php - PHP从内存中的curl调整图像大小

Question

我正在尝试调整从 Curl 请求中获得的图像的大小，但我不想将其保存到文件中以调整其大小。这是我正在尝试，但不工作：

$ch = curl_init();
curl_setopt($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);

标签： phpimage

Answer 1

有效的是调整 $picture 的大小：

$image = 'data://application/octet-stream;base64,' . base64_encode($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;