checking all the zip codes and is pretty hard to know to what bigger city to attribute the given zip code and for that I was thinking to a simple idea to use, I am not sure how much exact will be but I think will do the trick for the moment.
The zip code range start from 00501 to 99950.
I create a array with the biggest city shown in craigslist and the zip code that correspond.
Now the tricky part, what I will do with the rest of the zip codes and my idea is to measure the distance from one to another zip code and which zip code from the array is closer from given one to take it.
<?php $zip = $_GET['zip']; $z = array ( 36830 => array ( 'auburn.craigslist.org' ), 35242 => array ( 'bham.craigslist.org' ), 36301 => array ( 'dothan.craigslist.org' ), 35630 => array ( 'shoals.craigslist.org' ), 35901 => array ( 'gadsden.craigslist.org' ) ?> Exemple: $zip= 36870 // the code received from the user 36870 - $array= ( 'auburn.craigslist.org' ), (36830 = 40) (36301 = 569) (36911 = -41) // the minus will be excluded (....etc)After checking the zip code with the ones from array, the smaller score will attribute the sub-domain correspond from the array. I hope will don t be the case when will get the same result from two zip codes:) Now I am using this rule: $zip0 = (isset($z[$zip][0]) && $z[$zip][0] != '') ? $z[$zip][0] : 'craigslist.org/about/sites#US';and I was thinking to redirect the user for a page to enter the state and the city. But I wish to make it more precises and not to involved the user so much. But if there are any other suggestions I will be glad to hear them. Hi folks, i have a complex problem (for me anyway) but i am sure with your help this can be sorted. Problem number 1: I have a simple while loop, but its only showing 4 results when i know there are 5 I am missing something very simple i know: $sql = ("SELECT * FROM postcode WHERE unid='1'")or die ('<p>There seems to be a problem, please try again soon.</p>'); $result = mysql_query($sql,$con); $row = @mysql_fetch_array($result); $i=0; while ($row = @mysql_fetch_assoc($result)){ echo "newpoints[". $i++ ."] = new Array({$row['lat']}, {$row['long']}, icon0, '{$row['postcodename']}', '{$row['postcodename']}'); \n"; } What am i missing here? Problem number 2: I have a bunch of latitude and longitude codes stored in the database. On each page there will be a varied amount of these codes used, but with a max of 20. I need to find the highest number and the lowest number of each lat and long then come up with a code that is in the middle, the idea of this is to center a map. So for example there will be an array like this: 50.852293 -1.76088 51.252938 -0.76128 51.259583 -0.727168 51.274 -0.837 51.123106 -0.970657 First i need to find the highest number of the first code (51.274) then the lowest number (50.852293) and then the highest number of the second code (-1.76088) then the lowest number (-0.727168) Then work out an inbetween code using the highest and lowest codes for each. Does anyone have a clue how to go about this? I am not the worlds best array technition or mathematician I have a row in a MySQL table called id, which auto-increments. I was wondering if anyone knows a PHP solution to find out what the highest number in the row is? I am thinking perhaps execute a MySQL query that will list the highest number, and then echo the result, like $row[id] in PHP? Hi I'm very much a newbie to PHP and am struggling with a registration and login problem. The registration part is fine - the password is emailed out fine, I check the database and the entry is there, the password is encrypted. but when the user tries to log in.... if (mysql_num_rows($result) == 0) .... it returns 0? and the access denied page is shown. I'm thinking it is something to do with the sql database encryption? I'm completely lost here and would appreciate some guidance Thanks in advance Jan Hi, I have this html code:
<div class="names dropdown">
<input type="text" class="text_form">
<ul class="dropdown-menu"></ul>
</div>
Like the title says. I have 4 of the same number in my database, but I only want my website to display one of the 4. How can I do something like this? How do I call the last ID number from a table in MySql and echo it? This is what I have so far: Code: [Select] $query = mysql_query("SELECT idnum FROM ready_aclassft"); Maybe im comeing at it all wrong. How to text a phone number in database as well as record recieved textmessages into mysql database. Any help here? i've been googling for ages. hi!, is it possible to use rand() to generate unique number that will be saved in a database as a primary key? Since i dont want to have numbers like 00001 incrementing on the table. They dont look like real account numbers... i need something like 45642 or 95452 and the like. thanks in advance. Hey guys, I m not yet an experienced coder. SO faced alot of problems. Here, I'm trying to generate a UNIQUE RANDOM NUMBER set between two numbers. Repetative occurance must be avoided by all means as I want every number so generated bears a unique value. In other words, every values that made entry into the field of my database should be differant from each others. <?php $conN=mysql_connect("localhost","root",""); if(!$conN) { die('error'.mysql_error()); } mysql_select_db("freebie_allusers",$conN); $UIN=mt_rand(1,5); $locateUIN="SELECT UIN FROM user_info WHERE UIN='".$UIN."'"; $fetchUIN=mysql_query($locateUIN); $resultUIN=mysql_num_rows($fetchUIN); if($resultUIN>0) { WHAT CODE IS REQUIRED HERE SO AS TO GENERATE UNIQUE RANDOM NUMBER? } else echo $UIN; ?> Thanx in advance I don't want to use AI, or a primary key to sort the data, as it could create some problems if the items are visited out of order, but I want to sort it always based upon a single element for speed.
I'm creating a table that will be populated (built), when it's corresponding entry doesn't exist, how do I get it sorted out if someone visits 2, then 7 before they visit 5 to read what's there? It's not a 2d number line, but a 3d number grid.
Edited by Q695, 09 September 2014 - 11:30 PM. Hi, I need to write some code for this but unsure where to start. Basically i have a database of say 10 rows. I need to be able to input a number and some sort of fair algorithm will choose one of the rows. The number will be from 6 to 10 numbers long, and will need to pick the same result each time based on that number. Its for a lotto game My current project requires me to save the number of views an image (banner ad) has appeared on users website. The problem here is that the image will be appearing on several users website and i want to be able to save the number of times it has appeared on my database. I know how to do this if the image was on the same server as the database, but not when the image and database are on completely different servers. This is somewhat like analytic where it tracks the visitors to a page. Does anyone how i can accomplish this? i figured i would need to create a JavaScript code to provide to the user so they can place it on the site but how do i get that code to connect to my database? Hello, I am using the following code to display images managed by a MySQL database. Basically another program manages a bunch of images, but this script displays certain ones (ones with INCLUDE = 1 in the database) on my main page. My question is, is there an easy way to limit the number of images it displays, say to 5? I'm not too concerned which images actually display (ascending or descending)... or better yet, random! Most importantly, I only want five to display. Each image will be linked to the full page, which displays all the images. Any ideas? Thanks! Code: [Select] <?php $username="XXXXXXX"; $password="XXXXXXX"; $database="XXXXXXX"; mysql_connect(localhost,$username,$password); @mysql_select_db($database) or die( "Unable to select database"); $query="SELECT * FROM ft_form_12 WHERE col_24='1'"; // $query="SELECT * FROM ft_form_12"; // SELECT * FROM ft_form_12 WHERE col_24='1' $result=mysql_query($query); $num=mysql_numrows($result); mysql_close(); ?> <?php $i=0; while ($i < $num) { $f20=mysql_result($result,$i,"col_23"); //Photo file name $f21=mysql_result($result,$i,"col_24"); //INCLUDE ?> <a href="http://www.domain.com/display_whole_page.shtml"><img src="http://www.domain.com/the_file/pictures/<?php echo $f20; ?>" height="50" border="0"></a> <?php $i++; } ?> I'm getting the dreaded " Invalid parameter number: number of bound variables does not match number of tokens" error and I've looked at this for days. Here is what my table looks like:
| id | int(4) | NO | PRI | NULL | auto_increment | | user_id | int(4) | NO | | NULL | | | recipient | varchar(30) | NO | | NULL | | | subject | varchar(25) | YES | | NULL | | | cc_email | varchar(30) | YES | | NULL | | | reply | varchar(20) | YES | | NULL | | | location | varchar(50) | YES | | NULL | | | stationery | varchar(40) | YES | | NULL | | | ink_color | varchar(12) | YES | | NULL | | | fontchosen | varchar(30) | YES | | NULL | | | message | varchar(500) | NO | | NULL | | | attachment | varchar(40) | YES | | NULL | | | messageDate | datetime | YES | | NULL |Here are my params:
$params = array(
':user_id' => $userid,
':recipient' => $this->message_vars['recipient'],
':subject' => $this->message_vars['subject'],
':cc_email' => $this->message_vars['cc_email'],
':reply' => $this->message_vars['reply'],
':location' => $this->message_vars['location'],
':stationery' => $this->message_vars['stationery'],
':ink_color' => $this->message_vars['ink_color'],
':fontchosen' => $this->message_vars['fontchosen'],
':message' => $messageInput,
':attachment' => $this->message_vars['attachment'],
':messageDate' => $date );
Here is my sql:
$sql = "INSERT INTO messages (user_id,recipient, subject, cc_email, reply, location,stationery, ink_color, fontchosen, message,attachment) VALUES( $userid, :recipient, :subject, :cc_email, :reply, :location, :stationery, :ink_color, :fontchosen, $messageInput, :attachment, $date);";
And lastly, here is how I am calling it:
$dbh = parent::$dbh;
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
if (empty($dbh)) return false;
$stmt = $dbh->prepare($sql);
$stmt->execute($params) or die(print_r($stmt->errorInfo(), true));
if (!$stmt) { print_r($dbh->errorInfo()); }
I know my userid is valid and and the date is set above (I've echo'd these out to make sure). Since the id is auto_increment, I do not put that in my sql (though I've tried that too), nor in my params (tried that too). What am I missing? I feel certain it is something small, but I have spent days checking commas, semi-colons and spelling. Can anyone see what I'm doing wrong?
Hello, I'm new! I am trying to populate a list of locations based on ratings. I can populate the list just fine but it's displaying every record in the table. Is there a way of only looping 4 times so as to just display the top 4 records? Here's the code: Code: [Select] $result = mysql_query("SELECT * FROM locations ORDER BY rating DESC"); while($row = mysql_fetch_array($result)) { echo $row['name']; echo "<br>; } Thankyou in advance for any help This topic has been moved to MySQL Help. http://www.phpfreaks.com/forums/index.php?topic=334480.0 What I have so far is a page that produces a list of usernames with checkboxes next to them. From the usernames that I check, I want to update a field for each of those users. My problem is that the number of checkboxes I check is not going to be static so I am pretty sure I have to run a loop based on the number of checked checkboxes ("People chosen"). Here is what I have so far: Code: [Select] <?php if (isset($_POST['submit1'])) { $pick = $_POST["pick"]; $how_many = count($pick); echo 'People chosen: '.$how_many.'<br><br>'; echo "<br><br>"; $count = 0; while ($count < $how_many) { //mysql code probably should go here but I am stuck $count++; } } else { $gender = mysql_real_escape_string($_POST['Gender']); $limit = mysql_real_escape_string($_POST['limit']); echo $gender; echo "<br />"; $count = 0; if ($gender == 'Male') { $result = mysql_query("SELECT * FROM users WHERE gender =\"1\" LIMIT 0, $limit", $connection); if (!$result) { die("Database query failed: " . mysql_error()); } ?> <form method="post"> <?php while ($row = mysql_fetch_array($result)) { ?> <input name="pick[]" type="checkbox" value="<?php echo $row['username'] ?>"><?php echo $row['username'];?> <br /> <?php } ?> <input type="submit" name="submit1" value="Make Offer" /> </form> <?php } ?> I hope this makes sense. Any help would be greatly appreciated. I need a way to generate a random number and insert into a database, and I need the database to not contain any duplicates of that number. I basically need to generate a RMA # (Return Merchandise Authorization Number), so the numbers absolutely CAN NOT be duplicate. I have no ideas how to go about this. Should I generate a random number, search the database and see if there's a duplicate, and if there is re-run the script? |
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