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[PHP] 如何按比例缩放图片的尺寸 宽高 →→→→→进入此内容的聊天室

来自 , 2019-12-27, 写在 PHP, 查看 128 次.
URL http://www.code666.cn/view/f14bc21b
  1. <?php
  2. // The file
  3. $filename = 'test.jpg';
  4. $percent = 0.5;
  5. // Content type
  6. header('Content-Type: image/jpeg');
  7. // 计算新尺寸
  8. list($width, $height) = getimagesize($filename);
  9. $new_width = $width * $percent;
  10. $new_height = $height * $percent;
  11. // 重新采样
  12. $image_p = imagecreatetruecolor($new_width, $new_height);
  13. $image = imagecreatefromjpeg($filename);
  14. imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
  15. // Output
  16. imagejpeg($image_p, null, 100);
  17. ?>
  18.  

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