PHP image function set of images

This article collects some functions of the image operation in PHP, there is a brief description, the need for friends, you can refer to the next. A set of PHP image function sets, as follows: Gd_info function: Gets the information of the currently installed GD library getimagesize function: Gets the size of the image image_type_to_extension function: Gets the file suffix of the image type Image_type_to_mime_　Type function: Determine the MIME type of a ImageType constant image2wbmp function: Output an image in wbmp format to a browser or file Imagealphablending function: Set the image's color-blending mode　Imageantialias function: Whether to use AntiAlias (antialiasing) function Imagearc function: Draw Elliptical arc Imagechar function: Draw a character horizontally Imagecharup function: Draw a character vertically　Imagecolorallocate function: Assigns a color imagecolorallocatealpha function to an image: assigns a color +alpha Imagecolorat function to an image: Gets the color index value of a 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 IMAGECOLORCLOSESTHWB function: Gets the black-white index closest to the specified color　Imagecolordeallocate function: Cancels the allocation of the image color Imagecolorexact function: Gets the index value of the specified color Imagecolorexactalpha function: Gets the index value of the specified color plus transparency Imagecolormatch function: To make the color of the palette version in an image match the true-color version of the Imagecolorresolve function: Gets the index value of the specified color or the closest alternative value possible Imagecolorresolvealpha function: Gets the specified color transparency　Index value or possibly the nearest alternative value Imagecolorset function: Sets the color Imagecolorsforindex function for the specified palette index: 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 a transparent color imageconvolution function: Request a 3*3 convolution matrix imagecopy function: Copy part of an image Imagecopymerge function: Copy and merge part of an image Imagecopymergegray function: WithGrayscale copy and merge part of an image imagecopyresampled function: resample copy part of image and resize imagecopyresized function: Copy part of image and resize Imagecreate function: Create a new palette-based image IMAGECREATEFROMGD2 function: Create a new image from the GD 2 file or URL Imagecreatefromgd2part function: from the given GD 2 file or part of a URL create a new image IMAGECREATEFROMGD function: Create a new image from the gd file or URL imagecreatefromgif function: Create a new image from a GIF file or URL imagecreatefromjpeg function: from a JPEG file or create a new image in the 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: From wbmp file or URL Create a new image in the IMAGECREATEFROMXBM function: Create a new image from the xbm file or URL imagecreatefromxpm function: Create a new image from the xpm file or URL Imagecreatetruecolor function: Create a new true color image imaged Ashedline function: Draw a dashed line Imagedestroy function: Destroy an image Imageellipse function: Draw an ellipse Imagefill function: Fills an area Imagefilledarc function with the specified color: Draw an elliptical arc and fill the Imagefilledell Ipse function: Draw an ellipse and fill the Imagefilledpolygon function: Draw a polygon and fill the Imagefilledrectangle function: Draw a rectangle and fill the Imagefilltoborder function: The area is filled to the boundary of the specified color ImageFilter Function: Use filter imagefontheight function for Image: Get font height imagefontwidth function: Gets the font width imageftbbox function: Gives a text box Imagefttext function using FreeType2 font: Use FreeType2 font to Text Write image Imagegammacorrect function: Apply gamma correction imagegd2 function to GD Image: Will GD 2 image output to browser or file Imagegd function: Output GD image to browser or file Imagegif function: Output image to browser or file Imageinterlace function in GIF format: Activate or disable interlaced Imageistruecolor function: Check whether the image is a true color map Like the imagejpeg function: output images in JPEG format toBrowser or file Imagelayereffect function: Sets the alpha process color flag to use the bound LIBGD layered effect imageline function: Draw a segment Imageloadfont function: Load a new font imagepalettecopy function: Copy the palette from an image To another imagepng function: Output the image in PNG format to the browser or file Imagepolygon function: Draw a polygon Imagepsbbox function: Give a PostScript Type1 text box Imagepsencodefont function: Change the character encoding vector imagepsextendfont function in the font: Expand or refine the font Imagepsfreefont function: Release a PostScript Type1 memory Imagepsloadfont function: Load a PostScript Type1 font Imagepsslantfont function from a file: Tilt a font imagepstext function: PostScript Type1 font to draw a text string on an image Imagerectangle function: Draw a rectangle imagerotate function: Rotate the image Imagesavealpha function with a given angle: Set the marker to save the full alpha channel information when the PNG image is saved Imagesetbrush　Function: Sets the brush image for drawing lines 　Imagesetpixel function: Draw a single pixel Imagesetstyle function: Set the style of the line imagesetthickness function: Set the width of the line imagesettile function: Set the map imagestring function for filling: Draw a line of string horizontally　Imagestringup function: To draw a line of strings vertically imagesx function: Get image width Imagesy function: Get image height Imagetruecolortopalette function: Convert true color image to palette image　Imagettfbbox function: Get the range of text using TrueType fonts Imagettftext function: Writing text to an image with TrueType fonts　Imagetypes function: Returns the image type supported by the current PHP version imagewbmp function: Output the image to a browser or file IMAGEXBM function in wbmp format: Export the XBM image to a browser or file iptcembed function: Embeds binary IPTC data into a JPEG image iptcparse function: Resolves a binary IPTC block to a single tag JPEG2WBMP function: Convert a JPEG image file to a wbmp image file Png2wbmp function: Convert a PNG image file to a wbmp image file

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