Yii2想像PHP

Question

嘿，你们需要帮助。我使用ext yii2-imagine。我尝试将文件保存为质量=> 50，但无法正常工作。图像始终以质量=> 100保存。为什么会发生？

   $imagine = new Image();
    $photo = $imagine::getImagine()->open($this->uploadedFile->tempName);

    $width = $photo->getSize()->getWidth();
    $height = $photo->getSize()->getHeight();

    if (($width >= $this->width) || ($height >= $this->height)) {
        $photo->thumbnail(new Box($this->width, $this->height))->save($this->uploadedFile->tempName, ['quality' => 50]);
    }

Answer 1

您应该使用jpeg_quality选项：

$photo->thumbnail(new Box($this->width, $this->height))
     ->save($this->uploadedFile->tempName, ['jpeg_quality' => 50]);

请参阅documentation中的示例。

Answer 2

根据documentation of imagine，您可以为jpeg设置'jpeg_quality'设置，为png设置'png_compression_level'。您可以尝试以下方法：

    $options = [];
    switch (exif_imagetype($this->uploadedFile->tempName)) {
        case IMAGETYPE_PNG:
            $options = ['png_compression_level' => 9];
            break;
        case IMAGETYPE_JPEG:
            $options = ['jpeg_quality' => 50];
            break;
        default:
            throw new \Exception('Unsupported format');
    }
    $photo->thumbnail(new Box($this->width, $this->height))->save($this->uploadedFile->tempName, $options);