当php引发错误时，如何显示文件上传输入字段旁边的错误

Question

我有一个简单的HTML表单，该表格具有三个输入字段，其中包含type =“ file”。 PHP处理在数组中上传。一切都起作用，但我无法显示出错误时，靠近class =“ error_highlight”的“ div”中的输入字段。

我希望对脚本底部附近的两个“ else”语句的两个评论在发生错误时出现。他们以“显示此错误：”开头。有人可以帮我吗？

<?php

if(!empty($_FILES['images'])){
    // File upload configuration
    $allowTypes = array('jpg','png','jpeg','gif');
     
    $images_arr = array();
    foreach($_FILES['images']['name'] as $key=>$val){
        $image_name = $_FILES['images']['name'][$key];
        $tmp_name   = $_FILES['images']['tmp_name'][$key];
        $size       = $_FILES['images']['size'][$key];
        $type       = $_FILES['images']['type'][$key];
        $error      = $_FILES['images']['error'][$key];
         
        $fileType = pathinfo($image_name);// split path in its components 
        $extension = strtolower($fileType['extension']);// extract the extension and normalize to lowercase

        if(in_array($extension, $allowTypes)){
            echo $extension;

            if($error === 0){

                    $fileNameNew = uniqid('', true).".".$extension;
                    $fileDestination = 'user_images/'.$fileNameNew;

                    move_uploaded_file($tmp_name, $fileDestination);
                    //header("location: test");

            } else {
                // Show this error as $errors = "An error prevented from uploading your image / file. Please try again.";
            }

        } else {
            // Show this error as $errors = "Unable to upload the selected file type. Please use files or images with extensions ending on jpg / jpeg / png / pdf";

        }
    }
}

？＆gt;

<form action="" method="post" enctype="multipart/form-data">
    <div>
        <input type="file"  name="images[]" >
            <div class="error_highlight"><?php echo $errors; ?></div>
    </div>

    <div>
        <input type="file"  name="images[]" >
            <div class="error_highlight"><?php echo $errors; ?></div>
    </div>  

    <div>
        <input type="file"  name="images[]" >
            <div class="error_highlight"><?php echo $errors; ?></div>
    </div>

  <input type="submit" name="submit" value="Upload all files">
</form>

Answer 1

首先，您似乎没有声明$错误，而只是循环$错误。
您需要使用错误并使用数组显示错误。喜欢$ _文件['images'] ['错误']