php - Wordpress 插件开发 - 文件上传：如何允许指定的文件类型？

Question

这是允许将图像上传到网站根目录的代码。它是管理区域中调用函数的子菜单页面，函数体如下：

 <div class="wrap">
<h2>Upload files</h2><br><br><br>
<form action="" method="post" enctype="multipart/form-data">
<input type="file" class="button" name="fileToUpload" id="fileToUpload">
<input type="submit" class="button button-primary" value="Upload File" name="submit">
</form>
</div>
<?php
// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
    $target_dir = get_home_path();//wp_upload_dir();
    $target_file = get_home_path() . '/' . basename($_FILES["fileToUpload"]["name"]);
    $uploadOk = 1;
    $imageFileType = strtolower(pathinfo($target_file,PATHINFO_EXTENSION));
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {
        ?>
        <div id="setting-error-settings_updated" class="updated settings-error notice is-dismissible">
        <strong>File is an image</strong>
        </div>
        <?php
        $uploadOk = 1;
    } else {
         ?>
        <div id="setting-error-settings_updated" class="updated settings-error notice is-dismissible">
        <strong>File is not an image</strong>
        </div>
        <?php
        $uploadOk = 0;
    }
    // Check if file already exists
    if (file_exists($target_file)) {
         ?>
        <div id="setting-error-settings_updated" class="updated settings-error notice is-dismissible">
        <strong>File already exists.</strong>
        </div>
        <?php
        $uploadOk = 0;
    }
    // Check file size
    if ($_FILES["fileToUpload"]["size"] > 500000) {
          ?>
        <div id="setting-error-settings_updated" class="updated settings-error notice is-dismissible">
        <strong>Your file is too large.</strong>
        </div>
        <?php
        $uploadOk = 0;
    }
    // Allow certain file formats
    if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != 
        "jpeg"
    && $imageFileType != "gif" ) {
          ?>
        <div id="setting-error-settings_updated" class="updated settings-error notice is-dismissible">
        <strong>Sorry, only JPG, JPEG, PNG & GIF files are allowed.</strong>
        </div>
        <?php
        $uploadOk = 0;
    }
    // Check if $uploadOk is set to 0 by an error
    if ($uploadOk == 0) {
          ?>
        <div id="setting-error-settings_updated" class="updated settings-error notice is-dismissible">
        <strong>Sorry, your file was not uploaded.</strong>
        </div>
        <?php
        // if everything is ok, try to upload file
    } else {
        if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {                 
             ?>
        <div id="setting-error-settings_updated" class="updated settings-error notice is-dismissible">
        <strong>The file has been uploaded.</strong>
        </div>
        <?php

        } else {
            echo "Sorry, there was an error uploading your file.";
        }
    }

}

我想允许这些文件类型而不是图像：.xml、.rar、.zip、.txt。我尝试使用函数更改getimagesize()函数getfilesize()并更改// Allow certain file formats注释下方的文件扩展名。但它不起作用。您是否知道我应该怎么做才能允许上传这些文件类型而不是当前启用上传的文件类型？

标签： phpwordpressfile-uploadfile-extensionfile-type

Answer 1

非常基本...

$allowed_extenstions=array('jpg','png','pdf','zip');

    $ext = pathinfo(esc_attr($_FILES['file']['name']), PATHINFO_EXTENSION);
            if (!in_array($ext,$allowed_learning_extenstions))
            {
                echo "invalid_file_type";
                die();
            }

`