I would like to do the following:
I have an existing .jpg picture from a Webcam.
Now I would like to overlay this Picture with the following Widget:
<div style="width:250px">Wetter in Eglisau<br /><script src="http://wetter.webmart.de/e/782303"></script></div>
Then the picture should be saved under a new name in the same folder.
Can I do this with a PHP Script?
I have searched tutorials, but the are all for only text or Image over Image etc.
Unfortunately, php can't help you with this. If you need to produce just one single picture, then image editor will do.
But I guess, you need to automate this process with fresh webcam images and weather updates. I would recommend to create a web page with two image as #MilanG suggested using css tricks. After that you can use some headless browser to capture the screen, e.g. PhantomJS http://phantomjs.org/ will do.
Again, as I wrote in the beginning, php cannot help you with this task.
You have image manipulation libraries for PHP. i.e.:
http://php.net/manual/en/book.imagick.php
http://php.net/manual/en/book.image.php
if you want that overlay to be part of the image.
Other way use absolute positioning for overlay block, give it higher Z-index and place it over the image.
Related
I Googled a lot but no sufficient ans was found.
I need to place an image (900 X 5200 px) in one of my pages. As the image is sensitive, I need to prevent users from copying the image. I have an idea that can do this:
I will divide the image into pieces. Then the image grid will be loaded into some divs. So user won't be able to save the image. Or he/she will save only 1 square cm part of the whole image.
But this plan will not work if some small parts of the grid fails to load. So, I want to do another thing. I want to load the full image then cut the image into parts. Then show the parts altogether in divs.
This requires javascript. But I am confused how to start and need your help.
Now you know the matter, if you have better idea please share.
Thanks in advance.
The trick is simple. Create a div with the background being the image you want to display. Layer a div with a transparent image over it. When user goes to save the image, they get a blank. Program your server to not return "direct" requests for the image (so some clever chap can't just look at the css and retrieve the URL to the image).
Granted the image will still be in their cache but so would the sliced image so it won't make it impossible just more difficult for a determined person to retrieve the picture.
TL;DR Don't over engineer a solution, print screen will get around anything you do.
You are not going to be able to prevent people from copying this image. Plain and simple. Regardless of your best efforts, a simple PRT SCRN and paste into Paint will be enough.
Your best bet will be to not over engineer this and simply place a watermark and copyright notice on the page. Other options can include placing a transparent <div> over the top of the image so it cannot be right-click'ed and saved, but it still will not prevent the image from being stored in the user's cache. Or stop them from using developer tools or Firebug to find the source image.
You can do this with:
http://www.pixastic.com/lib/docs/actions/crop/
Yet you need to develop your logic around that library.
I have made example, you can see it on this link:
http://simplestudio.rs/yard/crop_img/
Basically you can get URL to your image via php and using my code or code similar to it crop your image into pieces and display them on canvas.
This way image is not accessible via browser or inspect element or what so ever. User can save the pieces individually but you can configure my code for piece to be 5px, I set it to 20x20px.
* test saving image piece by doing right click anywhere on image and do a "Save image as.." option.
Also you need to think of way how to hide src to image provided by php, if you need help on that I can help you.
Is it possible to display some php content within an HTML image (say display on the screen of an iPhone where iPhone being an image)
Well, if you just want to overlay text on an image, why create an image at all.
you can use css background image(iphone in this case) for a div and the insert your phpp content as a child of that div. Using proper css styling and positioning, you will get your desired look. Its simple and less server consuming than going the image creation way.
You could generate your own image on the server using the GD library to overlay your content onto the image and then send that to the client.
You can use CSS to achieve the same effect, without requiring any server processing; however, it must be an image, you might want to check out the image processing library that allows you to manipulate images using PHP http://php.net/manual/en/book.image.php.
Is there any way to show an image without its path. I mean not using HTML tag, I'd like to use PHP to show image. Because if I use HTML, someone can save or share that image.
Edit: I'm sorry about my question is not clear. I don't mean preventing saving image. I mean not showing the file path "/path/to/image.jpg" on URI or HTML. Because I don't want user copy and share the link which contains that image right on my website. The only way to share that image is to "Save Image As" and share it. Anyway thank you all.
This is my solution:
<?php
$image = 'new.png';
$content = file_get_contents($image);
header('Content-Type: image/jpeg');
echo $content; exit();
If the browser can view it, the user can save it. There's no way around that rule.
The only exception to this is if you recreate the image using 1x1 pixel divs of the colour of each pixel in the image, which is extremely heavy-handed and only usable in the slightest when the image is very small.
Even if you output the image with PHP, it will need to use HTML. There is no way to prevent a user from saving an image.
You could try using the image as a background-image with CSS, which will prevent non-advanced users from saving the image, but anyone who knows how to inspect the DOM or read CSS won't have any issue saving it.
Consider this - by the time a user sees the image on a page, their browser has already downloaded the file to the user's hard drive.
This is my solution:
<?php
$image = 'new.png';
$content = file_get_contents($image);
header('Content-Type: image/jpeg');
echo $content; exit();
You can give base64 of your image as src in <img> tag.
Example:
<img src="data:image/png;base64,--your 64--" alt="Red dot" />
As dtbarne explained any advanced user can get the image. However people do several things to prevent this form average users.
Disabling right click
Show in a popup with no tool bar
Set images with CSS to hide the path in as we use in <img src = "">
Load images using javascript
Generate dynamic images using PHP. It need check authentication and timestamp before generating the image.
There may be other ways too. Just for your consideration.
rendering anything in the page needs HTML in some way. this also means that it IS visible somewhere in the code - some directly visible, some require a debug tool to intercept.
you can make it impossible for people to steal the image in the following ways (some not ideal but does the job)
use flash/silverlight as a frame - though not ideal, it does help you prevent those who right-click and save. you can't view the flash source either.
use a background image - size a div enough to fit the image in it (since divs rely on explicit dimensions or children's dimensions to stretch it). the url is viewable on the CSS (unless it's dynamically placed)
use an image that has a "shield" - to do this, create a container div and place your image in it. in the same container, have a div that covers the image (absolute position, z-high z-index). this prevents the "right-click save" method. but the image path is in the source (unless it's dynamically placed as well)
you might think of canvas, but canvas is like a bitmap (therefore a picture still) so still a no-go from there.
all of which are not a fool-proof method. the only way you can avoid people from stealing owning images is to actually use a watermark. they may save but can't own it since it will have a watermark (like your name) across it.
If the client can see your image, users can save it anyway.
I've searched for ages for a solution, but I can't really find the solution to fit my needs.
So here's the story. Im creating a website and I really want to add watermarks to the downloaded images.
Yesterday I was browsing in a website called 9gag. If you haven't heard this website before, its a comic based website, and I found out that when you download an image, or access an image from anywhere else except their website, there's a 'watermark/banner' at the bottom of the image.
For example take this image:
link , notice no banner at the bottom of the image.
If you right-click, 'Copy image URL' , you get this link: image . See the banner now?
Im very confused on how they do it, and it would be great if we could use this on our websites.
Anyone with any ideas? Is it using any type of CGI?
P.S: I Wasn't sure what tags to add, So if anyone knows a better tag combination, please do edit it.
This effect is just a css trick. The image itself actually contains the watermark at the bottom, but the image tag is wrapped in a block that hides (overflow:hidden) the bottom 42 pixels of the image when it's being displayed in the page.
There are other things you can do that are more sophisticated (for instance, have the image served via a php script and comparing the http referer
header("content-type: image/jpeg");
if (!isset($_SERVER['HTTP_REFERER'])){die("alert('Restricted Access!');");};
$_u=parse_url($_SERVER['HTTP_REFERER']);
$_u=preg_replace("/(www.)/i","",strtolower($_u['host']));
$_i=$_SERVER['HTTP_HOST'];
$_i=preg_replace("/(www.)/i","",strtolower($_i));
if ($_u != $_i){
//handle this with gd or redirect
}
) but this will only work if someone tries to load the image from a different website or if they go to the image url... generally save-as will save the image from the browser's cache, so the css trick might be the best option you have (or a combination of these options). Fundamentally keep in mind that anything you show on the web can be captured (the code above isn't foolproof, and you can always prtsc).
GD library of php will help you doing that.
You'll need to create a new image using imagecreate function but adding some more "space" to the original size. Example: if I have an image of 200x200 (which you can retrieve using gd functions too) you'll need to create a 200x220px image using that function
Fill the new image with that gray color using imagefilledrectangle function
Copy the original image into the new one using imagecopy
Set the header's content type to image/type png gif etc..
Output to the image using imagepng or any other function that has the format you want.
I've had success with JQuery Watermark:
Jquery Watermark
I am using a jQuery plugin http://odyniec.net/projects/imgareaselect/ that allows cropping of an image.
I have search high and low for a tutorial that allows me to over write the file on the server with the cropped version...but found nothing of use.
I am using the basic integration of the plugin inside Facebox. This is working fine.
I have a button on the page which says 'Save', when that is clicked I would like to store the new image (cropped) on the server.
Any suggestions or need further information?
Check out this awesome tutorial
I use Jcrop for my projects works great!
http://deepliquid.com/content/Jcrop.html
http://deepliquid.com/projects/Jcrop/demos.php?demo=live_crop <--
Have you taken a look at the links at the very bottom of the plugin page? There are some useful links including this one. It should help you get started with the php side of things
Turned out the that image I was uploading was bigger than the area size of the cropping tool.
Image was 1024x768 however I resized the image to fit within 500x500 overlay.
I will need to resize and save new sized image during the upload.
Thanks for all your suggestions.