I want to convert a php string to an image.
I use this code
header("Content-type: image/png");
$string = '.the_title().';
$font = 5;
$width = imagefontwidth($font) * strlen($string);
$height = imagefontheight($font);
$image = imagecreatetruecolor ($width,$height);
$white = imagecolorallocate ($image,255,255,255);
$black = imagecolorallocate ($image,0,0,0);
imagefill($image,0,0,$white);
imagestring ($image,$font,0,0,$string,$black);
imagepng ($image);
imagedestroy($image)
but its shows the_title as text instead of executing the string
Use imagecreatefromstring
$string = '.the_title().';
$data = base64_decode($string);
$im = imagecreatefromstring($data);
if ($im !== false) {
header('Content-Type: image/png');
imagepng($im);
imagedestroy($im);
}
Use imagestring like:
<?php
$string = the_title();
$im = imagecreate(150, 20); // image size 150x20px
imagecolorallocate($im, 255, 255, 255); // background white
$text_color = imagecolorallocate($im, 0, 0, 0); // text color black
imagestring($im, 3, 5, 5, $string, $text_color); // append string to image
header('Content-type: image/png'); // filetype
imagepng($im, 'image.png'); // save as image.png
imagedestroy($im); // free up memory
Related
I make an image using PHP but my code turn png transparency into a solid black color, Is there a solution to improve my code?
$filename = 'https://i.ibb.co/9sB9rTM/small-408587143-15774386991of1-2-2-Original-0-test.png';
$widthsrc=0;
$heightsrc=0;
$src1 = imagecreatefrompng($filename);
list($widthsrc, $heightsrc, $typesrc, $attrsrc) = getimagesize($filename);
$background = imagecolorallocatealpha($src1, 255, 255, 255, 127);
$pre = imagecolortransparent($src1, $background);
imagealphablending($src1, false);
imagesavealpha($src1, true);
imagepng($src1);
First use always header like:
header("Content-type: image/png");
Second are you sure when you save image 'black solid' is not trasparent?
Example of creating image:
header("Content-type: image/png");
$string = 'TEXT';
$im = imagecreatefrompng("images/button1.png");
$orange = imagecolorallocate($im, 220, 210, 60);
$px = (imagesx($im) - 7.5 * strlen($string)) / 2;
imagestring($im, 3, $px, 9, $string, $orange);
imagepng($im);
imagedestroy($im);
?>
Currently I am using the PHP code below to convert string text to image with transparent background. Now I need to convert the string text to image with line break, transparent background and also with custom font. Code I am using:
$width = 200;
$height = 40;
$text = "Test text -- line break here -- with line break";
$fontsize = 3;
$img = imagecreate($width, $height);
$black = imagecolorallocate($img, 0, 0, 0);
imagecolortransparent($img, $black);
$color = imagecolorallocate($img, 0, 0, 0);
imagestring($img, $fontsize, 0, 0, $text, $color);
header('Content-type: image/png');
imagepng($img);
imagedestroy($img);
Doing it like this will help you
header("Content-type: image/png");
$str1= 'Test text ';
$str2= 'with line break';
$image= imagecreate(200,40);
$background = imagecolorallocate($image,255,255,255);
$color= imagecolorallocate($image,0,0,0);
imagefill($image,0,0,$background);
imagestring($image,10,5,5,$str1,$color);
imagestring($image,10,5,20,$str2,$color);
imagepng($image);
output look like this
I have following code in a controller under pngtojpgAction() which I am calling using ajax.
Through this
$this->getRequest()->getParam('imagedata'));
statement I am getting a pattern like this data:image/jpeg;base64,/9j/4AAQSkZJR......AH9T796KtUV1HGf/Z
Which is a png image data.
now I am using following code to convert this png image to jpeg and to increase dpi to 300.
public function pngtojpgAction()
{
//Code to convert png to jpg image
$input = imagecreatefrompng($this->getRequest()->getParam('imagedata'));
$width=imagesx($input);
$height=imagesy($input);
$output = imagecreatetruecolor($width, $height);
$white = imagecolorallocate($output, 255, 255, 255);
imagefilledrectangle($output, 0, 0, $width, $height, $white);
imagecopy($output, $input, 0, 0, 0, 0, $width, $height);
ob_start();
imagejpeg($output);
$contents = ob_get_contents();
ob_end_clean();
//echo 'data:image/jpeg;base64,'.base64_encode($contents); /*Up to here code works well*/
$jpgImage='data:image/jpeg;base64,'.base64_encode($contents);
$image = file_get_contents($jpgImage);
$image = substr_replace($image, pack("cnn", 1, 300, 300), 13, 5);
header("Content-type: image/jpeg");
header('Content-Disposition: attachment; filename="'.basename($jpgImage).'"');
echo $image;
}
using this
$image = substr_replace($image, pack("cnn", 1, 300, 300), 13, 5);
I want to increase dpi of image to 300 dpi.
I am unable to change the image dpi using these line of code
$jpgImage='data:image/jpeg;base64,'.base64_encode($contents);
$image = file_get_contents($jpgImage);
$image = substr_replace($image, pack("cnn", 1, 300, 300), 13, 5);
header("Content-type: image/jpeg");
header('Content-Disposition: attachment; filename="'.basename($jpgImage).'"');
echo $image;
I used this link as reference Change image dpi using php
After making some changes it worked for me.
public function pngtojpgAction()
{
//Code to convert png to jpg image
$input = imagecreatefrompng($this->getRequest()->getParam('imagedata'));
$width=imagesx($input);
$height=imagesy($input);
$output = imagecreatetruecolor($width, $height);
$white = imagecolorallocate($output, 255, 255, 255);
imagefilledrectangle($output, 0, 0, $width, $height, $white);
imagecopy($output, $input, 0, 0, 0, 0, $width, $height);
ob_start();
imagejpeg($output);
$contents = ob_get_contents();
//Converting Image DPI to 300DPI
$contents = substr_replace($contents, pack("cnn", 1, 300, 300), 13, 5);
ob_end_clean();
echo 'data:image/jpeg;base64,'.base64_encode($contents);
}
I would use imagemagic instead:
convert Bird.jpg -density 300 Bird2.jpg
But you could allso do that with GD.
Link to class
$filename = 'Bird.jpg';
$source = imagecreatefromjpeg($filename);
list($width, $height) = getimagesize($filename);
$b = new Resampler;
$im = $b->resample($source, $height, $width, 300);
file_put_contents('Bird2.jpg', $im);
Tested on Windows enviroment.
Simple Code to Re-generate image with adjustable quality.
function compress_image($source_url, $destination_url, $quality) {
$info = getimagesize($source_url);
$image = imagecreatefromjpeg($source_url);
imagejpeg($image, $destination_url, $quality);
return $destination_url;
}
echo compress_image($_FILES["file"]["tmp_name"], "destination .jpg", 80);//Adjust Quality
Note: Ensure that the GD library for PHP is installed.
How to make Like This Image?
I just want to learn how do i get output like this using GD library,
Thanks for your help guys..
Here is your code, you could easily find it on google tho.
<?php
header ("Content-type: image/png");
$string = "your text"; // Change this text
$font = 4; // try changing this as well
$width = imagefontwidth($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);
?>
Here's an example:
header('Content-Type: image/png'); // setting the content-type
$file = "yourimage.png";
$image = imagecreatefrompng($file); // creating the image
$font = "YourFont.ttf";
$size = 15; //pixels
$color = imagecolorallocate($image, 255, 255, 255); //white color
$text = "Your text here"
imagettftext($image, 15, 0, 20, 40, $color, $font, $code); // adding the text
imagepng($image); // outputting the image
For more see imagettftext().
EDIT: An example of using multiple imagettftext():
header('Content-Type: image/png'); // setting the content-type
$file = "yourimage.png";
$image = imagecreatefrompng($file); // creating the image
$font = "YourFont.ttf";
$size = 15; //pixels
$color = imagecolorallocate($image, 255, 255, 255); //white color
$text = "Your text here"
imagettftext($image, 15, 0, 20, 40, $color, $font, $code); // adding the text
$text = "Text 2";
imagettftext($image, 15, 0, 25, 45, $color, $font, $code); // adding the text
$text = "Text 3";
imagettftext($image, 15, 0, 30, 50, $color, $font, $code); // adding the text
imagepng($image); // outputting the image
All the examples I've found on the web seem to create pngs with text from an existing png. Is it possible to create a transparent png from scratch and then add text?
The code ive got so far follows (but it doesnt work. just outputs a blank image source)
<?php
$width = 150;
$height = 30;
$text = "My Text";
$fontsize = 5;
$im = imagecreate($width, $height);
$transcolor = imagecolortransparent($im);
imagestring($im, $fontsize, 0, 0, $text, $transcolor);
header('Content-type: image/png');
imagepng($im);
imagedestroy($im);
?>
<?php
$font = 25;
$string = 'My Text';
$im = #imagecreatetruecolor(strlen($string) * $font / 1.5, $font);
imagesavealpha($im, true);
imagealphablending($im, false);
$white = imagecolorallocatealpha($im, 255, 255, 255, 127);
imagefill($im, 0, 0, $white);
$lime = imagecolorallocate($im, 204, 255, 51);
imagettftext($im, $font, 0, 0, $font - 3, $lime, "droid_mono.ttf", $string);
header("Content-type: image/png");
imagepng($im);
imagedestroy($im);
?>
Use imagestring instead of imagettftext if you don't want custom font.
Here's the solution based on your original code.
<?php
$width = 640;
$height = 480;
$text = "My Text";
$fontsize = 5;
$img = imagecreate($width, $height);
// Transparent background
$black = imagecolorallocate($img, 0, 0, 0);
imagecolortransparent($img, $black);
// Red text
$red = imagecolorallocate($img, 255, 0, 0);
imagestring($img, $fontsize, 0, 0, $text, $red);
header('Content-type: image/png');
imagepng($img);
imagedestroy($img);
?>
I Think GD is one of the most popular for generating images, with imagettftext.
<?php
$text = 'SOME TEXT';
$font="c:/windows/Fonts/Latinwd.ttf"; //Load font file for windows
$im = ImageCreate(700, 140);
$bla = imagecolorallocate($im, 0, 0, 0);
imagecolortransparent($im, $bla); //transparent background
$black = imagecolorallocate($im, 255,255,255);
ImageTTFText ($im, 38, 0, 10, 40, $black, $font, $text);
header('Content-Type: image/png');
ImagePNG($im, 'name.png');
imagedestroy($im);
?>