php文件图片上传验证

Question

   clearstatcache();
    if($_FILES['images']){
        if ($_FILES['images']['error'] !== UPLOAD_ERR_OK) {
               $error[] = "Upload failed with error code " . $_FILES['images']['error'];                                
       }

        $info = getimagesize($_FILES['images']['tmp_name']);
        if ($info === FALSE) {
           $error[] = "Unable to determine image type of uploaded file";
        }

        if (($info[2] !== IMAGETYPE_GIF) && ($info[2] !== IMAGETYPE_JPEG) && ($info[2] !== IMAGETYPE_PNG)) {
                $error[] = "Not a gif/jpeg/png";
        }
        if ($_FILES["images"]["size"] > 100000) {//1mb limit
        $error[] = "Sorry, your file is too large.";
        }
}

这是我的 php 代码。检查文件是否为空。而且我要。如果文件存在，则 php 将检查文件图像。但是如果用户没有选择图像。验证将忽略它。我无法调试它。如果我没有选择图像代码仍然验证和错误说Warning: getimagesize(): Filename cannot be empty in C:\xampp\htdocs\savings\LiveUpdate.php on line 10

Answer 1

您没有发布您的 html，但名称 images 表明您进行了多次上传。

您应该指定数组的元素。让我说[0]。查看更多文档：http://php.net/manual/en/features.file-upload.multiple.php

像这样更改你的代码（参见添加的else，因为如果你的上传失败，你只需要得到错误！）

clearstatcache();

if(is_array($_FILES['images'])){
    if ($_FILES['images']['error'][0] !== UPLOAD_ERR_OK) {
       $error[] = "Upload failed with error code " . $_FILES['images']['error'][0];                                
    }
    else {
        $info = getimagesize($_FILES['images']['tmp_name'][0]);
        if ($info === FALSE) {
            $error[] = "Unable to determine image type of uploaded file";
        }

        if (($info[2] !== IMAGETYPE_GIF) && ($info[2] !== IMAGETYPE_JPEG) && ($info[2] !== IMAGETYPE_PNG)) {
            $error[] = "Not a gif/jpeg/png";
        }
        if ($_FILES["images"]["size"][0] > 100000) {//1mb limit
            $error[] = "Sorry, your file is too large.";
        }
    }
}