Jump to content
  • Announcements

    • boen_robot

      Guidelines and Netiquette   03/28/2017

      Posting Problems:   Having problems posting your topic? Read through this: To join, you agree to our terms and conditions and fill out and submit a registration form. An activation email will be sent to your email adress, so you'll need to verify your account. After that the account has to be validated by one of the moderators. This will mean that it can take up to a day to be activated. A couple of things to remember to ensure approval: Don't use an email address in one of those $2 four character .com domains eg. xyds.com. These will be deleted and the domain added to the banned list. Don't use an email address that is within a domain with a bad reputation for spam. A Google search is run on every email address and email domain. Don't sign up with an email address that doesn't exist, doesn't work or requires the sender to answer a quiz before their email can get to you. Put your country and or state and city in the signup form. Blank forms will go to the botton of the "to do" list. And make sure that your email address and your country match, saying you're from Alabama and using a .ru email address is not going to get you activated. After a membership is activated the first few posts will be monitored. Posting spam or unapproved topics described in the agreement results in an immediate ban. The email provider and the IP addresses associated with the account will be banned and all posts will be deleted. These strict measures have been deemed necessary to hinder spam. Sorry for any inconvenience this causes, but it's not liable to change. If, after reading this, you still can't post and don't understand why, contact one of the Moderators listed here.   Topic Guidelines   Including the following information can expedite an accurate response from board members: Must be a Specific Problem or Question related to web design and development Include Code in Question (wrap with   for small blocks of code and for longer blocks   ) Include Code Author Include Extra Notes/Modifications/Attempts Include web link to page/file when possible Content Guidelines   You may not post, upload, link to, or email any Content that contains, promotes, gives instruction about, or provides prohibited Content. Prohibited Content includes any Content that breaks any local, state, county, national or international law. Prohibited Content also includes: No direct or indirect advertising or websites, forums, products, services No hijacking of posts (do not post your question in someone elses) Content that infringes upon any rights [ex. MP3s and ROMs] (including, but not limited to, copyrights and trademarks) Abusive, threatening, defamatory, racist, or obscene Viruses or any other harmful computer software False Information or libel Spam, chain letters, or Pyramid schemes Gambling or Illicit drugs Terrorism Hacking or cheating for internet/online games Warez, Roms, CD-Keys, Cracks, Passwords, or Serial Numbers Pornography, nudity, or sexual material of any kind Excessive profanity Invasive of privacy or impersonation of any person/entity Hacking materials or information Posting Tips   There are more BBcodes than there are buttons for on the reply menu. To get the full list, click "BB Code Help" underneath the clickable smilie face menu. Use   for small snippets of code Use   for lengthy snippets of code Use   if your snippet is HTML (optional) Use   if your snippet is SQL (optional) Rules of Conduct   Be nice. There's no need for calling someone stupid if they ask an 'easy' question. Keep your avatars and signatures absolutely child friendly. We have a younger audience on this forum. Keep your language appropriate for the same reason above. Do not PM moderators for help on the forum. Post on the topic, or create a new one.   Spam:   Recently, as you have all without doubt noticed, we have had lots of spam and advertisement on the forum. Therefore, we'd like to alert you as to what to do when you have found any of the aforementioned annoying messages: it. Immediately. Give a clear reason, please, if the advertising is not evident. DO NOT POST! Report, let the post stay as is, and we will get to it, meanwhile if you continue to post as normal in the other threads, it won't be on the top so long. Refrain from PMing the member. This won't help at all, as they are most likely spambots anyway. Thank you.       Images in signatures:   After thinking of users on dial-up, we have decided to enforce the following rules regarding signatures. Please pay heed to them. Respecting these rules is respecting the members on this forum with dial-up. Signature rules: No animated images AT ALL. No matter the amount of animation. Maximum image widthxheight: 300x150 Maximum image (file) size: 15kb Use calm colors. Do not use highly contrasting images in your signature, as this can get really annoying when seeing several posts from one member in the same thread. The same prohibited content goes for images as for posts. Lastly, use common sense. No lengthy signatures please. Save us some scrolling. Thank you.       Links in signatures:   Please understand that w3schools.com only exists because of voluntary work and is barely supported by the advertising littered throughout the tutorials and the forum. So, please, stop advertising other sites. DO not post links that drive traffic away from the w3schools domain - especially to a site that offers similar if not identical information. Please help support the site by keeping individuals on it. Thank you. Here are some guidelines as to what you can put in your signature: w3schools links --> allowed w3.org links --> allowed browser links --> allowed html editor links --> allowed personal sites --> allowed tutorial sites competing with w3schools --> NOT allowed sites completely irrelevant to webprogramming and this forum --> NOT allowed   Thanks for understanding, and for taking the time to read this. ~W3Schools Modstaff~

Few PHP questions (folders and files)

Recommended Posts

Sunamena    3

Hello everyone i have a few PHP questions.

First one:

How can I say that for each image in a specified folder, it has to place that image?
I have 10 images in the gallery folder (tomorow it can be 12). How do i tell my code to place an <img src="filename"> for each image?

Second question: 

When displaying something that a user posted (example: guestbook). How can i allow ENTERS to be displayed when getting the data from the database? It always skips the enters.

Third question: 

How exactly can i allow users to upload a file to a certain folder (must be a jpg file). The name of the image will be modified, and it should be resized to 200 kilobyte.


Fourth question:

Can i change certain parts of the text i get from the database (example: ":)" and change it to something differently? Say: "<img src="smily.png>"?

Thanks in advance for the answers =D

Edited by Sunamena

Share this post

Link to post
Share on other sites
Ingolme    794

You can use scandir() to list files in a directory and generate the HTML for the images.

The line breaks exist, but HTML doesn't render line breaks unless you specifically put a <br> element. You can use nl2br() to show line breaks in the text provided by users.

You can't choose the size of a file, but you can give a size limit in the file uploader. There are plenty of PHP file upload tutorials, you should look at some of them. The W3Schools tutorial has sections explaining how to limit the file size and file type.

You can use str_replace() to change substrings into something else, such as in the following example:

$string = str_replace(':)', '<img src="smiley.gif">', $string);


  • Like 1

Share this post

Link to post
Share on other sites
Junitar    3

I'm not a PHP expert but for your first question, I would recommend you to use the FilesystemIterator class (implemented in PHP ≥ 5.3). I've just finished doing an image gallery for my project and this is the easiest, most straigth-forward approach I've found.

Here is an example on how to use it:

$dir = '/yourDirectory';
$fileDir = new FilesystemIterator($dir); // creates a new instance of the class as $fileDir
foreach ($fileDir as $file) {
	if ($file->getExtension() == 'jpg') {  // lists all .jpg in $dir
    		echo '<img src="'.$file.'"/>

Hope that helps.

Share this post

Link to post
Share on other sites
Gabrielphp    6

First question, something like this should work:

I made this with my own paths so you can understand what is the difference between $dir and $path_images.

If you don't use the if condition then your scandir will show other files that will corrupt the img tag.

$dir = '/xampp/htdocs/test/uploads';
$path_images = 'uploads/';
$files = scandir($dir);

foreach($files as $key)
	if(!preg_match('/.jpg|.jpeg/', $key)) continue;
	echo '<img src="' . $path_images . $key . '">';

Second question

As @Ingolme said you can use n2lbar() for that.

Let's take this script as an example:

//First we need to access data
try {
	$sql = "SELECT user_comment FROM comments";
	$stmt = $db->prepare($sql);
catch (PDOException $e)
	echo "Error: " . $e->getMessage();

//Now fetch it and display it
while ($row = $stmt->fetch())
	echo nl2br($row['user_comment']);
	//This will display row breaks

Third question

I don't know to properly resize a picture with php, i think it's not that easy to do that, but, you can just add a if condition so that the user can upload only jpeg file about 200kb, this way will cut a lot of your work to code.

And what do you mean by a specific directory? You want like an user to have it's own directory?

Fourth question

The user @Ingolme explained it pretty well with str_replace(); .

Edited by Gabrielphp

Share this post

Link to post
Share on other sites
iwato    6

How are you using your images?  What is the purpose of their display?  Do you understand Javascript and jQuery.  I have found Colorbox (a jQuery plug-in) to be very useful.  It is client-side.


p.s. No offense implied to the server-side PHP forum! :-)

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now