Parsing common image function sets in php

This article provides a detailed analysis of common image function sets in php. For more information, see gd_info function: obtain information about the currently installed GD Library.
Getimagesize function: obtains the image size.
Image_type_to_extension function: obtains the file suffix of the image type.
Image_type_to_mime_type function: determines the MIME type of an IMAGETYPE constant.
Image2wbmp function: outputs an image to a browser or file in WBMP format.
Imagealphablending function: sets the mixed color mode of the image.
Imageantialias function: whether to use the antialias function
Imagearc function: draw an elliptical 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: obtains the color index value of a certain pixel.
Imagecolorclosest function: Gets the index value of the color closest to the specified color.
Imagecolorclosestalpha function: Gets the index value of the color closest to the specified color and transparency.
Imagecolorclosesthwb function: Gets the black-white index of the color closest to the specified color.
Imagecolordeallocate function: cancel image color allocation
Imagecolorexact: returns the index value of a specified color.
Imagecolorexactalpha function: Gets the index value of the specified color and transparency.
Imagecolormatch function: make the color of the color palette in an image more match with the real color version.
Imagecolorresolve function: Gets the index value of the specified color or the closest possible alternative value.
Imagecolorresolvealpha function: Gets the index value of the specified color transparency or the closest possible alternative value.
Imagecolorset function: set the color for the specified palette index
Imagecolorsforindex function: Gets the color of an index.
Imagecolorstotal function: gets the number of colors in the palette of an image.
Imagecolortransparent function: defines a color as transparent color.
Imageconvolution function: apply for a 3*3 convolution matrix
Imagecopy function: copy part of an image
Imagecopymerge function: copy and merge part of the image
Imagecopymergegray function: copies and merges a part of an image in grayscale mode.
Imagecopyresampled function: re-sample and copy part of the image and resize it
Imagecopyresized function: copy and resize some images
Imagecreate function: Creates a palette-based image.

Imagecreatefromgd2 function: create an image from the GD 2 file or URL.
Imagecreatefromgd2part function: creates an image from a part of a given GD 2 file or URL.
Imagecreatefromgd function: creates an image from the GD file or URL.
Imagecreatefromgif function: creates an image from a GIF file or URL.
Imagecreatefromjpeg function: creates an image from a JPEG file or URL.
Imagecreatefrompng function: creates an image from a PNG file or URL.
Imagecreatefromstring function: creates an image from the image stream in the string.
Imagecreatefromwbmp: creates an image from a WBMP file or URL.
Imagecreatefromxbm function: creates an image from an XBM file or URL.
Imagecreatefromxpm function: creates an image from an XPM file or URL.
Imagecreatetruecolor function: creates a true color image.
Imagedashedline function: draw a dotted line
Imagedestroy function: destroys an image.
Imageellipse function: draws an elliptic
Imagefill function: fill an area with the specified color
Imagefilledarc function: draw an elliptical arc and fill it
Imagefilledellipse function: draws an ellipse and fills it
Imagefilledpolygon function: draw a polygon and fill it
Imagefilledrectangle function: draws and fills a rectangle.
Imagefilltoborder function: fill the area to the border of the specified color
Imagefilter function: filter images
Imagefontheight function: Get the font height
Imagefontwidth function: obtains the font width.
Imageftbbox function: displays a text box in FreeType2.
Imagefttext function: use FreeType2 to write text to the image
Imagegammacorrect function: apply gamma correction to GD images
Imagegd2 function: outputs the GD 2 image to a browser or file.
Imagegd function: outputs GD images to browsers or files.
Imagegif function: outputs an image to a browser or file in GIF format.
Imageinterlace function: Enables or disables interlace scanning.
Imageistruecolor function: checks whether the image is true or not.
Imagejpeg function: outputs an image to a browser or file in JPEG format.
Imagelayereffect function: Set the alpha color mixing sign to use the bound libgd layering effect.
Imageline function: draw a line segment
Imageloadfont function: load a new font
Imagepalettecopy function: copy a palette from one image to another
Imagepng function: outputs an image to a browser or file in PNG format.
Imagepolygon function: draw a polygon.
Imagepsbbox function: provides a text box that uses the PostScript Type1 font.
Imagepsencodefont function: change the character encoding vector in the font.
Imagepsextendfont function: expanded or simplified font
Imagepsfreefont function: releases the memory occupied by a PostScript Type1 font.
Imagepsloadfont function: loads a PostScript Type1 font from a file.
Imagepsslantfont function: skew a certain font
Imagepstext function: draw a text string on the image using the PostScript Type1 font
Imagerectangle function: draws a rectangle.
Imagerotate function: Rotate an image from a given angle
Imagesavealpha function: sets the flag to save the complete alpha channel information when saving the PNG image.
Imagesetbrush function: Set the paint brush image for the draw line
Imagesetpixel function: draw a single pixel
Imagesetstyle function: sets the style of the draw line.
Imagesetthickness function: set the width of the draw line.
Imagesettile function: sets the texture for filling.
Imagestring function: draw a line of strings horizontally.
Imagestringup function: draw a line of strings vertically
Imagesx function: Get image width
Imagesy function: Get Image height
Imagetruecolortopalette function: convert a true color image to a color palette image
Imagettfbbox function: get the text range using the TrueType font
Imagettftext function: Use the TrueType font to write text to the image
Imagetypes function: returns the image types supported by the current PHP version.
Imagewbmp function: outputs an image to a browser or file in WBMP format.
Imagexbm function: outputs XBM images to browsers or files.
Iptcembed function: embedding binary IPTC data into a JPEG image
Iptcparse function: parses binary IPTC blocks into a single tag
Jpeg2wbmp function: converts a JPEG image file to a WBMP image file.
Png2wbmp function: convert a PNG image file to a WBMP image file