This small script describes how to add a custom text to an image loaded onto your page. One of my client wanted to add a copyright notice in her images related to her site. So, I came up with this small PHP script for her.
Adding Text to an Image
Using the PHP GD function called imagecreatefromjpeg, imagecreatefromgif and imagecreatefrompng. We can add a custom text to an already existing image file.
So you have imagecreatefromjpeg for jpeg file, imagecreatefrompng for png file and so on.
< ?php header("Content-type: image/png"); $string = "copyright: some text"; $font = 4; $width = imagefontwidth($font)* strlen($string) ; $height = imagefontheight($font) ;
This will setup the structure of the data being sent to the image file as well as what location to place the text at. In this case we want to place it on the bottom right of the page.
Now, we use imagecreatefrompng to create image from a file, set the text color, get the images dimensions, and figure on where to place the text.
$im = imagecreatefrompng("/path/to/yourimagefile"); $x = imagesx($im) - $width ; $y = imagesy($im) - $height; $backgroundColor = imagecolorallocate ($im, 255, 255, 255); //white background $textColor = imagecolorallocate ($im, 0, 0, 0); //black text imagestring ($im, $font, $x, $y, $string, $textColor);
Finally we produce the new image that will display custom text in an image.
imagepng ($im); ?>
Here is the complete code:
< ?php header ("Content-type: image/png"); $string = "your text"; // try changing this as well $font = 4; $width = imagefontwidth($font) * strlen($string) ; $height = imagefontheight($font) ; $im = imagecreatefrompng("/path/to/yourimagefile"); $x = imagesx($im) - $width ; $y = imagesy($im) - $height; $backgroundColor = imagecolorallocate ($im, 255, 255, 255); $textColor = imagecolorallocate ($im, 0, 0,0); imagestring ($im, $font, $x, $y, $string, $textColor); imagepng($im); ?>
You may like to view demo.
josh
May 4, 2008
it didn’t work.. it only outputs the location of the php file but in image form.
bob the dangerous
May 30, 2008
You cannot place any rendering code in this file as it’s returning just an image file.
No session_start, echo or just plain HTML.
máy chiếu,màn chiếu,máy ảnh số
March 1, 2010
i have a images.i want to add a text to this image.you cant give me a example ?
Kunal Khaware
June 19, 2010
It didn’t wrk please change the code
Reni
October 29, 2010
I lost a day because of your code!!!!!!!!!!!
Unrealdragon
January 11, 2011
Modify
$x = imagesx($im) – $width ;
$y = imagesy($im) – $height;
to put the text wherever you want
Make sure you write the file path correctly.
Adedayo Adeniyi
January 18, 2011
Thanks for this excellent tutorial!
Contrary to what others might say, it worked excellently for me!
You saved the day!
Phatricko
March 29, 2011
It works, you just have to get rid of the space in the first line so it knows that it’s PHP.
So change “< ?php" to "<?php"
MFClock
May 31, 2011
works great if you get the image path correct and give imagepng a path to save the file to.