Php 将图像上载到tmp文件夹时出现问题，请调整大小，然后上载到S3 bucket

我花了一整天的时间来研究如何在tmp中存储一个图像，改变它的大小，然后将它上传到我的S3存储桶中。S3存储桶工作正常，我可以在不调整大小的情况下上传图像。resize函数是createThumbnail函数，如果不与S3结合使用，可能是因为它的格式错误或其他原因。第二个文件“init.php”包含所有函数。图像被上传到临时文件夹，但当我运行脚本时，它在调整大小后不会被上传。我没有在本地主机上获得任何错误日志，当我将代码上传到AWS实例时，它只返回一个内部服务器错误，但实例中的错误日志奇怪地为空。。。我需要对这个问题有一些新的看法

banner_image.php

    <?php 
include "init.php";

if (@session($_SESSION["buddy"])){

    $valid_file_formats = array("jpg","png","jpeg");
    if(isset($_POST) and $_SERVER['REQUEST_METHOD'] == "POST" && !empty($_FILES['banner_image']['tmp_name']) && !empty($_FILES['banner_image']['name'])){

        $folder = usernameFromEmail($_SESSION["user"]); // session based on users email
        $buddy = $_SESSION["user"];

        $name = $_FILES['banner_image']['name'];
        $size = $_FILES['banner_image']['size'];

        $path = $folder."/cover/"; // path to image folder
        $temp = explode(".", $name);
        $newfilenameKey = round(microtime(true)); // generating random file name
        $newfilename = $newfilenameKey . "." . "png"; // always using png

        if(strlen($newfilename) && strlen($name)) {
            $ext = explode(".", $name);
            $ext = end($ext);
            if(in_array($ext,$valid_file_formats)) { // valid file format array check
                if($size<=(10485760)) { // size check in bits

                    $tmp = $_FILES['banner_image']['tmp_name'];
                    $file_name = $path.$newfilename; // full path including file name

                    if(putS3IMG($bucket, $file_name, $tmp)){ // upload untouched image to S3 bucket
                        list($width, $height) = getimagesize($tmp); 

                        $type = 2;

                        $w = 300;
                        $h = 300 * ($height / $width);
                        // getting new dimensions for the new image

                        if(createThumbnail(1,$tmp,$w,$h,$path,$file_name) == 1){ // function for smaller image
                            return json_encode(array("succ" => 1));
                        }
                    }
                }
            }
        }
    } 
}

?>

下面是包含我的函数的banner_image.php文件中包含的init.php文件

     <?php

    // connection to S3Client .... $client


    function createThumbnail($type,$image_name,$new_width,$new_height,$uploadDir,$moveToDir){
        global $bucket;
        //$type: defines the name of the new file
        //image_name: tmp name
        //uploadDir: path 
        //moveToDir: files new path incl. file name


        $mime = getimagesize($image_name);

            if($mime['mime']=='image/png') { 
                $src_img = imagecreatefrompng($image_name);
            } else if($mime['mime']=='image/jpg' || $mime['mime']=='image/jpeg' || $mime['mime']=='image/pjpeg') {
                $src_img = imagecreatefromjpeg($image_name);
            }   

        $old_x      =   imageSX($src_img);
        $old_y      =   imageSY($src_img);
        $thumb_w    =   $new_width;
        $thumb_h    =   $new_height;
        $dst_img    =   ImageCreateTrueColor($thumb_w,$thumb_h);

        $background = imagecolorallocate($dst_img, 0, 0, 0);
        imagecolortransparent($dst_img, $background);

        imagealphablending($dst_img, false);
        imagesavealpha($dst_img, true);

        imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y); 

        $image_name_new = explode(".", $moveToDir);

            if ($type == 1){
                $new_image_name = $image_name_new[0] . "_thumb." . $image_name_new[1];
            } else if ($type == 2){
                $new_image_name = $image_name_new[0] . "_image." . $image_name_new[1];
            }
            $tmpPath = tempnam(sys_get_temp_dir(), $new_image_name); // getting temporary directory 

            if($mime['mime']=='image/png') {
                imagepng($dst_img,$tmpPath,8);
            } else if($mime['mime']=='image/jpg' || $mime['mime']=='image/jpeg' || $mime['mime']=='image/pjpeg') {
                imagejpeg($dst_img,$tmpPath,80);
            }

        imagedestroy($dst_img); 
        imagedestroy($src_img);

        if(putS3IMG($bucket, $image_name, $tmpPath)){ // this part does not work
            return 1;
        } else {
            return 2;
        }

    }




    function putS3IMG($bucket, $file_name, $tmp){ // function uploading to my bucket
        //file_name is with directories
        //tmp is $_FILES tmp_name
        global $client;
        $result = $client->putObject([
            'Bucket' => $bucket,
            'Key'    => $file_name,
            'SourceFile' => $tmp
        ]);
        if ($result){
            return true;
        }
        return false;
    }

---

旁注：这听起来像是使用AWS Lambda的绝佳选择。您可以将AmazonS3事件配置为在文件上载到AmazonS3时触发AWS Lambda函数。Lambda函数可以从S3下载图像，调整其大小，然后将其上载到S3中的新目标。所有这些都可以无服务器运行，这意味着它是按需运行的。例如，请参阅：@JohnRotenstein谢谢你，伙计！！正是我所需要的，仅供参考，您的两行
imagedestroy（）
将永远不会运行，因为您在there@phil注意到并改变了。。。