Php: Create an instance of a circular user avatar _ custom encapsulation class source code, circular user avatar

Php: Create an instance of a circular user avatar _ custom encapsulation class source code, circular user avatar

Ideas

Three image layers must be created for the layer design.

1. Bottom Layer: The final generated image

2. Real user profile pictures: real profile pictures uploaded by users as intermediate layers

3. Circular mask: as the top layer, draw a circular area in the mask and set it to transparent.

The Code is as follows:

Main function class avatar. class. php

<? Phpclass avatar {private $ fileName; // absolute path of the file (or relative path of the final called file) private $ rgb; // color index (array (255,255, 0) or hexadecimal value ffff00/# ffff00/ff0/# ff0) private $ size; // image size private $ imgInfo; // image information/*** initialize * Enter description here... * @ param string $ absolute path of the fileName file (or relative path of the final called file) * @ param mixed $ rgb color index (array (255,255, 0) or the hexadecimal value ffff00/# ffff00/ff0/# ff0) * @ param int $ size image size */public function _ constr Uct ($ fileName, $ rgb, $ size) {$ this-> fileName = $ fileName; if (is_array ($ rgb) {$ this-> rgb = $ rgb; // rgb color array (255,255, 0)} else {// some people like to carry # $ rgb = trim ($ rgb ,'#'); // processing abbreviation form if (strlen ($ rgb) = 3) {$ _ tmp = $ rgb [0]. $ rgb [0]. $ rgb [1]. $ rgb [1]. $ rgb [2]. $ rgb [2]; $ rgb =$ _ tmp;} $ this-> rgb = $ this-> createRGB ($ rgb ); // hexadecimal value ffff00} $ this-> size = $ size; $ this-> imgInfo = getimagesize ($ this-> fileName); if (! $ This-> imgInfo) {throw Exception ("unable to read image files");} if (! In_array ($ this-> imgInfo [2], array (2, 3) {// only jpg and png throw Exception ("image format not supported ");}} /*** display image ** Enter description here... */public function show () {header ("content-type: image/png"); $ shadow = $ this-> createshadow (); // mask image // create a square image $ imgbk = imagecreatetruecolor ($ this-> size, $ this-> size ); // switch the target image ($ this-> imgInfo [2]) {case 2: $ imgfk = imagecreatefromjpeg ($ this-> fileName); // the original image break; Case 3: $ imgfk = imagecreatefrompng ($ this-> fileName); // default: return; break ;} $ realSize = $ this-> imgInfo [0] <$ this-> imgInfo [1]? $ This-> imgInfo [0]: $ this-> imgInfo [1]; imagecopyresized ($ imgbk, $ imgfk, 0, 0, 0, 0, $ this-> size, $ this-> size, $ realSize, $ realSize); imagecopymerge ($ imgbk, $ shadow, 0, 0, 0, 0, $ this-> size, $ this-> size, 100); // create an image imagepng ($ imgbk); // destroy the resource imagedestroy ($ imgbk); imagedestroy ($ imgfk ); imagedestroy ($ shadow);}/*** create a circular mask * Enter description here... * @ param array 10 hexadecimal color array */private function cr Eateshadow () {$ img = imagecreatetruecolor ($ this-> size, $ this-> size); imageantialias ($ img, true ); // enable anti-aliasing $ color_bg = imagecolorallocate ($ img, $ this-> rgb [0], $ this-> rgb [1], $ this-> rgb [2]); // background color $ color_fg = imagecolorallocate ($ img, 0, 0); // foreground color, mainly used to create a circular imagefilledrectangle ($ img, 0, 0,200,200, $ color_bg ); imagefilledarc ($ img, 100,100,200,200, 0, 0, $ color_fg, IMG_ARC_PIE); imagecolortransp Arent ($ img, $ color_fg); // convert the foreground color to transparent return $ img ;} /*** convert the character form into a hexadecimal string * Enter description here... * @ param $ str */private function getIntFromHexStr ($ str) {$ format = '0123456789abcdef '; $ sum = 0; for ($ I = strlen ($ str)-1, $ c = 0, $ j = 0; $ I >=$ c; $ I --, $ j ++) {$ index = strpos ($ format, $ str [$ I]); // strpos is calculated from 0 $ sum + = $ index * pow (16, $ j);} return $ sum ;} /*** convert the hexadecimal color into a 10-hexadecimal color value array (RGB) * Enter description h Ere... * @ param $ str hexadecimal string (for example, ff9900) */private function createRGB ($ str) {$ rgb = array (); if (strlen ($ str )! = 6) {$ rgb [] = 0xff; $ rgb [] = 0xff; $ rgb [] = 0xff; return $ rgb; // default white} $ rgb [] = $ this-> getIntFromHexStr (substr ($ str, 0, 2 )); $ rgb [] = $ this-> getIntFromHexStr (substr ($ str, 2, 2); $ rgb [] = $ this-> getIntFromHexStr (substr ($ str, 4, 2); return $ rgb ;}}

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