PHP - Trying To Figure Out How To Limit Variable Size To Limit User Input

Hi guys, with code below i can upload pictures to database, however i need to limit the file upload. I have this code done with help of php freak forum and i am  a newbie so can u help me please? thanks in advance


if (isset($_POST['register']) && $_POST['register']){
//image1
$nameone=$_FILES['myfileone']['name'];
if ($nameone)

{
$dst_filename = resize_upload_image($_FILES['myfileone'], "images/");
if ($dst_filename !== false) {
extract($dst_filename);
$image1 = mysql_query ("INSERT INTO img SET image='$img_filename', thumb='$thumb_filename', refimage='$reference'");
}
}
}
?>
<form action='' method='POST' enctype='multipart/form-data'>
<p>File:
      <input type='file' name='myfileone'>

I'm trying to add a file size limit to my upload form-code (below)

Hi How can limit only required input fields cannot be empty.

<form name="test" method="post" action="test.php">
<label for="quest">
  <input type="text" name="quest" />  <!-- REQUIRED -->
</label>
<label for="answers">
  <input type="text" name="answers[]" /> <!-- REQUIRED -->
</label>
<label for="answers">
  <input type="text" name="answers[]" /> <!-- REQUIRED -->
</label>
<label for="answers">
  <input type="text" name="answers[]" />
</label>
<label for="answers">
  <input type="text" name="answers[]" />
</label>
<label for="answers">
  <input type="text" name="answers[]" />
</label>

<label for="submit">
  <input type="submit" name="submit" value="Submit" />
</label>
</form>

Following function working only on all empty input fields, i need help to enable button when required fields is not empty.

$(document).ready(function() {
    var $submit = $("input[type=submit]"),
        $inputs = $('input[name=quest], input[name=answers[]]');

    function checkEmpty() {

        // filter over the empty inputs
        return $inputs.filter(function() {
            return !$.trim(this.value);
        }).length === 0;
    }

    $inputs.on('keyup', function() {
        $submit.prop("disabled", !checkEmpty());
    }).keyup(); // trigger an initial blur
});

Hello!

I want to make the users in the website able only to upload, for example, 1 GB, so that when a user finishes the 1 GB available for his files, he cannot upload more files.

I know how to set up upload limit for a single file in the upload page, or even globally for anyone to upload. But I would like to know how to make each user has specific capacity, and how it is updated so that if he uploads 0.5 GB he has only 0.5 GB left.

I thought of creating a column in the `users` or something concerning upload limit that I will set it (one GB for example). If I will do that, how will I be able to determine how much he uploaded?

Any help would be appreciated.

Thank you!

Hi,

I am trying to limit an user's input based on a text area size which is 180px.

Is this even possible?

There are ways to read how many linebreak's (\n) there are in a text area, but a long sentence will read as one linebreak.

Any Ideaas?

Well this may sound confusing. I tried to findways to allow users to input an integer value and then assign it to a variable called $quantity, but all I could find from the internet was the usage of forms. Do I have to use forms, or can I just try this this simple syntax:


$quantity = "<input name='quantity' type='text' id='quantity' size='3' maxlength='3'>";


If I do have to use forms, then how can I ever assign user's input value to a variable? Please help.

im using the floowing code to pull all alerts from the database. as you can see i have 3 types of alertsd. Profile alerts, forum alerts and topic alerts. They are sorted and placed on the screen under their respective header. However i want to limit it so it only displays 4 of each type of alert. I cant use LIMIT in the query because that would limit all alerts meaning only 4 alerts in total would show up and i just need to limit each alert type. any ideas?


$alert_query = $link->query("SELECT 
                            a.a_aid, a.a_alert_type, a.a_time_alerted, 
                            a.a_fid, a.a_poster, a_alert_read,
                            a.a_tid, c.f_name as cat_name,
                            f.f_fid, f.f_name,
                            t.t_name,
                            u.u_avatar, u.u_avatar_cropped
                            FROM ".TBL_PREFIX."alerts as a
                            LEFT JOIN ".TBL_PREFIX."forums as f
                            ON (f.f_fid = a.a_fid)
                            LEFT JOIN ".TBL_PREFIX."topics as t
                            ON (t.t_tid = a.a_tid)
                            LEFT JOIN ".TBL_PREFIX."forums as c
                            ON (c.f_fid = f.p_id) 
                            LEFT JOIN ".TBL_PREFIX."users as u
                            ON (u.u_username = a.a_poster)
                            WHERE a.a_user_name = '$user_name'
                            ORDER BY a_time_alerted
                            ") or die(print_link_error());
        $alert_info = $alert_query->fetchAll();
        
        $pm_alert_list = '';
        $num_pm_alerts = 0;
        $num_forum_alerts = 0;
        $num_topic_alerts = 0;
        
        foreach($alert_info as $key => $val)
        {
            $alert_info[$key]['a_alert_read'] == 0 ? $color = '#f5dfaf' : $color = '#f4f4f4';
            
            // if alert is a profile message alert
            if($alert_info[$key]['a_alert_type'] == 1)
            {    
                $pm_alert_list .= '<dd style="background:'.$color.';" class="alert" id="alert-'.$alert_info[$key]['a_aid'].'"><p class="alert_intro">';
                $pm_alert_list .= '<input type="checkbox" class="pm_checkbox" id="pm_checkbox-'.$alert_info[$key]['a_aid'].'" />'.profile_link($alert_info[$key]['a_poster']).' posted on your wall</p>';
                $pm_alert_list .= '<p class="alert_time"> on '.asf_date($alert_info[$key]['a_time_alerted'],'full').'</p>';
                $pm_alert_list .= '</dd>';
                $num_pm_alerts++;
            }
            
            if($alert_info[$key]['a_alert_type'] == 2)
            {    
                $forum_alert_list .= '<dd style="background:'.$color.';" class="alert" id="alert-'.$alert_info[$key]['a_aid'].'"><p class="alert_intro">';
                $forum_alert_list .= '<input type="checkbox" class="pm_checkbox" id="pm_checkbox-'.$alert_info[$key]['a_aid'].'" /><strong><a href="'.$config['asf_root'].'category/'.create_url($alert_info[$key]['cat_name']).'/forum/'.create_url($alert_info[$key]['f_name']).'">'.$alert_info[$key]['f_name'].'</a></strong> has a new topic</p>';
                $forum_alert_list .= '<p class="alert_time"> '.asf_date($alert_info[$key]['a_time_alerted'],'full').'</p>';
                $forum_alert_list .= '</dd>';
                $num_forum_alerts++;
            }
            
            if($alert_info[$key]['a_alert_type'] == 3)
            {    
                $topic_alert_list .= '<dd style="background:'.$color.';" class="alert" id="alert-'.$alert_info[$key]['a_aid'].'"><p class="alert_intro">';
                $topic_alert_list .= '<input type="checkbox" class="pm_checkbox" id="pm_checkbox-'.$alert_info[$key]['a_aid'].'" /><strong><a href="'.$config['asf_root'].'category/'.create_url($alert_info[$key]['cat_name']).'/forum/'.create_url($alert_info[$key]['f_name']).'/topic/'.create_url($alert_info[$key]['t_name']).'">'.$alert_info[$key]['t_name'].'</a></strong> has a new post</p>';
                $topic_alert_list .= '<p class="alert_time"> '.asf_date($alert_info[$key]['a_time_alerted'],'full').'</p>';
                $topic_alert_list .= '</dd>';
                $num_topic_alerts++;
            }
        }

This code works fine without the LIMIT 5, but it lists all the results.  With the LIMIT

Code: [Select]
$query = 'SELECT * FROM wp_playerRank WHERE year="2011" LIMIT 5 ORDER BY rankClass ASC';
$results = mysql_query($query);
while($line = mysql_fetch_assoc($results)) {


Here is the error I'm getting:

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in /home/jwrbloom/public_html/resources/players/rank2011_top5.php on line 26

Hello friends,

if i've database table (mytable) has the following ids
1
2
3
4
5
6

and i want to get it with limit the first (1 to 3 ) only

Code: [Select]
$sql ="select *  from  mytable LIMIT 3"; this will show the first 3 (1,2,3)

how then i write code that shows which is after 3
so it shows me
4
5
6

and if there any way i can say
Code: [Select]
$sql ="select *  from  mytable LIMIT (first half of ids)"; and (shows 1,2,3..ect till half)
Code: [Select]
$sql ="select *  from  mytable LIMIT (second half of ids)";
will (shows 4,5,6...ect till end)

 
thank you

Is there a limit to how many items can be stored in an array?

My code looks in a directory of photos and writes the file names into the one-dimensional array.

I just switched from my test folder to my actual photo folder - about 600 photos - and when I ran my script with var_dump enabled, my array only goes up to 128 items (0-127).

I sure hope arrays aren't that wimpy?!

Each photo is about 1-2MB in size, but since I am only storing the file name, I would expect that I could easily store thousands of elements in this array.

What is going on?

 

Im wondering if someone can shed some light on possibly the best way to do this.
I currently have a website which recieves 26000-37000 visits a month. The host got on my case about to many MySql connections and with help from someone here decided a cache system was best. the cache system is now in place and only updates if the cached file is older than 5 days. I am still recieving high connections to my database and wonder if it is spam as i have a search box. the search box once filled in redirects to a page which queries the database for the keyword and displays results and because it was just selecting and not inserting into database i didnt go for the captcha. this is why i suspect spam, I have thought about limiting the amount of search queries per time limit by ip but I am unsure of how to tackle this and if it will help against spam bots?

a google search has only found an answer which stores every visitors ip in a database and keeps count there which I cant see the benefit as it is creating more work for the DB. I have thought maybe creating a session variable that increments with every search and when searching checks this value but I am not to sure if this would help as it would be down to cookie settings.

can anyone shed some light on a possible solution to this.

I am not expecting you to write this for me but for now just to help with the best way to tackle the problem.

Thank you for your time.

Alright so I have some code for pagination... the problem is on the middle pages it will display double the number of results... (IE if its supposed to display 5, it displays 10)

Code: [Select]
// Number of messages per page:
$user_message_number = 5;

$page = $_GET['page'];
if($page <= 1){
$low = 0;
$high = $user_message_number;
} else {
$low = ($page - 1) * $user_message_number;
$high = $page * $user_message_number;
}

$messages = mysql_query("SELECT * FROM messages WHERE recipient='$user_id' ORDER BY id DESC LIMIT $low, $high") or die(mysql_error());
while($pull_messages = mysql_fetch_array($messages)) {
// Displays content
}

That's all of the code that would directly effect the outcome... Any thoughts/comments/suggestions are greatly appreciated.

Hi,

I'm fairly new to all of this and I'm not quite sure what to do. I'm trying to create a field in my database that's 4 hours and 10 minutes into the future from the current time. What data type do I set my field as in the mysql database? How would I populate that mysql field via php.. would I use something like NOW(), or use the php date() function? Also, how would I be able to tell if my field has "expired" (the 4 hours and 10 minutes has elapsed)?

Hi there, im really stuck here. I have a table of records that are selected from my db and put into an array and randomly chooses them, outputting the results .

Code: [Select]
<?php 
$count = 0;
while ($row = mysql_fetch_assoc($Ships4)){
$array[$count]['ShipID'] = $row['ShipID'];
$array[$count]['ShipName'] = $row['ShipName'];
$array[$count]['Dclass'] = $row['Dclass'];
$count++;

$total4 = count($array);
$random4 = rand(0,$total4 - 1);
$random_ship4 = $array[$random4];
$ShipID4 = $random_ship4['ShipID'];
echo $ShipID4;}
This all works fine, however I want to limit the number of random outputs from a number in a record in a different table.

So i added:
Code: [Select]
<?php
if ($count < $row_dclasscorella['Dclass4_totla']){ ?>
the number from the field is 2.

The trouble is that it doesnt take any notice and outputs the total number a random number for each record. It seems its not limiting it. How can i get this to work please???

Code: [Select]
$count = 0;
if ($count < $row_dclasscorella['Dclass4_totla']){
while ($row = mysql_fetch_assoc($Ships4)){
$array[$count]['ShipID'] = $row['ShipID'];
$array[$count]['ShipName'] = $row['ShipName'];
$array[$count]['Dclass'] = $row['Dclass'];
$count++;

$total4 = count($array);
$random4 = rand(0,$total4 - 1);
$random_ship4 = $array[$random4];
$ShipID4 = $random_ship4['ShipID'];
echo $ShipID4;}}?>
Thank You

hello, is there a wat to limit the following to only the first 25 characters?

$customername=$row1["customer"];

thanks