I want to make an image "onfly" with some text. Is it possible with php? I am trying with this one but no output is coming can anyone watch my code please?
function createCaptcha($string){
$image = PATH_DIR . "blueprint/images/bg6.png";
$text_vertical_position = 97;
$font_size = 15;
$color = '32a53d';
Header ("Content-type: image/png");
$color = convert_to_rgb($color);
$info = GetImageSize($image);
$width = $info[0];
$height = $info[1];
if (preg_match("/.gif/", $image)) {
$image = imageCreateFromGif($image);
} elseif (preg_match("/.png/", $image)) {
$image = imageCreateFromPng($image);
} elseif (preg_match("/.jpg/", $image)) {
$image = imageCreateFromJpeg($image);
} elseif (preg_match("/.jpeg/", $image)) {
$image = imageCreateFromJpeg($image);
}
$imgcolor = ImageColorAllocate ($image, $color[0], $color[1], $color[2] );
imagettftext($image, $font_size, 0, $start_length, $text_vertical_position,
$imgcolor, $font , $text);
ImagePNG ($image);
ImageDestroy ($image);
}
I am using codeigniter to make it.
Thank You
It seems you made a mistake in parameter of the function: $string not $text
imagettftext($image, $font_size, 0, $start_length, $text_vertical_position,
$imgcolor, $font, $string);
PS. If you make captcha - it would not reliable without any additional distortion of the image.
Why not to use ready-made solutions?
http://www.phpcaptcha.org/
http://www.captcha.ru/kcaptcha/
Related
I'm trying to take in two sets of x-y co-ordinates from an image in a 7:9 aspect ratio and replace the original image with the cropped section in a 280x360 image, but it's not working. It's not throwing up any errors but the image replacement after cropping doesn't seem to work. Echoing data tells me it takes in everything up to the imagecopyresampled code.
$formDatax1=$_POST["x1"];
$formDatax2=$_POST["x2"];
$formDatay1=$_POST["y1"];
$formDatay2=$_POST["y2"];
$filename='http://pathtofiles/path/photo/'.$a_photo;
$image_info = getimagesize($filename);
switch(strtolower($image_info['mime'])){
case 'image/png' : $image = imagecreatefrompng($filename); $imgtype='png'; break;
case 'image/jpeg': $image = imagecreatefromjpeg($filename); $imgtype='jpg'; break;
case 'image/gif' : $image = imagecreatefromgif($filename); $imgtype='gif'; break;
default: die();
}
$resized_width = ((int)$formDatax2) - ((int)$formDatax1);
$resized_height = ((int)$formDatay2) - ((int)$formDatay1);
$resized_image = imagecreatetruecolor(280, 360);
imagecopyresampled($resized_image, $image, 0, 0, (int)$formDatax1, (int)$formDatay1, 280, 360, $resized_width, $resized_height);
if ($imgtype=='png') {
imagepng($resized_image, $filename);
}
if ($imgtype=='jpg') {
imagejpeg($resized_image, $filename);
}
if ($imgtype=='gif') {
imagejpeg($resized_image, $filename);
}
echo '<script type="text/javascript">alert("Image cropped!"); </script>';
exit();
You're not specifying a new value for $filename. The http[s] URL wrappers can retrieve a file, but not write. You'll need to specify a local filesystem location to save the image to.
This solution is from PHP cookbook 3rd edition
Use the ImageCopyResampled() function, scaling the image as needed.
To shrink proportionally:
$filename = __DIR__ . '/php.png';
$scale = 0.5; // Scale
// Images
$image = ImageCreateFromPNG($filename);
$thumbnail = ImageCreateTrueColor(
ImageSX($image) * $scale,
ImageSY($image) * $scale);
// Preserve Transparency
ImageColorTransparent($thumbnail,
ImageColorAllocateAlpha($thumbnail, 0, 0, 0, 127));
ImageAlphaBlending($thumbnail, false);
ImageSaveAlpha($thumbnail, true);
// Scale & Copy
ImageCopyResampled($thumbnail, $image, 0, 0, 0, 0,
ImageSX($thumbnail), ImageSY($thumbnail),
ImageSX($image), ImageSY($image));
// Send
header('Content-type: image/png');
ImagePNG($thumbnail);
ImageDestroy($image);
ImageDestroy($thumbnail);
To shrink to a fixed-size rectangle:
// Rectangle Version
$filename = __DIR__ . '/php.png';
// Thumbnail Dimentions
$w = 50; $h = 20;
// Images
$original = ImageCreateFromPNG($filename);
$thumbnail = ImageCreateTrueColor($w, $h);
// Preserve Transparency
ImageColorTransparent($thumbnail,
ImageColorAllocateAlpha($thumbnail, 0, 0, 0, 127));
ImageAlphaBlending($thumbnail, false);
ImageSaveAlpha($thumbnail, true);
// Scale & Copy
$x = ImageSX($original);
$y = ImageSY($original);
$scale = min($x / $w, $y / $h);
ImageCopyResampled($thumbnail, $original,
0, 0, ($x - ($w * $scale)) / 2, ($y - ($h * $scale)) / 2,
$w, $h, $w * $scale, $h * $scale);
// Send
header('Content-type: image/png');
ImagePNG($thumbnail);
ImageDestroy($original);
ImageDestroy($thumbnail);
I have a little problem with GD library in PHP - I resize image and then I want crop it to 320px (width) / 240px (height). Let me say that resized image is 320px/300px. When I crop it, a 1-px black strip appears on the bottom of the image - I don't know why.
I'm using imagecrop, imagecreatefromjpeg and imagecopyresampled
Here's the example:
Thanks for your time.
The code
$filename = '../store/projects/project-123.jpg';
$mime = mime_content_type($filename);
list($w, $h) = getimagesize($filename);
$prop = $w / $h;
$new_w = 0;
$new_h = 0;
if ($prop <= 4/3) {
$new_w = 320;
$new_h = (int)floor($h*($new_w/$w));
} else {
$new_h = 240;
$new_w = (int)floor($w*($new_h/$h));
}
$thumb = imagecreatetruecolor($new_w, $new_h);
if (strcmp($mime,'image/png') == 0) {
header('Content-Type: image/png');
$source = imagecreatefrompng($filename);
} else {
header('Content-Type: image/jpeg');
$source = imagecreatefromjpeg($filename);
}
imagecopyresampled($thumb, $source, 0, 0, 0, 0, $new_w, $new_h, $w, $h);
$filename = '../store/projects-thumbs/project-123.jpg';
$crop_data = array('x' => 0 , 'y' => 0, 'width' => 320, 'height'=> 240);
$thumb = imagecrop($thumb, $crop_data);
imagejpeg($thumb, $filename, 100);
imagedestroy($thumb);
imagedestroy($source);
imagecrop() has a known bug that causes the black bottom border to be added.
You can work around the problem using imagecopyresized(). See my answer to another SO question asking for an imagecrop() alternative.
Im using Ajax Crop from enter link description here and I'd like to add a watermark to the script. The following is my script.
WATERMARK
$image_path = "watermark.png";
function watermark_image($oldimage_name, $new_image_name){
global $image_path;
list($owidth,$oheight) = getimagesize($oldimage_name);
$width = 500; $height = 100;
$im = imagecreatetruecolor($width, $height);
$img_src = imagecreatefromjpeg($oldimage_name);
imagecopyresampled($im, $img_src, 0, 0, 0, 0, $width, $height, $owidth, $oheight);
$watermark = imagecreatefrompng($image_path);
list($w_width, $w_height) = getimagesize($image_path);
$pos_x = $width - $w_width;
$pos_y = $height - $w_height;
imagecopy($im, $watermark, $pos_x, $pos_y, 0, 0, $w_width, $w_height);
imagejpeg($im, $new_image_name, 100);
imagedestroy($im);
unlink($oldimage_name);
return true;
}
UPLOAD AND RESIZE PART
function resizeThumb($arr){
$date = md5(time());
$arr['temp_uploadfile'] = $arr['img_src'];
$arr['new_uploadfile'] = $arr['uploaddir'].strtolower($date).'.jpg';
asidoImg($arr);
exit;
}
I tried adding
$arr = watermark_image($arr['temp_uploadfile'],
$arr['uploaddir'].strtolower($date).'.jpg');
in place of
$arr['new_uploadfile'] = $arr['uploaddir'].strtolower($date).'.jpg';
but this didnt work.
Could someone help me?
Download the files and test
It turns out the script uses ASIDO and it has a built in WATERMARK TOOL.
In func.php I done the following.
function asidoImg2($arr){
include('asido/class.asido.php');
asido::driver('gd');
$height = $arr['height'];
$width = $arr['width'];
$x = $arr['x'];
$y = $arr['y'];
// process
$i1 = asido::image($arr['temp_uploadfile'], $arr['new_uploadfile']);
// fit and add white frame
if($arr['thumb'] === true){
Asido::Crop($i1, $x, $y, $width, $height);
asido::watermark($i1, 'watermark.png', ASIDO_WATERMARK_MIDDLE_LEFT, ASIDO_WATERMARK_SCALABLE_ENABLED, 1);
}
else{
Asido::Frame($i1, $width, $height, Asido::Color(255, 255, 255));
asido::watermark($i1, 'watermark.png', ASIDO_WATERMARK_MIDDLE_LEFT, ASIDO_WATERMARK_SCALABLE_ENABLED, 1);
}
// always convert to jpg
Asido::convert($i1, 'image/jpg');
$i1->Save(ASIDO_OVERWRITE_ENABLED);
$data = array(
'photo'=> $arr['new_uploadfile']
);
// echo $user_id;
// delete old file
echo $data['photo'];
}
I'm trying to use the following PHP in order to apply randomly generated text files to an image. (I'm just using a random image right now.)
<?php
header ("Content-type: image/png");
$textfile = "quote.txt";
$quotes = array();
if(file_exists($textfile)){
$quotes = file($textfile);
srand ((float) microtime() * 10000000);
$string = $quotes[array_rand($quotes)];
$string = substr($string,0,strlen($string)-1);
}
else{
$string = "No 'Quote' available at this time.";
}
//$string = "your text";
// try changing this as well
$font = 4;
$width = imagefontwidth($font) * strlen($string) ;
$height = imagefontheight($font) ;
$im = imagecreatefrompng("test.png");
$x = imagesx($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);
ImageDestroy($im);
?>
However, when I run that code the imported image just becomes very blockish.
Here is the image I am testing with:
http://i.stack.imgur.com/LhNkv.png
And here is how it actually appears:
http://i.stack.imgur.com/AAcHZ.png
My research shows that "imagecreate" generates a "palette" image - and I thought that might have something to do with my error, but I have seen plenty of examples where the base image is by no means distorted.
Thanks in advance for your insights.
(Ugh. It wouldn't let me post images but let me upload them just fine?)
Update
Changing the code to:
<?php
header ("Content-type: image/png");
$textfile = "quote.txt";
$quotes = array();
if(file_exists($textfile)){
$quotes = file($textfile);
srand ((float) microtime() * 10000000);
$string = $quotes[array_rand($quotes)];
$string = substr($string,0,strlen($string)-1);
}
else{
$string = "No 'Quote' available at this time.";
}
//$string = "your text";
// try changing this as well
$font = 4;
$width = imagefontwidth($font) * strlen($string) ;
$height = imagefontheight($font) ;
$im = imagecreatefrompng("test.png");
//$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);
ImageDestroy($im);
?>
Produces the same block-like effects as above, except now no text is being written to the image, either (obviously?).
Could be an alpha blending problem. Try adding these before saving the image:
imagealphablending($im, true);
imagesavealpha($im, true);
I'm looking for PHP class (solution) for generating image thumbnails with watermarks on the fly. Any idea ?
I've successfully used this code to add text to an (thumbnail) image:
(note that you'll need to provide a font)
function createImage($in_filename, $out_filename, $width, $height)
{
$src_img = ImageCreateFromJpeg($in_filename);
$old_x = ImageSX($src_img);
$old_y = ImageSY($src_img);
$dst_img = ImageCreateTrueColor($width, $height);
ImageCopyResampled($dst_img, $src_img, 0, 0, 0, 0, $width, $height, $old_x, $old_y);
addWatermark($dst_img);
ImageJpeg($dst_img, $out_filename, 80);
ImageDestroy($dst_img);
ImageDestroy($src_img);
}
function addWatermark($image)
{
$text = "watermark text";
$font = realpath($_SERVER["DOCUMENT_ROOT"] . "/code/COURBD.TTF"); // case sensitive
if ($font == false) return;
$fontSize = 11;
$borderOffset = 4;
$dimensions = ImageTtfBBox($fontSize, 0, $font, $text . "#");
$lineWidth = ($dimensions[2] - $dimensions[0]);
$textX = (ImageSx($image) - $lineWidth) / 2;
$textY = $borderOffset - $dimensions[7];
$white = ImageColorAllocate($image, 240, 240, 240);
ImageTtfText($image, $fontSize, 0, $textX, $textY, $white, $font, $text);
}
Feedback welcome.
You can do this using using the imagecopyresampled() function. Heres a easy and clear tutorial of adding watermark to thumbnails . Also you can use imagettftext() function to use fonts as your watermark
Tutorial Link:
http://www.phpjabbers.com/phpexample.php?eid=20