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XLI. Image functions

You can use the image functions in PHP to get the size of JPEG, GIF, PNG, and SWF images, and if you have the GD library (available at http://www.boutell.com/gd/) 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 support png, not gif.

In order to read and write images in jpeg format, you will need to obtain and install jpeg-6b (available at ftp://ftp.uu.net/graphics/jpeg/), and then recompile gd to make use of jpeg-6b. You will also have to compile PHP with --with-jpeg-dir=/path/to/jpeg-6b.

To add support for Type 1 fonts, you can install t1lib (available at ftp://sunsite.unc.edu/pub/Linux/libs/graphics/), and then add --with-t1lib[=dir].

Table of Contents

GetImageSize -- Get the size of an image

Image2WBMP -- Output image to browser or file

ImageAlphaBlending -- Set the blending mode for an image

ImageArc -- Draw a partial ellipse

ImageFilledArc -- Draw a partial ellipse and fill it

ImageEllipse -- Draw an ellipse

ImageFilledEllipse -- Draw a filled ellipse

ImageChar -- Draw a character horizontally

ImageCharUp -- Draw a character vertically

ImageColorAllocate -- Allocate a color for an image

ImageColorDeAllocate --  De-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

ImageColorClosestThwb --  Get the index of the color which has the hue, white and blackness nearest to the given color

ImageColorExact -- Get the index of the specified color

ImageColorExactAlpha -- Get the index of the specified color + alpha

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

ImageGammaCorrect --  Apply a gamma correction to a GD image

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

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

ImageCopyResized -- Copy and resize part of an image

ImageCopyResampled -- Copy and resize part of an image with resampling

ImageCreate -- Create a new palette based image

ImageCreateTrueColor -- Create a new TRUE color image

ImageTrueColorToPalette -- Convert a TRUE color image to a palette image

ImageCreateFromGD --  Create a new image from GD 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

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

ImageCreateFromWBMP -- Create a new image from file or URL

ImageCreateFromString -- Create a new image from the image stream in the string

ImageCreateFromXBM -- Create a new image from file or URL

ImageCreateFromXPM -- Create a new image from file or URL

ImageDashedLine -- Draw a dashed line

ImageDestroy -- Destroy an image

ImageFill -- Flood fill

ImageFilledPolygon -- Draw a filled polygon

ImageFilledRectangle -- Draw a filled rectangle

ImageFillToBorder -- Flood fill to specific color

ImageFontHeight -- Get font height

ImageFontWidth -- Get font width

ImageGD --  Output GD image to browser or file

ImageGD2 --  Output GD2 image to browser or file

ImageGIF -- Output image to browser or file

ImagePNG --  Output a PNG image to either the browser or a file

ImageJPEG -- Output image to browser or file

ImageWBMP -- Output image to browser or file

ImageInterlace -- Enable or disable interlace

ImageLine -- Draw a line

ImageLoadFont -- Load a new font

ImagePaletteCopy -- Copy the palette from one image to another

ImagePolygon -- Draw a polygon

ImagePSBBox --  Give the bounding box of a text rectangle using PostScript Type1 fonts

ImagePSEncodeFont --  Change the character encoding vector of a font

ImagePSFreeFont -- Free memory used by a PostScript Type 1 font

ImagePSLoadFont -- Load a PostScript Type 1 font from file

ImagePsExtendFont --  Extend or condense a font

ImagePsSlantFont --  Slant a font

ImagePSText --  To draw a text string over an image using PostScript Type1 fonts

ImageRectangle -- Draw a rectangle

ImageSetPixel -- Set a single pixel

ImageSetBrush -- Set the brush image for line drawing

ImageSetStyle -- Set the style for line drawing

ImageSetTile -- Set the tile image for filling

ImageSetThickness -- Set the thickness for line drawing

ImageString -- Draw a string horizontally

ImageStringUp -- Draw a string vertically

ImageSX -- Get image width

ImageSY -- Get image height

ImageTTFBBox --  Give the bounding box of a text using TypeType fonts

ImageFtBBox --  Give the bounding box of a text using fonts via freetype2

ImageTTFText --  Write text to the image using TrueType fonts

ImageFtText --  Write text to the image using fonts using FreeType 2

ImageTypes --  Return the image types supported by this PHP build

JPEG2WBMP --  Convert JPEG image file to WBMP image file

PNG2WBMP --  Convert PNG image file to WBMP image file

read_exif_data -- Read the EXIF headers from a JPEG

iptcembed --  Embed binary IPTC data into a JPEG image.

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