PHP将POST图像转换为PNG

我正在尝试将JPG（任何图像）转换为PNG。我有一个HTML表单，可以将图像发布到服务器上。我需要重命名该文件，并将其转换为PNG。稍后在代码中，在执行相关表数据库插入之后，我再次重命名该文件，以将记录ID附加到文件名中，以确保其唯一性

我更像是一个目标C程序员，而不是PHP程序员，所以我在这里努力编写我在其他问题中发现的代码，这些代码似乎不适合我

这里是

print\r（$\u文件）

Array（[image]=>Array（[name]=>BBnL9Ho.jpg[type]=>image/jpeg[tmp\u name]=>/tmp/phphhqHam[error]=>0[size]=>1636））

因此，我想将其转换为PNG，并将
BBnL9Ho.jpg重命名为image1.PNG
。我已尝试使用以下代码，但无效：

$newfileName = imagepng(imagecreatefromjpeg($_FILES['image']['tmp_name']), "image1.png");

稍后，在插入相关数据库表之后，我再次更改名称并附加相关数据库记录的ID（由于一对多关系，我将文件名存储在单独的表中，然后存储表单数据的其余部分）：

然后我将该名称插入正确输入的数据库。然后，我需要将文件移动到一个上载目录，我尝试这样做：

move_uploaded_file("$fileName",$dir . $fileName);

这就是我的问题所在。文件不移动，当我检查文件的属性时，似乎它实际上没有转换文件。我使用此选项检查类型：

$fileType = $_FILES["image"]["type"];

它仍然显示它是JPG。我肯定错过了一些非常明显的东西，但我希望能得到一些帮助

非常感谢。
使用以下脚本将任何图像（JPEG、PNG和GIF）转换为PNG格式。仔细阅读下面的脚本，我在每个关键步骤都添加了注释

// $dir specifies the directory where you upload your image files

// get the file by it's temporary name
$tmp_file_name = $_FILES['image']['tmp_name'];

// get the file extension
$ext = strtolower(pathinfo($_FILES['image']['name'], PATHINFO_EXTENSION));

// specify the whole path here
$actual_file_name = $dir . basename($_FILES['image']['name'], "." . $ext) . ".png";

// check whether a valid image is uploaded or not
if(getimagesize($tmp_file_name)){

    // get the mime type of the uploaded image
    $image_array = getimagesize($tmp_file_name);
    $mime_type = $image_array['mime'];

    // get the height and width of the uploaded image
    list($width_orig, $height_orig) = getimagesize($tmp_file_name);
    $width = $width_orig;
    $height = $height_orig;

    if($mime_type == "image/gif"){
        // create a new true color image
        if($image_p = imagecreatetruecolor($width, $height)){

            // create a new image from file
            if($image = imagecreatefromgif($tmp_file_name)){

                // copy and resize part of an image with resampling
                if(imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig)){

                    if(imagepng($image_p, $actual_file_name, 0)){
                        // image is successfully uploaded
                        // free resources
                        imagedestroy($image_p);
                        imagedestroy($image);

                        // perform the insert operation and get the last inserted id
                        // $lastinsertID = XXXX

                        // new file name
                        $filename = $dir . $lastinsertID . basename($_FILES['image']['name'], "." . $ext) . ".png";

                        //move the file to your desired location
                        if(rename($actual_file_name, $filename)){
                            echo "success";
                        }else{
                            echo "error";
                        }

                    }else{
                        //Destroy both image resource handler
                        imagedestroy($image);
                        imagedestroy($image_p);
                        echo "Error";
                    }
                }else{
                    //Destroy both image resource handlers
                    imagedestroy($image);
                    imagedestroy($image_p);
                    echo "Error";
                }
            }else{
                //destroy $image_p image resource handler
                imagedestroy($image_p);
                echo "Error";
            }
        }else{
            echo "Error";
        }
    }elseif($mime_type == "image/png"){
        // the uploaded image is already in .png format
        if(move_uploaded_file($tmp_file_name, $actual_file_name)){

            // perform the insert operation and get the last inserted id
            // $lastinsertID = XXXX

            // new file name
            $filename = $dir . $lastinsertID . $_FILES['image']['name'];

            //move the file to your desired location
            if(rename($actual_file_name, $filename)){
                echo "success";
            }else{
                echo "error";
            }

        }else{
            echo "error";
        }
    }elseif($mime_type == "image/jpeg"){
        // create a new true color image
        if($image_p = imagecreatetruecolor($width, $height)){

            // create a new image from file
            if($image = imagecreatefromjpeg($tmp_file_name)){

                // copy and resize part of an image with resampling
                if(imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig)){

                    if(imagepng($image_p, $actual_file_name, 0)){
                        // image is successfully uploaded
                        // free resources
                        imagedestroy($image_p);
                        imagedestroy($image);

                        // perform the insert operation and get the last inserted id
                        // $lastinsertID = XXXX

                        // new file name
                        $filename = $dir . $lastinsertID . basename($_FILES['image']['name'], "." . $ext) . ".png";

                        //move the file to your desired location
                        if(rename($actual_file_name, $filename)){
                            echo "success";
                        }else{
                            echo "error";
                        }

                    }else{
                        //Destroy both image resource handler
                        imagedestroy($image);
                        imagedestroy($image_p);
                        echo "Error";
                    }
                }else{
                    //Destroy both image resource handlers
                    imagedestroy($image);
                    imagedestroy($image_p);
                    echo "Error";
                }
            }else{
                //destroy $image_p image resource handler
                imagedestroy($image_p);
                echo "Error";
            }
        }else{
            echo "error_An unexpected error has been occured. Please try again later.";
        }
    }else{
        echo "Only JPEG, PNG and GIF images are allowed.";
    }

}else{
    echo "Bad image format";
}   

哇，太棒了！非常感谢。我将致力于实施，并会回复您。非常感谢你！我可能要花几天时间才能恢复原状。@Eynol先生，不客气。让我知道进展情况。好吧，我试了一下，它走得更远了。它将图像转换为PNG！！：）。它还将新图像名称存储在数据库中，但它已将我希望将其移动到的目录名附加到数据库中的文件名。此外，它没有将文件移动到我的$dir位置。最后，我希望生成的图像是（lastinsertID）image1.png（例如12345image1.png）。@mreynol您可以这样做，
$lastinsertID。basename（$actual_file_name）
获取更新的文件名。@mreynol如果我是你，我会创建一个生成随机数的函数。当用户上传多张图片时，我会为每张图片加上一个随机数，并加上一个简单的文件名，
random\u number。“image.png”
并在数据库中插入新文件名（
随机数。“image.png”
）。这样，它将确保独特性。
// $dir specifies the directory where you upload your image files

// get the file by it's temporary name
$tmp_file_name = $_FILES['image']['tmp_name'];

// get the file extension
$ext = strtolower(pathinfo($_FILES['image']['name'], PATHINFO_EXTENSION));

// specify the whole path here
$actual_file_name = $dir . basename($_FILES['image']['name'], "." . $ext) . ".png";

// check whether a valid image is uploaded or not
if(getimagesize($tmp_file_name)){

    // get the mime type of the uploaded image
    $image_array = getimagesize($tmp_file_name);
    $mime_type = $image_array['mime'];

    // get the height and width of the uploaded image
    list($width_orig, $height_orig) = getimagesize($tmp_file_name);
    $width = $width_orig;
    $height = $height_orig;

    if($mime_type == "image/gif"){
        // create a new true color image
        if($image_p = imagecreatetruecolor($width, $height)){

            // create a new image from file
            if($image = imagecreatefromgif($tmp_file_name)){

                // copy and resize part of an image with resampling
                if(imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig)){

                    if(imagepng($image_p, $actual_file_name, 0)){
                        // image is successfully uploaded
                        // free resources
                        imagedestroy($image_p);
                        imagedestroy($image);

                        // perform the insert operation and get the last inserted id
                        // $lastinsertID = XXXX

                        // new file name
                        $filename = $dir . $lastinsertID . basename($_FILES['image']['name'], "." . $ext) . ".png";

                        //move the file to your desired location
                        if(rename($actual_file_name, $filename)){
                            echo "success";
                        }else{
                            echo "error";
                        }

                    }else{
                        //Destroy both image resource handler
                        imagedestroy($image);
                        imagedestroy($image_p);
                        echo "Error";
                    }
                }else{
                    //Destroy both image resource handlers
                    imagedestroy($image);
                    imagedestroy($image_p);
                    echo "Error";
                }
            }else{
                //destroy $image_p image resource handler
                imagedestroy($image_p);
                echo "Error";
            }
        }else{
            echo "Error";
        }
    }elseif($mime_type == "image/png"){
        // the uploaded image is already in .png format
        if(move_uploaded_file($tmp_file_name, $actual_file_name)){

            // perform the insert operation and get the last inserted id
            // $lastinsertID = XXXX

            // new file name
            $filename = $dir . $lastinsertID . $_FILES['image']['name'];

            //move the file to your desired location
            if(rename($actual_file_name, $filename)){
                echo "success";
            }else{
                echo "error";
            }

        }else{
            echo "error";
        }
    }elseif($mime_type == "image/jpeg"){
        // create a new true color image
        if($image_p = imagecreatetruecolor($width, $height)){

            // create a new image from file
            if($image = imagecreatefromjpeg($tmp_file_name)){

                // copy and resize part of an image with resampling
                if(imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig)){

                    if(imagepng($image_p, $actual_file_name, 0)){
                        // image is successfully uploaded
                        // free resources
                        imagedestroy($image_p);
                        imagedestroy($image);

                        // perform the insert operation and get the last inserted id
                        // $lastinsertID = XXXX

                        // new file name
                        $filename = $dir . $lastinsertID . basename($_FILES['image']['name'], "." . $ext) . ".png";

                        //move the file to your desired location
                        if(rename($actual_file_name, $filename)){
                            echo "success";
                        }else{
                            echo "error";
                        }

                    }else{
                        //Destroy both image resource handler
                        imagedestroy($image);
                        imagedestroy($image_p);
                        echo "Error";
                    }
                }else{
                    //Destroy both image resource handlers
                    imagedestroy($image);
                    imagedestroy($image_p);
                    echo "Error";
                }
            }else{
                //destroy $image_p image resource handler
                imagedestroy($image_p);
                echo "Error";
            }
        }else{
            echo "error_An unexpected error has been occured. Please try again later.";
        }
    }else{
        echo "Only JPEG, PNG and GIF images are allowed.";
    }

}else{
    echo "Bad image format";
}