GD and Image Functions

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
• 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 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
• 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
• 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
• 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
• 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 libgd layering effects
• imageline — Draw a line
• imageloadfont — Load a new font
• 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
• 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
• 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 an 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