Add a circle logo icon to the PHP implementation background map

This article mainly introduces the PHP implementation of the background map to add a circular logo icon method, combined with the case of a more detailed analysis of the PHP background map to add logo icon operation and specific implementation skills, the need for friends can refer to the next

Say the steps:

A total of 3 steps:

1. Compress the logo into a fixed-size square image
2. Turn the logo into a circular logo
3. Merge the logo with the background map

Nonsense not much to say, directly on the code:

<?php/** * Author: Friker * Development time: 20160516 * Function: Image processing * */class Imagecontroller extends ci_controller{public function __cons    Truct () {parent::__construct ();    Date_default_timezone_set (' Asia/shanghai ');    Error_reporting (e_all&~e_notice&~e_warning);  $this->load->library (' curl ');    }/** * @todo: This function is used to compress the square picture * and then cut into a circle to make the logo * and the background image merge * @return return URL */Public Function index () {    Avatar $headimgurl = ' a.jpg ';    Background image $bgurl = './aa.png ';    $imgs [' dst '] = $bgurl;    The first step compresses the picture $imggzip = $this->resize_img ($headimgurl);    The second step cuts into rounded pictures $imgs [' src '] = $this->test ($imggzip);  The third step merges the picture $dest = $this->mergerimg ($IMGS); The Public Function resize_img ($url, $path = './') {$imgname = $path. Uniqid ().    JPG ';    $file = $url; List ($width, $height) = getimagesize ($file);    Get the original size $percent = (110/$width);    Scaled size $newwidth = $width * $percent;    $newheight = $height * $percent; $src _im = Imagecreatefromjpeg ($file);    $DST _im = Imagecreatetruecolor ($newwidth, $newheight);    Imagecopyresized ($dst _im, $src _im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); Imagejpeg ($dst _im, $imgname);    Output compressed picture Imagedestroy ($dst _im);    Imagedestroy ($src _im);  return $imgname; $dest _path = $path. Uniqid ().    PNG ';    $SRC = imagecreatefromstring (file_get_contents ($original _path));    $newpic = Imagecreatetruecolor ($w, $h);    Imagealphablending ($newpic, false);    $transparent = Imagecolorallocatealpha ($newpic, 0, 0, 0, 127);    $r = $w/2;        for ($x =0; $x < $w; $x + +) for ($y =0; $y < $h; $y + +) {$c = Imagecolorat ($src, $x, $y);        $_x = $x-$w/2;        $_y = $y-$h/2;        if ((($_x*$_x) + ($_y*$_y)) < ($R * $r)) {Imagesetpixel ($newpic, $x, $y, $c);        }else{Imagesetpixel ($newpic, $x, $y, $transparent); }} imagesavealpha ($newpic, True);    Header (' content-type:image/png ');    Imagepng ($newpic, $dest _path);    Imagedestroy ($newpic);    Imagedestroy ($SRC);    Unlink ($url);  return $dest _path; }//php Merge Picture public function mergerimg ($imgs, $path = './') {$imgname = $path. Rand (1000,9999). Uniqid ().    JPG ';    List ($max _width, $max _height) = getimagesize ($imgs [' DST ']);    $dests = Imagecreatetruecolor ($max _width, $max _height);    $DST _im = imagecreatefrompng ($imgs [' DST ']);    Imagecopy ($dests, $dst _im,0,0,0,0, $max _width, $max _height);    Imagedestroy ($dst _im);    $src _im = imagecreatefrompng ($imgs [' src ']);    $src _info = getimagesize ($imgs [' src ']);    Imagecopy ($dests, $src _im,270,202,0,0, $src _info[0], $src _info[1]);    Imagedestroy ($src _im);    Var_dump ($imgs); exit;    Header ("Content-type:image/jpeg");    Imagejpeg ($dests, $imgname);    Unlink ($imgs [' DST ']);    Unlink ($imgs [' src ']);  return $imgname; }}

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