I want to show my visitors the images in a folder and after then have seen it, I want all those files deleted!
This is what I tried, but It won't work. I think it's because PHP is generating a html file which tells the browser it must first get an image from a different place but the html file was already removed.
<?php
foreach (glob("files/*.*") as $prevpic) {
echo '<img src="' . $prevpic . '" />';
}
foreach (glob("files/*.*") as $file) {
unlink($file);
}
move_uploaded_file($_FILES["file"]["tmp_name"], "files/" . $_FILES["file"]["name"]);
?>
You can do something like so ...
<?php
foreach (glob("files/*.*") as $file) {
echo '<img src="data:image/' . pathinfo($file, PATHINFO_EXTENSION) . ';base64,' . base64_encode(file_get_contents($file)) . '" />';
unlink($file);
}
?>
... which is basically writing the image data into the html, and then discarding the image.
I would handle this by simply managing your images through a download script (php).
You track sessions and simply don't display the images requested, but fail gracefully with a response, or let your app handle it via session based tracking.
That way no images are deleted 'onview'.
Related
I can't get the picture to display/show when viewing, although the files are already stored in the database (table 'menu') http://i.imgur.com/wo1w90H.png. Also when I upload the images all at once, their file name would change automatically. I don't know how and why this happens. I use array to upload multiple images.
if (isset($_POST["Submit"])) {
--some code here--
if (isset($_POST["id_list"])) {
// if id list available
foreach($_POST["id_list"] AS $id) {
--some code here--
/* Handle file upload */
if ($_FILES['upload']['error'][$id] == 'UPLOAD_ERR_OK') {
$path = "images/newmenu/";
$path_parts = pathinfo($_FILES["upload"]["name"][$id]);
$extension = $path_parts['extension'];
$picture = md5(uniqid()) . "." . $extension;
if (move_uploaded_file($_FILES['upload']['tmp_name'][$id], $path . "/" . $picture)) {
$update = " UPDATE menu
SET MenuPicture='$picture'
WHERE MenuID=$id";
$mysqli->query($update) or die(mysqli_error($mysqli));
}
}
}
}
}
}
Below is the form and yes it does include enctype="multipart/form-data"
<input type="file" multiple name="upload[' . $id . ']" value="' . $record["MenuPicture"] . '">
Filename changes because you are generating it this way
$picture = md5(uniqid()) . "." . $extension;
uniqid() is based on current time and hashing it will cause the filename to change everytime
When I upload the images all at once, their file name would change automatically
It was due to this:
$picture = md5(uniqid()) . "." . $extension;
// And later
move_uploaded_file($_FILES['upload']['tmp_name'][$id], $path . "/" . $picture)
Basically, you are moving your uploaded file to a new filename for your image file, which is generated using uniqid() and hashed with md5(), with the file extension appended at the end.
I can't get the picture to display/show when viewing
How are you trying to display the picture? Is it from web browser, or you go straight to the directory and open from there? What error(s) did you get, if any?
Actually, have you tried to go to the directory and see whether the file is created inside the images/newmenu/ directory?
Also, for the target upload directory, you might want to append it with $_SERVER['DOCUMENT_ROOT'] so that the target directory is not dependent on where your script is located, but it's always based on the root.
By the way, you might know already, but there is an entry in PHP manual page on uploading multiple files
I am developing a system where the user may upload up to four photos. If the user does not upload a photo I would like that the follow text will be displayed: 'empty'.
I have prepared the below code however I didn't managed :/ The problem is that when an image is uploaded it still prints 'empty' and the uploaded image does not show up.
<?php if (file_exists('../files/collection/photo2/' .$collection['Collection']['photo_dir2'] . '/thumb_' . $collection['Collection']['photo2']))
{
echo $this->Html->image('../files/collection/photo2/' . $collection['Collection']['photo_dir2'] . '/thumb_' . $collection['Collection']['photo2']);}
else
{
echo ('empty');
}
?>
I appreciate you guidance and help :)
TLDR: The file you're checking for doesn't exist. Fix your path.
Detail:
You're trying to use the same path for both your HTML <img> as well as the PHP file_exists() check.
The problem is, that the HTML image is looking for a file via the user's browser, where the file_exists() method is looking for the file via your server. The two paths are very rarely the same.
Try using a correct path in your PHP's file_exists() method, and it should pass the check.
For example:
if(file_exists(APP . 'files' . DS . 'collection' . DS . 'photos2' . $collection['Collection']['photo_dir2'] . DS . 'thumb_' . $collection['Collection']['photo2'])) {
echo $this->Html->image('../files/collection/photo2/' . $collection['Collection']['photo_dir2'] . '/thumb_' . $collection['Collection']['photo2']);
}
else {
echo ('empty');
}
I'm using PHP/MySQL.
I have a folder called "docs" with PDF files.
I'd like to know if there exist an easy way, using only PHP, to show the content of the folder with a custom icon.
I mean, something like this:
[icon] File01.pdf
[icon] File02.pdf
[icon] File03.pdf
In order to allow visitors read or download the files.
Many thanks in advance
With glob() you can get the path to all pdf files and then loop through them with a foreach loop.
foreach(glob('*.pdf') as $file) {
echo '<img src="myicon.png"> ' . $file;
}
You can use pathinfo to get the file extention and show and png with the extention
$fileExt = pathinfo($filename, PATHINFO_EXTENSION);
echo '<img src="path-to-icons/"' . strtolower($fileExt) . '.png" />' . $filename . ''
This was the final solution:
<?php
foreach(glob('docs/*.pdf') as $file) {
echo '' . substr($file, 5, -4) . '</br>';
}
?>
I have used #Karl's and Martin's answers to get the result I was looking for, but all answers were really useful.
Many thanks to all
I'm trying to get a thumbnail to link to a PDF of the same name if the PDF exists, but to not link to anything if the PDF doesn't exist. Here's the code I have:
<?php
if ( function_exists('has_post_thumbnail') && has_post_thumbnail() ) {
$full_image_url = wp_get_attachment_image_src( get_post_thumbnail_id(), 'full') ;
$pdf = substr_replace($full_image_url , 'pdf', strrpos($full_image_url[0] , '.') +1);
$filename = $pdf[0];
if (file_exists($filename)) {
echo '<a href="' . $pdf[0] . '" title="' . the_title_attribute('echo=0') . '" . target="_blank" >';
the_post_thumbnail('Full Size');
echo '</a>';
}
else {
echo "The file $filename exists";
}
}
?>
Currently, the else statement is just to prove whether or not it's finding the file. Which it seems to, as it displays The file http://localhost/AWAD/wp-content/uploads/2012/03/+D.pdf exists. And if I get rid of the conditional, the post thumbnail displays with a link to the PDF. I just can't get the conditional to work.
Can anyone spot why it's not working?
You should pass a path on your FS to file_exists, you are passing an URL now
I'm pretty sure file_exists wants a full file path, not a URL. So, you'll probably want to use the WordPress wp_uploads_dir function to get the base path to your uploads directory and then append the rest of the path to the end of that and then pass that string to file_exists. Hopefully that makes sense.
I'm making a page with some flash games, but, since in the past will be many games it will be very bored to add all those games one by one on the site. I know that using PHP we can get the list of the files in the directory and I know that, using this method, I can display all the games on the directory to the visitors page but, I was thinking if you can help me to add an image to each game that corespond with the name of the game. Ex:
In "games" folder we will have games: play1.swf, play2.swf, play3.swf
and, in "images" directory we will have images: play1.jpg, play2.jpg, play3.jpg.
To display the list of the games, can we make a combination of jpg files with swf files? Play1.jpg will be the image of play1.swf game and, when a visitor clicks on the image, will be redirect to a page named ex: playgames.php?play1
assuming this directory structure:
/foo/images
game1.jpg
game2.jpg
/foo/games
game1.swf
game2.swf
Something like this:
<?php
$dir = "/foo";
$files = new DirectoryIterator($dir . DIRECTORY_SEPARATOR . 'games');
$games = array();
foreach($files as $file){
if (!$file->isDot()) {
$potential_image_location = $file->getPath() . '/../images/' . $file->getBasename('.swf') . '.jpg';
if (file_exists($potential_image_location)) {
$games[$file->getBaseName()] = array(
'game_path' => $file->getPathname(),
'image_path' => realpath($potential_image_location),
);
}
}
}
if (!count($games)) {
die("Sorry, couldn't find any game / image combos");
}
?>
<table>
<?php
foreach ($games as $game_name => $info) {
echo '<tr><td><img src="' . htmlentities($info['image_path']) . '" alt="' . htmlentities($game_name) . '"></td>' . PHP_EOL;
echo '<td>' . $info['game_path'] . '</td></tr>';
}
?>
</table>
its all about using opendir in a clever way, heres the docs on it http://php.net/manual/en/function.opendir.php