dpjo15650 2017-03-21 11:12
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PHP从url增加图像分辨率然后裁剪

I have images with resolution of 720x1280 and I would need to store them on server with resolution 800x1500. Since 720x1280 increased to height 1500 gives resolution of 844x1500 I would also need to crop image, remove 22 pixels from the left and right side.

For now I have this:

$img_url = file_get_contents($url);

$img = imagecreatefromstring($img_url);

$width = imagesx($img);
$height = imagesy($img);

$new_width = '800';
$new_height = '1500';

$thumb = imagecreatetruecolor($new_width, $new_height);

imagecopyresampled($thumb, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

imagejpeg($thumb, $name, 100);

imagedestroy($thumb);
imagedestroy($img);

But the problem is that image is not cropped, 22 pixels from the left and right side are not removed.

Is there a way to do this, to first increase image resolution from url and then crop?

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2条回答 默认 最新

  • du521521521 2017-03-21 11:57
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    Googling php image crop reveals the secret:

    $rect = [22, 0, 800, 1500]
    $thumb = imagecrop($thumb, $rect)
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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