How to add a circular logo icon to the background image of PHP _php tips

This article illustrates the method of adding a circular logo icon to the background map of PHP. Share to everyone for your reference, specific as follows:

Say the steps:

A total of 3 steps:

1. Compressed logo into a fixed size square picture
2. Turn the logo into a circular logo
3. Combine logo with background image

Nonsense not much to say, directly on the code:

<?php/** * Author: Friker * Development time: 20160516 * Function: Image processing * * */class Imagecontroller extends ci_controller{public functi
    On __construct () {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 a square image and then cut it into a circle to make a logo * with the background image merge * @return return URL/Public Function ind
    Ex () {//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 is to cut into fillet picture $imgs [' src '] = $this->test ($imggzip);
  Third step merge 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);
    Scale 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 $imgname;
    ///First step to generate fillet picture public function test ($url, $path = './') {$w = =110 $h Original size $original _path= $url; $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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I hope this article will help you with the PHP program design.