PHP从内存中的curl调整图像大小
PHP从内存中的curl调整图像大小
提问于 2018-06-07 10:23:20
我正在尝试调整从Curl请求中获得的图像的大小，但我不想为了调整大小而将其保存到文件中。这就是我正在尝试的，但不起作用：
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $remote_file);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
$picture = curl_exec($ch);
$contentType = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
curl_close($ch);
// And then to resize $picture
$data = htmlspecialchars($picture, ENT_QUOTES);
$data = base64_decode($data);
$im = imagecreatefromstring($data);
$imaget1 = imagescale($im, $maxsize);回答 2
Stack Overflow用户
发布于 2018-06-15 07:26:09
以下是调整$picture大小的有效方法：
$image = 'data://application/octet-stream;base64,' . base64_encode($picture);
$mime = getimagesize($image);
if($mime['mime'] == 'image/jpeg'){ $imagecreated = imagecreatefromjpeg($image); }
if($mime['mime'] == 'image/jpg'){ $imagecreated = imagecreatefromjpeg($image); }
if($mime['mime'] == 'image/png'){ $imagecreated = imagecreatefrompng($image); }
if($mime['mime'] == 'image/gif'){ $imagecreated = imagecreatefromgif($image); }
$imageScaled = imagescale($imagecreated, $maxsize);
ob_start ();
if($mime['mime'] == 'image/jpeg'){ imagejpeg($imageScaled, null, $quality); }
if($mime['mime'] == 'image/jpg'){ imagejpeg($imageScaled, null, $quality); }
if($mime['mime'] == 'image/png'){ imagepng($imageScaled, null, "8"); }
if($mime['mime'] == 'image/gif'){ imagegif($imageScaled, null, $quality); }
$image = ob_get_contents ();
ob_end_clean ();
imagedestroy($imagecreated);
return $image;Stack Overflow用户
发布于 2019-12-03 05:46:55
我稍微修改了一下，并以这种方式使用它：
// --Take in curl data image and return base64 text image resized --
private function GenBase64Thumb($curl_image_data, $maxsize = 300, $quality = 85) {
$image = 'data://application/octet-stream;base64,' . base64_encode($curl_image_data);
$imagecreated = null;
$mime = getimagesize($image);
switch ($mime['mime']) {
case 'image/jpeg':
case 'image/jpg':
$imagecreated = imagecreatefromjpeg($image);
break;
case 'image/png':
$imagecreated = imagecreatefrompng($image);
break;
case 'image/gif':
$imagecreated = imagecreatefromgif($image);
break;
default:
return null;
}
if (!empty($imagecreated) && $imageScaled = imagescale($imagecreated, $maxsize)) {
ob_start();
switch ($mime['mime']) {
case 'image/jpeg':
case 'image/jpg':
imagejpeg($imageScaled, NULL, $quality);
break;
case 'image/png':
imagepng($imageScaled, NULL, "8");
break;
case 'image/gif':
imagegif($imageScaled, NULL, $quality);
break;
default:
return null;
}
$image = ob_get_contents();
ob_end_clean();
imagedestroy($imagecreated);
return !empty($image) ? base64_encode($image) : null;
}
return null;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50732124
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