Which of the following is not a valid php gd function

Table of Contents

• gd_info — Retrieve information about the currently installed GD library
• getimagesize — Get the size of an image
• getimagesizefromstring — Get the size of an image from a string
• 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
• imageaffine — Return an image containing the affine transformed src image, using an optional clipping area
• imageaffinematrixconcat — Concatenate two affine transformation matrices
• imageaffinematrixget — Get an affine transformation matrix
• imagealphablending — Set the blending mode for an image
• imageantialias — Should antialias functions be used or not
• imagearc — Draws an arc
• imageavif — Output image to browser or file
• imagebmp — Output a BMP image to browser or file
• 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 specified color
• imagecolorclosestalpha — Get the index of the closest color to the specified 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 closest possible alternative
• imagecolorresolvealpha — Get the index of the specified color + alpha or its 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 coefficient and 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 with resampling
• imagecopyresized — Copy and resize part of an image
• imagecreate — Create a new palette based image
• imagecreatefromavif — Create a new image from file or URL
• imagecreatefrombmp — Create a new image from file or URL
• imagecreatefromgd2 — Create a new image from GD2 file or URL
• imagecreatefromgd2part — Create a new image from a given part of GD2 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 in the string
• imagecreatefromtga — Create a new image from file or URL
• imagecreatefromwbmp — Create a new image from file or URL
• imagecreatefromwebp — 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
• imagecrop — Crop an image to the given rectangle
• imagecropauto — Crop an image automatically using one of the available modes
• 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
• imageflip — Flips an image using a given mode
• 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
• imagegetclip — Get the clipping rectangle
• imagegetinterpolation — Get the interpolation method
• 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 layering effects
• imageline — Draw a line
• imageloadfont — Load a new font
• imageopenpolygon — Draws an open polygon
• imagepalettecopy — Copy the palette from one image to another
• imagepalettetotruecolor — Converts a palette based image to true color
• imagepng — Output a PNG image to either the browser or a file
• imagepolygon — Draws a polygon
• imagerectangle — Draw a rectangle
• imageresolution — Get or set the resolution of the image
• imagerotate — Rotate an image with a given angle
• imagesavealpha — Whether to retain full alpha channel information when saving PNG images
• imagescale — Scale an image using the given new width and height
• imagesetbrush — Set the brush image for line drawing
• imagesetclip — Set the clipping rectangle
• imagesetinterpolation — Set the interpolation method
• 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
• imagetypes — Return the image types supported by this PHP build
• imagewbmp — Output image to browser or file
• imagewebp — Output a WebP image to browser or file
• imagexbm — Output an 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

felipensp at gmail dot com ¶

16 years ago

Representation decimal of a color in hexadecimal for use on functions of library GD.

michal-ok at o2 dot pl ¶

16 years ago

The image sharpen function [by Alex R. Austin] provided below seems to be very resource hungry and I couldn't make it work on two different servers - trying to sharpen a 413 x 413 image I ended up with "Fatal error: Allowed memory size of 8388608 bytes exhausted" or "Internal Server Error" or the script terminated without notice. Because I had no priviliges to change the default memory limit on these servers I started looking for other sharpen functions. I have come across a php Unsharp Mask function which works like a charm on both of the servers I dealt with. It can be found at //vikjavev.no/hovudsida/umtestside.php.

shd at earthling dot net ¶

16 years ago

If you happen to need a way to output a Windows BMP file [e.g. when using the PEAR ExcelWriter], feel free to use the following code:



It works the same way as regular imagejpeg/imagepng do and only supports GD2.0 true colour bitmaps [which is what's required by ExcelWriter].

chuckstudios at gmail dot com ¶

13 years ago

I wrote a simple function to convert an image resource to PGM [portable graymap] in order to feed it to an OCR program. It works just like the rest of the image output functions, and will convert to grayscale for you:

ingo at jache dot de ¶

10 years ago

I know this might look somewhat superfluous to others, but i once came across a situation where i needed a *strong* blur on an image without having ImageMagick installed. Executing the convolution-filter several times on the same image is awfully slow and still doesn't give a good blur.

The function below accepts a truecolor-image and a blur-factor between 0.0 and 1.0. Beware: It's still quite slow.

delabahan at gmail dot com ¶

5 years ago

This is an example of get high resolution images.

jeff at lushmedia dot com ¶

18 years ago

I wrote an online overview of the image functions that people might find useful. In addition to a general overview of the various function categories and code samples, I have included many interactive examples of the functions, allowing viewers to experiment with the parameters, and seeing the results in real time. The presentation is located at New York PHP
//www.nyphp.org/content/presentations/GDintro/

ph_corp at yahoo dot fr ¶

14 years ago

mpyw ¶

5 years ago

This is an example of black-and-white imagebmp[] implementation.