Gd With Php FINAL

8/2/2019 Gd With Php FINAL

1/17

About PHP GD: In this tutorial you will get to know about PHP GD, The GD library is used

to create dynamic image creation. GD is an open source code library, This tutorial also

includes the steps by which you can enable the GD option of WAMP server.

What is PHP GD Library

GD: The GD graphics library is a developed by Thomas Boutell. Previously Gd stood for "GIF

Draw" after some legal issues now it stood for "Graphics Draw". GD supports numerous

languages like C, PHP, Tcl, Lua, REXX, Ruby etc.

The GD library is used to create dynamic image creation. GD is an open source code library

and written in 'C' and wrappers are available for Perl, PHP and other languages. GD can create

images composed of lines, arcs, other images etc. It can used to create and manipulate image

files in a variety of different image formats including GIF, PNG, JPEG, WBMP, and XPM etc.

We can generate charts, graphics, thumbnails, etc. It can do some complex tasks like complex

graphic editing: grayscaling or applying other filters to a photo, anti-robot security image. Most

common applications of GD involve web-site development.

Features of PHP GD Library:

1. GD is an open source code library

2. Written in 'C'

3. Wrappers are available for Perl, PHP and other languages

4. Create images composed of lines, arcs etc.

5. Generate charts, graphics, thumbnails, etc

6. It supports different image formats including GIF, PNG, JPEG, WBMP, and XPM etc

7. It can do some complex tasks like complex graphic editing: grayscaling etc.

How to enable GD option in WAMP:

i) Run WAMP server:


2/17

ii) Select PHP settings from PHP option:

iii) Check php_gd2 option, if it is unchecked (by default it is checked)


3/17

Introduction

PHP is not limited to creating just HTML output. It can also be used to create and

manipulate image files in a variety of different image formats, including GIF, PNG,JPEG, WBMP, and XPM. Even more convenient, PHP can output image streams

directly to a browser. You will need to compile PHP with the GD library of image

functions for this to work. GD and PHP may also require other libraries, depending on

which image formats you want to work with.

You can use the image functions in PHP to get the size of JPEG, GIF, PNG, SWF, TIFF

and JPEG2000 images.

With the exif extension, you are able to work with information stored in headers of

JPEG and TIFF images. This way you can read meta data generated by digital cameras.

The exif functions do not require the GD library.

Note: Read the requirements section about how to expand image capabilities to read,

write and modify images. To read meta data of pictures taken by digital cameras you

need the above mentioned exif extension.

Note: The getimagesize()function does not require the GD extension.

Requirements

If you have the GD library (available at http://www.libgd.org/) you will also be able

to create and manipulate images.

The format of images you are able to manipulate depend on the version of GD you

install, and any other libraries GD might need to access those image formats. Versions

of GD older than gd-1.6 support GIF format images, and do not support PNG, where

versions greater than gd-1.6 and less than gd-2.0.28 support PNG, not GIF. GIF support

was re-enabled in gd-2.0.28.

Note: Since PHP 4.3 there is a bundled version of the GD lib. This bundled version has

some additional features like alpha blending, and should be used in preference to the

external library since its codebase is better maintained and more stable.

You may wish to enhance GD to handle more image formats.

Supported image formats

Image

formatLibrary to download Notes

gif Only supported in GD

versions older than gd-

1.6 and newer than gd-
http://www.php.net/manual/en/ref.exif.phphttp://www.php.net/manual/en/ref.exif.phphttp://www.php.net/manual/en/function.getimagesize.phphttp://www.php.net/manual/en/function.getimagesize.phphttp://www.libgd.org/http://www.php.net/manual/en/ref.exif.phphttp://www.php.net/manual/en/function.getimagesize.phphttp://www.libgd.org/http://www.php.net/manual/en/ref.exif.php


4/17


Image

formatLibrary to download Notes

2.0.28.Read-only GIF

support is available with

PHP 4.3.0 and thebundled GD-library.

Write support is

available since PHP

4.3.9 and PHP 5.0.1.

jpeg

http://pecl2.php.net/downloads/php-windows-

builds/source/

When building the jpeg

library (prior to building

PHP) you must use the

--enable-shared option

in the configure step. If

you do not, you willreceive an error saying

libjpeg.(a|so) not found

when you get to the

configure step of

building PHP.

png https://reader009.{domain}/reader009/html5/0505/5aecdc4460cbe/5aecdc4785026..htmlOnly supported in GD

versions greater than

gd-1.6.

xpm ftp://metalab.unc.edu/pub/Linux/libs/X/!INDEX.html

It's likely you have this

library already

available, if yoursystem has an installed

X-Environment.

You may wish to enhance GD to deal with different fonts. The following font libraries

are supported:

Supported font libraries

Font

libraryDownload Notes

FreeType1.x

http://www.freetype.org/ This deprecated feature willcertainly be removedin the

future.

FreeType

2 http://www.freetype.org/

T1lib ftp://sunsite.unc.edu/pub/Linux/libs/graphics/)Support for Postscript Type

1 fonts.

Installation
http://pecl2.php.net/downloads/php-windows-builds/source/http://pecl2.php.net/downloads/php-windows-builds/source/http://www.libpng.org/pub/png/libpng.htmlhttp://www.freetype.org/http://www.freetype.org/http://pecl2.php.net/downloads/php-windows-builds/source/http://pecl2.php.net/downloads/php-windows-builds/source/http://www.libpng.org/pub/png/libpng.htmlhttp://www.freetype.org/http://www.freetype.org/


5/17

To enable GD-support configure PHP --with-gd[=DIR] , where DIR is the GD base

install directory. To use the recommended bundled version of the GD library (which

was first bundled in PHP 4.3.0), use the configure option --with-gd . GD library

requires libpng and libjpeg to compile.

In Windows, you'll include the GD2 DLLphp_gd2.dllas an extension inphp.ini. TheGD1 DLLphp_gd.dllwas removed in PHP 4.3.2. Also note that the preferred truecolor

image functions, such asimagecreatetruecolor(), require GD2.

Enhance the capabilities of GD to handle more image formats by specifying the --with-

XXXXconfigure switch to your PHP configure line.


Image

FormatConfigure Switch

jpegTo enable support for jpeg add

--with-jpeg-dir=DIR. Jpeg 6b, 7 or 8 are

supported.

pngTo enable support for png add --with-png-dir=DIR. Note, libpng requires

the zlib library, therefore add --with-zlib-dir[=DIR] to your configure line.

xpm

To enable support for xpm add --with-xpm-dir=DIR. If configure is not

able to find the required libraries, you may add the path to your X11

libraries.

Note: When compiling PHP with libpng, you must use the same version that was linked

with the GD library.

Enhance the capabilities of GD to deal with different fonts by specifying the --with-XXXXconfigure switch to your PHP configure line.

Supported font libraries

Font library Configure Switch

FreeType 1.x To enable support for FreeType 1.x add --with-ttf[=DIR] .

FreeType 2To enable support for FreeType 2 add --with-freetype-

dir=DIR.

T1libTo enable support for T1lib (Postscript Type 1 fonts) add

with-t1lib[=DIR] .

Native TrueType stringfunction

To enable support for native TrueType string function add--enable-gd-native-ttf.

PHP Form Image Upload
http://www.php.net/manual/en/function.imagecreatetruecolor.phphttp://www.php.net/manual/en/function.imagecreatetruecolor.phphttp://www.php.net/manual/en/zlib.requirements.phphttp://www.php.net/manual/en/function.imagecreatetruecolor.phphttp://www.php.net/manual/en/zlib.requirements.php


6/17

This tutorial shows you how to upload an image on your server

using PHP and html forms. You will also learn how to verify if the uploaded

file is an image (checking the extension), if it doesn't overtakes a size

limit and how to change the uploaded file name.

Important: You must set the enctype form atribute to "multipart/form-

data", otherwise the form will not show you any errors, but it will just not

upload your images!

Step 1: Create a folder named images located in the path you are planningto place the php script you are about to create. Make sure it has write rights

for everybody or the scripts won't work ( it won't be able to upload the files

into the directory).

Step 2: Paste the following code into a php file.

Please read carefuly the comments. All steps are explained there.


7/17

errro occures. If the error occures the file will not beuploaded.

$errors=0;

//checks if the form has been submitted

if(isset($_POST['Submit']))

{

//reads the name of the file the user submitted for uploading

$image=$_FILES['image']['name'];

//if it is not empty

if($image)

{

//get the original name of the file from the clients machine

$filename = stripslashes($_FILES['image']['name']);

//get the extension of the file in a lower case format

$extension = getExtension($filename);

$extension = strtolower($extension);

//if it is not a known extension, we will suppose it is an error

and will not upload the file, otherwize we will do more tests

if (($extension != "jpg") && ($extension != "jpeg") &&

($extension != "png") && ($extension != "gif"))

{

//print error message

echo 'Unknown extension!';

$errors=1;

}

else

{

//get the size of the image in bytes

//$_FILES['image']['tmp_name'] is the temporary filename of the

file in which the uploaded file was stored on the server

$size=filesize($_FILES['image']['tmp_name']);

//compare the size with the maxim size we defined and print error

if bigger

if ($size > MAX_SIZE*1024)

{

echo 'You have exceeded the size limit!';

$errors=1;

}

//we will give an unique name, for example the time in unix timeformat


8/17

$image_name=time().'.'.$extension;

//the new name will be containing the full path where will be

stored (images folder)

$newname="images/".$image_name;

//we verify if the image has been uploaded, and print error

instead

$copied = copy($_FILES['image']['tmp_name'], $newname);

if (!$copied)

{

echo 'Copy unsuccessfull!';

$errors=1;

}}}}

//If no errors registred, print the success message

if(isset($_POST['Submit']) && !$errors)

{

echo "File Uploaded Successfully! Try again!";

}

?>

GD and Image Functions

Table of Contents

gd_info Retrieve information about the currently installed GD library getimagesize Get the size of an image
http://www.php.net/manual/en/function.gd-info.phphttp://www.php.net/manual/en/function.getimagesize.phphttp://www.php.net/manual/en/function.gd-info.phphttp://www.php.net/manual/en/function.getimagesize.php


9/17

image_type_to_extension Get file extension for image type image_type_to_mime_type Get Mime-Type for image-type returned

by getimagesize, exif_read_data, exif_thumbnail, exif_imagetype

image2wbmp Output image to browser or file

imagealphablending Set the blending mode for an image

imageantialias Should antialias functions be used or not

imagearc Draws an arc imagechar Draw a character horizontally

imagecharup Draw a character vertically

imagecolorallocate Allocate a color for an image

imagecolorallocatealpha Allocate a color for an image

imagecolorat Get the index of the color of a pixel

imagecolorclosest Get the index of the closest color to the specifiedcolor

imagecolorclosestalpha Get the index of the closest color to thespecified color + alpha

imagecolorclosesthwb Get the index of the color which has the hue,

white and blackness imagecolordeallocate De-allocate a color for an image

imagecolorexact Get the index of the specified color

imagecolorexactalpha Get the index of the specified color + alpha imagecolormatch Makes the colors of the palette version of an image

more closely match the true color version

imagecolorresolve Get the index of the specified color or its closestpossible alternative

imagecolorresolvealpha Get the index of the specified color + alpha orits closest possible alternative

imagecolorset Set the color for the specified palette index

imagecolorsforindex Get the colors for an index imagecolorstotal Find out the number of colors in an image's palette imagecolortransparent Define a color as transparent

imageconvolution Apply a 3x3 convolution matrix, using coefficientand offset

imagecopy Copy part of an image

imagecopymerge Copy and merge part of an image imagecopymergegray Copy and merge part of an image with gray

scale

imagecopyresampled Copy and resize part of an image withresampling

imagecopyresized Copy and resize part of an image

imagecreate Create a new palette based image imagecreatefromgd2 Create a new image from GD2 file or URL

imagecreatefromgd2part Create a new image from a given part ofGD2 file or URL

imagecreatefromgd Create a new image from GD file or URL

imagecreatefromgif Create a new image from file or URL

imagecreatefromjpeg Create a new image from file or URL

imagecreatefrompng Create a new image from file or URL

imagecreatefromstring Create a new image from the image stream inthe string

imagecreatefromwbmp Create a new image from file or URL

imagecreatefromxbm Create a new image from file or URL

imagecreatefromxpm Create a new image from file or URL imagecreatetruecolor Create a new true color image
http://www.php.net/manual/en/function.image-type-to-extension.phphttp://www.php.net/manual/en/function.image-type-to-mime-type.phphttp://www.php.net/manual/en/function.image2wbmp.phphttp://www.php.net/manual/en/function.imagealphablending.phphttp://www.php.net/manual/en/function.imageantialias.phphttp://www.php.net/manual/en/function.imagearc.phphttp://www.php.net/manual/en/function.imagechar.phphttp://www.php.net/manual/en/function.imagecharup.phphttp://www.php.net/manual/en/function.imagecolorallocate.phphttp://www.php.net/manual/en/function.imagecolorallocatealpha.phphttp://www.php.net/manual/en/function.imagecolorat.phphttp://www.php.net/manual/en/function.imagecolorclosest.phphttp://www.php.net/manual/en/function.imagecolorclosestalpha.phphttp://www.php.net/manual/en/function.imagecolorclosesthwb.phphttp://www.php.net/manual/en/function.imagecolordeallocate.phphttp://www.php.net/manual/en/function.imagecolorexact.phphttp://www.php.net/manual/en/function.imagecolorexactalpha.phphttp://www.php.net/manual/en/function.imagecolormatch.phphttp://www.php.net/manual/en/function.imagecolorresolve.phphttp://www.php.net/manual/en/function.imagecolorresolvealpha.phphttp://www.php.net/manual/en/function.imagecolorset.phphttp://www.php.net/manual/en/function.imagecolorsforindex.phphttp://www.php.net/manual/en/function.imagecolorstotal.phphttp://www.php.net/manual/en/function.imagecolorstotal.phphttp://www.php.net/manual/en/function.imagecolortransparent.phphttp://www.php.net/manual/en/function.imageconvolution.phphttp://www.php.net/manual/en/function.imagecopy.phphttp://www.php.net/manual/en/function.imagecopymerge.phphttp://www.php.net/manual/en/function.imagecopymergegray.phphttp://www.php.net/manual/en/function.imagecopyresampled.phphttp://www.php.net/manual/en/function.imagecopyresized.phphttp://www.php.net/manual/en/function.imagecreate.phphttp://www.php.net/manual/en/function.imagecreatefromgd2.phphttp://www.php.net/manual/en/function.imagecreatefromgd2part.phphttp://www.php.net/manual/en/function.imagecreatefromgd.phphttp://www.php.net/manual/en/function.imagecreatefromgif.phphttp://www.php.net/manual/en/function.imagecreatefromgif.phphttp://www.php.net/manual/en/function.imagecreatefromjpeg.phphttp://www.php.net/manual/en/function.imagecreatefrompng.phphttp://www.php.net/manual/en/function.imagecreatefromstring.phphttp://www.php.net/manual/en/function.imagecreatefromwbmp.phphttp://www.php.net/manual/en/function.imagecreatefromxbm.phphttp://www.php.net/manual/en/function.imagecreatefromxpm.phphttp://www.php.net/manual/en/function.imagecreatetruecolor.phphttp://www.php.net/manual/en/function.image-type-to-extension.phphttp://www.php.net/manual/en/function.image-type-to-mime-type.phphttp://www.php.net/manual/en/function.image2wbmp.phphttp://www.php.net/manual/en/function.imagealphablending.phphttp://www.php.net/manual/en/function.imageantialias.phphttp://www.php.net/manual/en/function.imagearc.phphttp://www.php.net/manual/en/function.imagechar.phphttp://www.php.net/manual/en/function.imagecharup.phphttp://www.php.net/manual/en/function.imagecolorallocate.phphttp://www.php.net/manual/en/function.imagecolorallocatealpha.phphttp://www.php.net/manual/en/function.imagecolorat.phphttp://www.php.net/manual/en/function.imagecolorclosest.phphttp://www.php.net/manual/en/function.imagecolorclosestalpha.phphttp://www.php.net/manual/en/function.imagecolorclosesthwb.phphttp://www.php.net/manual/en/function.imagecolordeallocate.phphttp://www.php.net/manual/en/function.imagecolorexact.phphttp://www.php.net/manual/en/function.imagecolorexactalpha.phphttp://www.php.net/manual/en/function.imagecolormatch.phphttp://www.php.net/manual/en/function.imagecolorresolve.phphttp://www.php.net/manual/en/function.imagecolorresolvealpha.phphttp://www.php.net/manual/en/function.imagecolorset.phphttp://www.php.net/manual/en/function.imagecolorsforindex.phphttp://www.php.net/manual/en/function.imagecolorstotal.phphttp://www.php.net/manual/en/function.imagecolortransparent.phphttp://www.php.net/manual/en/function.imageconvolution.phphttp://www.php.net/manual/en/function.imagecopy.phphttp://www.php.net/manual/en/function.imagecopymerge.phphttp://www.php.net/manual/en/function.imagecopymergegray.phphttp://www.php.net/manual/en/function.imagecopyresampled.phphttp://www.php.net/manual/en/function.imagecopyresized.phphttp://www.php.net/manual/en/function.imagecreate.phphttp://www.php.net/manual/en/function.imagecreatefromgd2.phphttp://www.php.net/manual/en/function.imagecreatefromgd2part.phphttp://www.php.net/manual/en/function.imagecreatefromgd.phphttp://www.php.net/manual/en/function.imagecreatefromgif.phphttp://www.php.net/manual/en/function.imagecreatefromjpeg.phphttp://www.php.net/manual/en/function.imagecreatefrompng.phphttp://www.php.net/manual/en/function.imagecreatefromstring.phphttp://www.php.net/manual/en/function.imagecreatefromwbmp.phphttp://www.php.net/manual/en/function.imagecreatefromxbm.phphttp://www.php.net/manual/en/function.imagecreatefromxpm.phphttp://www.php.net/manual/en/function.imagecreatetruecolor.php


10/17

imagedashedline Draw a dashed line imagedestroy Destroy an image

imageellipse Draw an ellipse

imagefill Flood fill

imagefilledarc Draw a partial arc and fill it

imagefilledellipse Draw a filled ellipse

imagefilledpolygon Draw a filled polygon imagefilledrectangle Draw a filled rectangle

imagefilltoborder Flood fill to specific color

imagefilter Applies a filter to an image

imagefontheight Get font height

imagefontwidth Get font width

imageftbbox Give the bounding box of a text using fonts via freetype2

imagefttext Write text to the image using fonts using FreeType 2

imagegammacorrect Apply a gamma correction to a GD image imagegd2 Output GD2 image to browser or file

imagegd Output GD image to browser or file

imagegif Output image to browser or file imagegrabscreen Captures the whole screen

imagegrabwindow Captures a window

imageinterlace Enable or disable interlace imageistruecolor Finds whether an image is a truecolor image

imagejpeg Output image to browser or file

imagelayereffect Set the alpha blending flag to use the bundled libgdlayering effects

imageline Draw a line

imageloadfont Load a new font

imagepalettecopy Copy the palette from one image to another

imagepng Output a PNG image to either the browser or a file imagepolygon Draws a polygon imagepsbbox Give the bounding box of a text rectangle using

PostScript Type1 fonts

imagepsencodefont Change the character encoding vector of a font

imagepsextendfont Extend or condense a font

imagepsfreefont Free memory used by a PostScript Type 1 font imagepsloadfont Load a PostScript Type 1 font from file

imagepsslantfont Slant a font

imagepstext Draws a text over an image using PostScript Type1 fonts

imagerectangle Draw a rectangle

imagerotate Rotate an image with a given angle

imagesavealpha Set the flag to save full alpha channel information(as opposed to single-color transparency) when saving PNG images

imagesetbrush Set the brush image for line drawing imagesetpixel Set a single pixel

imagesetstyle Set the style for line drawing

imagesetthickness Set the thickness for line drawing

imagesettile Set the tile image for filling

imagestring Draw a string horizontally

imagestringup Draw a string vertically imagesx Get image width

imagesy Get image height

imagetruecolortopalette Convert a true color image to a palette image

imagettfbbox Give the bounding box of a text using TrueType fonts imagettftext Write text to the image using TrueType fonts
http://www.php.net/manual/en/function.imagedashedline.phphttp://www.php.net/manual/en/function.imagedestroy.phphttp://www.php.net/manual/en/function.imageellipse.phphttp://www.php.net/manual/en/function.imagefill.phphttp://www.php.net/manual/en/function.imagefill.phphttp://www.php.net/manual/en/function.imagefilledarc.phphttp://www.php.net/manual/en/function.imagefilledellipse.phphttp://www.php.net/manual/en/function.imagefilledpolygon.phphttp://www.php.net/manual/en/function.imagefilledrectangle.phphttp://www.php.net/manual/en/function.imagefilltoborder.phphttp://www.php.net/manual/en/function.imagefilter.phphttp://www.php.net/manual/en/function.imagefontheight.phphttp://www.php.net/manual/en/function.imagefontwidth.phphttp://www.php.net/manual/en/function.imageftbbox.phphttp://www.php.net/manual/en/function.imagefttext.phphttp://www.php.net/manual/en/function.imagegammacorrect.phphttp://www.php.net/manual/en/function.imagegd2.phphttp://www.php.net/manual/en/function.imagegd.phphttp://www.php.net/manual/en/function.imagegif.phphttp://www.php.net/manual/en/function.imagegif.phphttp://www.php.net/manual/en/function.imagegrabscreen.phphttp://www.php.net/manual/en/function.imagegrabwindow.phphttp://www.php.net/manual/en/function.imageinterlace.phphttp://www.php.net/manual/en/function.imageistruecolor.phphttp://www.php.net/manual/en/function.imagejpeg.phphttp://www.php.net/manual/en/function.imagelayereffect.phphttp://www.php.net/manual/en/function.imageline.phphttp://www.php.net/manual/en/function.imageloadfont.phphttp://www.php.net/manual/en/function.imagepalettecopy.phphttp://www.php.net/manual/en/function.imagepng.phphttp://www.php.net/manual/en/function.imagepolygon.phphttp://www.php.net/manual/en/function.imagepsbbox.phphttp://www.php.net/manual/en/function.imagepsencodefont.phphttp://www.php.net/manual/en/function.imagepsextendfont.phphttp://www.php.net/manual/en/function.imagepsfreefont.phphttp://www.php.net/manual/en/function.imagepsloadfont.phphttp://www.php.net/manual/en/function.imagepsslantfont.phphttp://www.php.net/manual/en/function.imagepstext.phphttp://www.php.net/manual/en/function.imagerectangle.phphttp://www.php.net/manual/en/function.imagerotate.phphttp://www.php.net/manual/en/function.imagesavealpha.phphttp://www.php.net/manual/en/function.imagesetbrush.phphttp://www.php.net/manual/en/function.imagesetpixel.phphttp://www.php.net/manual/en/function.imagesetpixel.phphttp://www.php.net/manual/en/function.imagesetstyle.phphttp://www.php.net/manual/en/function.imagesetthickness.phphttp://www.php.net/manual/en/function.imagesettile.phphttp://www.php.net/manual/en/function.imagestring.phphttp://www.php.net/manual/en/function.imagestringup.phphttp://www.php.net/manual/en/function.imagesx.phphttp://www.php.net/manual/en/function.imagesy.phphttp://www.php.net/manual/en/function.imagetruecolortopalette.phphttp://www.php.net/manual/en/function.imagettfbbox.phphttp://www.php.net/manual/en/function.imagettftext.phphttp://www.php.net/manual/en/function.imagedashedline.phphttp://www.php.net/manual/en/function.imagedestroy.phphttp://www.php.net/manual/en/function.imageellipse.phphttp://www.php.net/manual/en/function.imagefill.phphttp://www.php.net/manual/en/function.imagefilledarc.phphttp://www.php.net/manual/en/function.imagefilledellipse.phphttp://www.php.net/manual/en/function.imagefilledpolygon.phphttp://www.php.net/manual/en/function.imagefilledrectangle.phphttp://www.php.net/manual/en/function.imagefilltoborder.phphttp://www.php.net/manual/en/function.imagefilter.phphttp://www.php.net/manual/en/function.imagefontheight.phphttp://www.php.net/manual/en/function.imagefontwidth.phphttp://www.php.net/manual/en/function.imageftbbox.phphttp://www.php.net/manual/en/function.imagefttext.phphttp://www.php.net/manual/en/function.imagegammacorrect.phphttp://www.php.net/manual/en/function.imagegd2.phphttp://www.php.net/manual/en/function.imagegd.phphttp://www.php.net/manual/en/function.imagegif.phphttp://www.php.net/manual/en/function.imagegrabscreen.phphttp://www.php.net/manual/en/function.imagegrabwindow.phphttp://www.php.net/manual/en/function.imageinterlace.phphttp://www.php.net/manual/en/function.imageistruecolor.phphttp://www.php.net/manual/en/function.imagejpeg.phphttp://www.php.net/manual/en/function.imagelayereffect.phphttp://www.php.net/manual/en/function.imageline.phphttp://www.php.net/manual/en/function.imageloadfont.phphttp://www.php.net/manual/en/function.imagepalettecopy.phphttp://www.php.net/manual/en/function.imagepng.phphttp://www.php.net/manual/en/function.imagepolygon.phphttp://www.php.net/manual/en/function.imagepsbbox.phphttp://www.php.net/manual/en/function.imagepsencodefont.phphttp://www.php.net/manual/en/function.imagepsextendfont.phphttp://www.php.net/manual/en/function.imagepsfreefont.phphttp://www.php.net/manual/en/function.imagepsloadfont.phphttp://www.php.net/manual/en/function.imagepsslantfont.phphttp://www.php.net/manual/en/function.imagepstext.phphttp://www.php.net/manual/en/function.imagerectangle.phphttp://www.php.net/manual/en/function.imagerotate.phphttp://www.php.net/manual/en/function.imagesavealpha.phphttp://www.php.net/manual/en/function.imagesetbrush.phphttp://www.php.net/manual/en/function.imagesetpixel.phphttp://www.php.net/manual/en/function.imagesetstyle.phphttp://www.php.net/manual/en/function.imagesetthickness.phphttp://www.php.net/manual/en/function.imagesettile.phphttp://www.php.net/manual/en/function.imagestring.phphttp://www.php.net/manual/en/function.imagestringup.phphttp://www.php.net/manual/en/function.imagesx.phphttp://www.php.net/manual/en/function.imagesy.phphttp://www.php.net/manual/en/function.imagetruecolortopalette.phphttp://www.php.net/manual/en/function.imagettfbbox.phphttp://www.php.net/manual/en/function.imagettftext.php


11/17

imagetypes Return the image types supported by this PHP build imagewbmp Output image to browser or file

imagexbm Output XBM image to browser or file

iptcembed Embeds binary IPTC data into a JPEG image

iptcparse Parse a binary IPTC block into single tags.

jpeg2wbmp Convert JPEG image file to WBMP image file

png2wbmp Convert PNG image file to WBMP image file

This tutorial is about the displaying the hello world in PHP GD Library.

After running the program you will get the following output
http://www.php.net/manual/en/function.imagetypes.phphttp://www.php.net/manual/en/function.imagewbmp.phphttp://www.php.net/manual/en/function.imagexbm.phphttp://www.php.net/manual/en/function.iptcembed.phphttp://www.php.net/manual/en/function.iptcparse.phphttp://www.php.net/manual/en/function.jpeg2wbmp.phphttp://www.php.net/manual/en/function.png2wbmp.phphttp://www.php.net/manual/en/function.imagetypes.phphttp://www.php.net/manual/en/function.imagewbmp.phphttp://www.php.net/manual/en/function.imagexbm.phphttp://www.php.net/manual/en/function.iptcembed.phphttp://www.php.net/manual/en/function.iptcparse.phphttp://www.php.net/manual/en/function.jpeg2wbmp.phphttp://www.php.net/manual/en/function.png2wbmp.php


12/17

Related Tags for Php gd hello world:

This example shows how to show captcha in php gd.


13/17

$i++;

}

return $code;

}

function CaptchaSecurityImages($width='120',$height='40',$characters='6') {

$code = $this->generateCode($characters);

$font_size = $height * 0.75;

$image = imagecreate($width, $height) ordie('Cannot initialize new GD image stream');

$background_color= imagecolorallocate($image, 255, 255, 255);

$text_color= imagecolorallocate($image, 20, 40, 100);

$noise_color= imagecolorallocate($image, 100, 120, 180);

for( $i=0; $i


14/17

imagettftext($image, $font_size, 0, $x, $y, $text_color, $this->font , $code) ordie('Error in

imagettftext function');

header('Content-Type: image/jpeg');

imagejpeg($image);

imagedestroy($image);

$_SESSION['security_code'] = $code;

}

}

$width = isset($_GET['width']) && $_GET['width'] < 600 ? $_GET['width'] : '120';

$height = isset($_GET['height']) && $_GET['height'] < 200 ? $_GET['height'] : '40';

$characters = isset($_GET['characters']) && $_GET['characters'] > 2 ? $_GET['characters'] : '6';

$captcha = new CaptchaSecurityImages($width,$height,$characters);

?>


Related Tags for PHP GD captcha:

This example shows how to bold text in php gd.


15/17

$grey = imagecolorallocate($image, 128, 128, 128);

$black = imagecolorallocate($image, 0, 0, 0);

imagefilledrectangle($image, 0, 0, 399, 29, $red);

$text = 'RoseIndia...';

$font = 'C:/WINNT/Fonts/arial.ttf';

imagettftext($image, 20, 0, 11, 21, $grey, $font, $text);

imagettftext($image, 20, 0, 10, 20, $black, $font, $text);

imagepng($image);

imagedestroy($image);

?>


Related Tags for PHP GD bold text:

This example shows how to draw rectangle in php gd.


16/17

$white = ImageColorAllocate($im, 255, 255, 255);

ImageFillToBorder($im, 0, 0, $white, $white);

$black = ImageColorAllocate($im, 0, 0, 0);

$blue = ImageColorAllocate($im, 0, 0, 255);

$r_width = 140;

$r_height = 90;

$r_x = 90;

$r_y = 40;

ImageRectangle($im, $r_x, $r_y, $r_x+$r_width, $r_y+$r_height, $black);

$r_width = 140;

$r_height = 90;

$r_x = 90;

$r_y = 180;

ImageFilledRectangle($im, $r_x, $r_y, $r_x+$r_width, $r_y+$r_height, $blue);

ImageJPEG($im);

ImageDestroy($im);

?>



17/17

Related Tags for PHP GD Draw Rectangle:

Documents

Gd With Php FINAL