| PHP GD Library, PHP GD Tutorial
Tutorial Details:
Learn how to use the PHP GD library in your PHP program to generate dynamic images. Learn how to create and manipulate the GIF, PNG and JPG images.
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 PHP GD Library, PHP GD Tutorial
The PHP GD Library is one of the most used image-processing libraries used..., resize, crop image on the fly.
In this section you will learn PHP GD Library in detail. Let?s get start with the PHP GD Library
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About PHP GD
What is PHP GD Library
GD: The GD graphics library is a developed by Thomas..., PHP,
Tcl, Lua, REXX, Ruby etc.
The GD library is used to create... of GD involve web-site development.
Features of PHP GD Library:
GD
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PHP GD get gd information
<?php
echo '<pre> ';
print_r(gd_info());
echo '</pre> ';
?>
After running the program you will get the following output
Array
(
[GD Version] => bundled (2.0.34 compatible)
[FreeType Support
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php gd blur
<?php
$image = imagecreatetruecolor(225,225);
imagestring($image,
10, 20,
16, 'Roseindia',
0x00ff00);
$gaussian = array(array(1.0,
2.0, 1.0),
array(2.0,
4.0, 2.0),
array(1.0,
2.0, 1.0));
imageconvolution($image
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Php gd hello world
<?php
ini_set("display_errors",
"1");
error_reporting(E_ALL);
header('content-type:
image/png');
$image = imagecreatetruecolor(300,
300);
$dark_grey = imagecolorallocate($image,
102, 102,
102
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How to implement Captcha in PHP Form using GD Library
How to implement Captcha in PHP Form using GD Library Hi,
How to show Captcha in PHP Form. So, please suggest any online reference so that i will try myself.
Thanks
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About PHP GD Arc
PHP GD arc Function
<?php
$img = imagecreate(200, 200);
$red = imagecolorallocate($img, 255, 0, 0);
$black = imagecolorallocate($img, 0, 0, 0);
imagearc($img, 100, 100, 150, 150, 0, 360, $black);
header("Content-type
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PHP GD Add Border to image
<?php
$im = imagecreate(200,
60);
$bg = imagecolorallocate($im,
225, 225,
225);
$textcolor = imagecolorallocate($im,
0, 0,
255);
imagestring($im,
5, 30,
20, "Roseindia",
$textcolor);
$bordercolors
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PHP GD copy of image
<?php
$src = imagecreatefromjpeg('images.jpg');
$dest = imagecreatetruecolor(80,
40);
imagecopy($dest,
$src, 0,
0, 20,
13, 80,
40);
header('Content-Type:
image/jpeg');
imagejpeg($dest);
imagedestroy($dest
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PHP GD draw line
<?php
header ("Content-type:
image/jpeg");
$handle = ImageCreate (130,
50) or die
("Cannot Create
image");
$bg_color = ImageColorAllocate ($handle,
255, 0,
0);
$txt_color = ImageColorAllocate
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PHP GD spiral Images
<?php
$text =
"Roseindia Roseindia Roseindia
Roseindia Roseindia Roseindia Roseindia Roseindia Roseindia Roseindia Roseindia";
$image =
imagecreatetruecolor(400,400);
$white =
imagecolorallocate($image,255,255,255
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PHP GD polygon Shapes
<?php
$points =
shape(8,100);
$points =
translatePolygon($points,100,100);
$image =
imagecreatetruecolor(200,200);
$white =
imagecolorallocate($image,255,255,255);
imagefill($image,0,0,$white);
$red
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php gd Wbmp
<?php
$im = imagecreatetruecolor(120,
20);
$text_color = imagecolorallocate($im,
225, 0,
0);
imagestring($im,
1, 5,
5, 'Roseindia',
$text_color);
imagewbmp($im,
'simpletext.wbmp');
echo "Wbmp file
created
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php gd image create from string
<?php
$String = 'iVBORw0KGgoAAAANSUhEUgAAABwAAAASCAMAAAB/2U7WAAAABl'
. 'BMVEUAAAD///+l2Z/dAAAASUlEQVR4XqWQUQoAIAxC2/0vXZDr'
. 'EX4IJTRkb7lobNUStXsB0jIXIAMSsQnWlsV+wULF4Avk9fLq2r
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PHP GD captcha
<?php
session_start();
class CaptchaSecurityImages {
var $font
= 'C:/WINNT/Fonts/arial.ttf';
function generateCode($characters)
{
$possible...
initialize new GD image stream');
$background_color =
imagecolorallocate($image
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PHP GD image set pixel
<?php
$x = 200;
$y = 200;
$gd = imagecreatetruecolor($x,
$y...; 190);
$red = imagecolorallocate($gd,
255, 255,
255);
for ($i
= 0;
$i < 100000;
$i++) {
imagesetpixel($gd,
round($x),round($y),
$red
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PHP GD imagesy
<?php
$img = imagecreatetruecolor(300,
200);
echo imagesy($img);
?>
After running the program you will get the following output
OUTPUT:200
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PHP GD imagesx
<?php
$img = imagecreatetruecolor(300,
200);
echo imagesx($img);
?>
After running the program you will get the following output
OUTPUT :300
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PHP GD crop image
<?php
$src = imagecreatefromjpeg('image1.jpg');
$dest = imagecreatetruecolor(80,
40);
imagecopy($dest,
$src, 0,
0, 20,
13, 80,
40);
header('Content-Type:
image/jpeg');
imagegif($dest);
imagedestroy($dest
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PHP GD rotate image
<?php
$image = 'images.jpg';
$degrees = 180;
header('Content-type:
image/jpeg') ;
$source = imagecreatefromjpeg($image)
;
$rotate = imagerotate($source,
$degrees, 0)
;
imagejpeg($rotate)
;
?>
After running
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PHP GD Hue an Image
<?php
$im = imagecreatefromJPEG('images.jpg');
echo 'Hue white&
black:' . imagecolorclosesthwb($im,
116, 115,
152);
imagedestroy($im);
?>
After running the program you will get the following output
OUTPUT:Hue
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PHP GD imagettfbox
<?php
$im = imagecreatetruecolor(300,
150);
$black...';
$bbox = imagettfbbox(10,
45, $font,
'PHP version ' .
phpversion...,
$black, $font,
'PHP version ' .
phpversion());
$bbox = imagettfbbox(10
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PHP GD font size
<?php
header ("Content-type:
image/png");
$handle = ImageCreate (130,
50) or die
("Cannot Create
image");
$bg_color = ImageColorAllocate ($handle,
255, 0,
0);
$txt_color = ImageColorAllocate
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PHP GD filters
<?php
try{
if(!$image=imagecreatefromjpeg('images.jpg')){
throw new Exception('Error
creating image');
}
if(!imagefilter($image,IMG_FILTER_COLORIZE,255,0,0)){
throw new Exception("
Can't filter image");
}
header
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PHP GD fill image
<?php
$im = imagecreatetruecolor(55,
30);
$white = imagecolorallocate($im,
255, 255,
255);
imagefilledrectangle($im,
4, 4,
50, 25,
$white);
imagejpeg($im,
'imagefilledrectangle.jpg');
echo("Image
filled
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PHP GD Merge Image
<?php
$backgroundSource = "merge.jpg";
$feedBurnerStatsSource = "images.jpg";
$outputImage = imagecreatefromjpeg($backgroundSource);
$feedBurnerStats = imagecreatefromjpeg($feedBurnerStatsSource
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PHP GD image convolution
<?php
$image = imagecreatefromjpeg('images.jpg');
$emboss = array(array(2,
0, 0),
array(0,
-1, 0),
array(0,
0, -1));
imageconvolution($image,
$emboss, 1,
127);
header('Content-Type:
image/jpeg');
imagejpeg($image
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PHP GD bold text
<?php
header('Content-type:
image/png');
$image = imagecreatetruecolor(400,
30);
$red = imagecolorallocate($image,
255, 0,
0);
$grey = imagecolorallocate($image,
128, 128,
128);
$black = imagecolorallocate($image
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PHP GD draw text
<?php
header('Content-type:
image/png');
$im = imagecreatetruecolor(400,
30);
$white = imagecolorallocate($im,
255, 255,
255);
$grey = imagecolorallocate($im,
128, 128,
128);
$black = imagecolorallocate($im,
0, 0
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PHP GD imagettftext
<?php
header('Content-type:
image/png');
$im = imagecreatetruecolor(400,
30);
$white = imagecolorallocate($im,
255, 255,
255);
$grey = imagecolorallocate($im,
128, 128,
128);
$black = imagecolorallocate($im,
0, 0
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PHP GD image filter
<?php
$logo1 = imagecreatefromjpeg('images.jpg');
$logo2 = imagecreatefromjpeg('images.jpg');
$output = imagecreatetruecolor(imagesx($logo1)
* 2, imagesy($logo1));
imagefilter($logo1,
IMG_FILTER_PIXELATE, 3);
imagefilter
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PHP GD circle
<?php
$text =
"RoseindiaRoseindiaRoseindiaRoseindiaRoseindia
";
$image =
imagecreatetruecolor(400,400);
$white =
imagecolorallocate($image,255,255,255);
imagefill($image,0,0,$white);
$red =
imagecolorallocate
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PHP GD Draw Rectangle
<?php
header("Content-type:
image/jpeg");
$width = 350;
$height = 360;
$im = ImageCreateTrueColor($width,
$height);
ImageAntiAlias($im,
true);
$white = ImageColorAllocate($im,
255, 255,
255
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PHP GD graphics
<?php
$img = imagecreate(250,80);
$black = imagecolorallocate($img,
0, 0,
0);
$white = imagecolorallocate($img,
255, 255,
255);
$red = imagecolorallocate($img,
255, 0,
0);
$green = imagecolorallocate($img,
0, 255
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PHP GD Grayscale
<?php
$file = 'images.jpg';
header('Content-type:
image/jpeg');
list($width,
$height) =
getimagesize($file);
$source = imagecreatefromjpeg($file);
$bwimage= imagecreate($width,
$height);
for ($c=0;$c<256;$c
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PHP GD watermark an Image
<?php
ini_set("display_errors",
"1");
error_reporting(E_ALL);
$image_src = 'images.jpg';
$watermark_src = 'watermark.jpg';
$opacity = 30;
$padding = 20;
$image = imagecreatefromjpeg($image_src
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PHP GD art
<?php
$width=200;
$height=200;
Header("Content-type:
image/jpeg");
$im =
imagecreate($width,$height);
$white=ImageColorAllocate($im,255,255,255);
$blue=ImageColorAllocate($im,1,18,250);
$red=ImageColorAllocate
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PHP GD line graph
<?php
header("Content-type:
image/png");
$arrval = array(12,123,21,32,77,85,166,176,163,121);
$height = 260;
$width = 330;
$im = imagecreate($width,$height);
$white = imagecolorallocate($im,255,255,255
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PHP GD add text to image
PHP GD Add Text to Image Example
<?php
header ("Content-type:
image/jpeg");
$string = "This
is my text";
$font = 4;
$width = imagefontwidth($font)
* strlen($string) ;
$height = imagefontheight
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PHP GD Create Thumbnail
<?php
$i =
new imagethumbnail();
$i->open("index.jpg");
$i->setX(100);
header("Content-type:
image/jpeg;");
$i->imagejpeg();
class imagethumbnail
{
var $filename;
var $x;
var $y;
var $image
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PHP GD Punch
<?php
$image =
imagecreatefromjpeg("images.jpg");
$displacement =
displacement($image);
$image =
imagedisplace($image,$displacement);
header("Content-type:
image/jpeg");
imagejpeg($image);
imagedestroy
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PHP GD imagesetbrush() Function
<?php
$php =
imagecreatefromjpeg('im.jpg');
$im...);
imagefilledrectangle($im,
0, 0,
299, 99,
$white);
imagesetbrush($im,
$php);
imageline...');
imagejpeg($im);
imagedestroy($im);
imagedestroy($php);
?>
After
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PHP GD Captcha Refersh
index.php
<?php
session_start();
if(isset($_POST['submit_x'])
&...;title>Captcha</title>
</head>
<body>
<?php...;<?php
echo $_SERVER['PHP_SELF'];
?>" method="post"
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php gd background color
<?php
header("Content-type:
image/png");
$width = 350;
$height = 360;
$im =
ImageCreateTrueColor($width,
$height);
$red = ImageColorAllocate($im,
255, 0,
0);
ImageFillToBorder($im,
0, 0,
$red, $red
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PHP GD xpm
<?php
if(!(imagetypes() & IMG_XPM))
{
die('Support
for xpm was not found!');
}
$xpm = imagecreatefromxpm('./example.xpm');
imagejpeg($im,
'./example.jpg', 100);
imagedestroy($im);
?>
After running the program
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PHP GD Colorization of image
<?php
$im = imagecreatefromjpeg('images.jpg');
if($im
&& imagefilter($im,
IMG_FILTER_COLORIZE, 0,
255, 0))
{
echo 'Image
successfully shaded green.';
imagejpeg($im,
'images.jpg');
imagedestroy($im);
}
else
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PHP GD dashed line
<?php
header("Content-type:
image/png");
$width =
350;
$height =
360;
$im = ImageCreateTrueColor($width,
$height);
ImageAntiAlias($im,
true);
$white = ImageColorAllocate($im,
255, 255,
255
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PHP GD imagecopyresampled
<?php
$filename = 'image1.jpg';
$percent = 0.2;
header('Content-type:
image/jpeg');
list($width,
$height) =
getimagesize($filename);
$new_width = $width
* $percent;
$new_height = $height
* $percent;
$image_p
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PHP GD Gradient Fill
<?php
$image = ImageCreate(200, 200);
for($i=0; $i<255; $i++) {
$background_color = ImageColorAllocate($image, $i, $i, $i);
}
$text_color = ImageColorAllocate($image, 255, 255, 255);
$tekst = "
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PHP GD gif
<?php
function LoadGif($imgname)
{
$im =
@imagecreatefromgif($imgname);
if(!$im)
{
$im =
imagecreatetruecolor (150,
30);
$bgc =
imagecolorallocate ($im,
255, 0,
0);
$tc =
imagecolorallocate ($im,
0, 0,
0
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