Parsing the set of commonly used image image functions in PHP

gd_info function: Get information about the currently installed GD library
getimagesize function: Get the size of the image
image_type_to_extension function: Get the file suffix of the image type
image_type_to_mime_type function: Determine the MIME type of an IMAGETYPE constant
image2wbmp function: Output the image to a browser or file in WBMP format
imagealphablending function: Set the color mixing mode of the image
imageantialias function: Whether to use the antialias (anti-aliasing) function
imagearc function: Draw an ellipse Arc
imagechar function: draw a character horizontally
imagecharup function: draw a character vertically
imagecolorallocate function: assign color to an image
imagecolorallocatealpha function: assign color+alpha to an image　
imagecolorat function: Get the color index value of a certain pixel
imagecolorclosest function: Get the index value of the color closest to the specified color
imagecolorclosestalpha function: Get the index value of the color closest to the specified color plus transparency
imagecolorclosesthwb function: Get the black and white index of the chroma closest to the specified color
imagecolordeallocate function: Cancel the allocation of the image color
imagecolorexact function: Get the index value of the specified color
imagecolorexactalpha function: Get the specified color Add transparency index value
imagecolormatch function: Make the palette version of the color in an image more closely match the true color version
imagecolorresolve function: Get the index value of the specified color or the closest possible replacement value
imagecolorresolvealpha function: Get the index value of the specified color transparency or the closest alternative value possible
imagecolorset function: set the color for the specified palette index
imagecolorsforindex function: get the color of a certain index
imagecolorstotal function: get the number of colors in the palette of an image
imagecolortransparent function: define a color as a transparent color
imageconvolution function: apply for a 3*3 convolution matrix
imagecopy Function: Copy a part of the image
imagecopymerge function: Copy and merge a part of the image
imagecopymergegray function: Copy and merge a part of the image in grayscale
imagecopyresampled function: Resample copy a part of the image and resize
imagecopyresized function: copy part of the image and resize it
imagecreate function: create a new palette-based image

imagecreatefromgd2 function: Create a new image from a GD 2 file or URL
imagecreatefromgd2part function: Create a new image from a part of a given GD 2 file or URL
imagecreatefromgd function: Create a new image from a GD file or URL An image
imagecreatefromgif function: Create a new image from a GIF file or URL
imagecreatefromjpeg function: Create a new image from a JPEG file or URL
imagecreatefrompng function: Create a new image from a PNG file or URL
imagecreatefromstring function: Create a new image from the image stream in the string
imagecreatefromwbmp function: Create a new image from a WBMP file or URL
imagecreatefromxbm function: Create a new image from an XBM file or URL
imagecreatefromxpm function: From Create a new image in an XPM file or URL
imagecreatetruecolor function: create a new true color image
imagedashedline function: draw a dotted line
imagedestroy function: destroy an image
imageellipse function: draw an ellipse
imagefill Function: fill an area with the specified color
imagefilledarc function: draw an elliptical arc and fill it
imagefilledellipse function: draw an ellipse and fill it
imagefilledpolygon function: draw a polygon and fill it
imagefilledrectangle function: draw an Rectangle and fill it
imagefilltoborder function: fill the area to the boundary of the specified color
imagefilter function: use a filter on the image
imagefontheight function: get the font height
imagefontwidth function: get the font width
imageftbbox Function: Given a text box using FreeType2 font
imagefttext function: Write text to image using FreeType2 font
imagegammacorrect function: Apply gamma correction to GD image
imagegd2 function: Output GD 2 image to browser Browser or file
imagegd function: Output GD image to browser or file
imagegif function: Output image to browser or file in GIF format
imageinterlace function: Activate or disable interlacing
imageistruecolor Function: Check whether the image is a true color image
imagejpeg function: Output the image to a browser or file in JPEG format
imagelayereffect function: Set the alpha mixing flag to use the bound libgd layering effect
imageline Function: Draw a line segment
imageloadfont function: Load a new font
imagepalettecopy function: Copy the palette from one image to another
imagepng function: Output the image to the browser in PNG format Or file
imagepolygon function: draw a polygon
imagepsbbox function: give a text box using PostScript Type1 font
imagepsencodefont function: change the character encoding vector in the font
imagepsextendfont function: expand or simplify the font
imagepsfreefont function: release the memory occupied by a PostScript Type1 font
imagepsloadfont function: load a PostScript Type1 font from a file
imagepsslantfont function: tilt a certain font
imagepstext function: use PostScript Type1 font to convert text String is drawn on the image
imagerectangle function: Draws a rectangle
imagerotate function: Rotates the image with a given angle
imagesavealpha function: Sets the flag to save the complete alpha channel information when saving the PNG image
imagesetbrush function: Set the brush image for line drawing
imagesetpixel function: Draw a single pixel
imagesetstyle function: Set the style of line drawing
imagesetthickness function: Set the width of line drawing
imagesettile Function: Set the texture used for filling
imagestring function: Draw a line of string horizontally
imagestringup function: Draw a line of string vertically
imagesx function: Get the image width
imagesy function: Get the image Height
imagetruecolortopalette function: Convert true color image to palette image
imagettfbbox function: Get the range of text using TrueType font
imagettftext function: Write text to image using TrueType font
imagetypes function : Returns the image type supported by the current PHP version
imagewbmp function: Outputs the image to the browser or file in WBMP format
imagexbm function: Outputs the XBM image to the browser or file
iptcembed function: Converts the binary IPTC data is embedded in a JPEG image
iptcparse function: parses binary IPTC blocks into individual tags
jpeg2wbmp function: converts a JPEG image file to a WBMP image file
png2wbmp function: converts a PNG image file to WBMP Image files

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