url读取过程---图片缩放

url

https://three.api.skinrun.me/web/index/imgs?w=500&h=500&url={$goodsInfo['thumbs']}

调用截取函数

public function imgs(){

  $url = $_GET['url'];

  $width = $_GET['w'];

  $height = $_GET['h'];

  imageResizer($url,$width,$height);

}

function imageResizer($url, $width, $height)

{

  $imgType = pathinfo($url, PATHINFO_EXTENSION);

  if ($imgType == 'png')

{

      header('Content-Type: image/png');

  } else

  {

      header('Content-Type: image/jpeg');

  }

  list($width_orig, $height_orig) = getimagesize($url);

  $ratio_orig = $width_orig / $height_orig;

  if ($width / $height > $ratio_orig)

{

      $width = $height * $ratio_orig;

  } else

  {

      $height = $width / $ratio_orig;

  }

  $image_p = imagecreatetruecolor($width, $height);

  $image = imagecreatefromjpeg($url);

  if (!$image)

{

      $image = imagecreatefrompng($url);

  }

  imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);

  if ($imgType == 'png')

{

      imagepng($image_p);

  } else

  {

      imagejpeg($image_p);

  }

}

注意：开启GD库