我允许从前端上载选定的几种类型的文件，例如。拉链mp4。jpeg和。pdf。到目前为止，所有这些文件类型在附加到上传到的帖子时都没有问题。然而，升级到WordPress 4.0后，我无法上传具体内容。zip文件类型，尽管它可以使用媒体上载界面从后端很好地上载。请注意，其他文件类型.mp4 and .pdf files still attach with no issues.

下面给出了执行附件功能的完整代码。

if ( isset( $_POST[\'upload_attachments\'] ) && $_SERVER[\'REQUEST_METHOD\'] === \'POST\' && wp_verify_nonce($_POST[\'secure_upload\'], \'upload_attachments_nonce\')) {

    //checking if upload is empty
    //checking if universal filesize is valid

    if ($_FILES) { //loop through multiple files.         
        $files = $_FILES[\'upload\'];
        foreach ($files[\'name\'] as $key => $value) {
            if ($files[\'name\'][$key]) {
                $file = array(
                    \'name\'     => $files[\'name\'][$key],
                    \'type\'     => $files[\'type\'][$key],
                    \'tmp_name\' => $files[\'tmp_name\'][$key],
                    \'error\'    => $files[\'error\'][$key],
                    \'size\'     => $files[\'size\'][$key]
                );

                $uploaded_file_type = $files[\'type\'][$key];
                $allowed_file_types = array(\'image/jpg\', \'image/jpeg\', \'image/png\', \'application/pdf\', \'application/zip\', \'video/mp4\');
                $uploaded_file_size = $files[\'size\'][$key];
                $size_in_kb = $uploaded_file_size / 1024;
                $file_size_limit = 10000; // Your Filesize in KB


                if(in_array($uploaded_file_type,  $allowed_file_types)) { 
                   if( $size_in_kb > $file_size_limit ) {
                   $upload_error .= \'Image files must be smaller than \'.$file_size_limit.\'KB\';
                   return;
                   } else {
                   $_FILES = array("upload" => $file);
                   foreach ($_FILES as $file => $array) {
                   $newupload = insert_attachment($file,$post_id);
                   //return; this loop neds to run multiple times so no return here
                 }      
                 }
                 } else { $upload_error .= \'Invalid File type\';
                         return;
                        }                                                              

                }
            }
        }                  

    header (\'Location: \' . $_SERVER[\'REQUEST_URI\']);//Post, redirect and get
    exit();
    }//end of nonce check 

<小时>Helper function insert_attachment 作者：goldenapples

function insert_attachment($file_handler,$post_id,$setthumb=\'false\') {

    // check to make sure its a successful upload
    if ($_FILES[$file_handler][\'error\'] !== UPLOAD_ERR_OK) __return_false();

    require_once(ABSPATH . "wp-admin" . \'/includes/image.php\');
    require_once(ABSPATH . "wp-admin" . \'/includes/file.php\');
    require_once(ABSPATH . "wp-admin" . \'/includes/media.php\');

    $attach_id = media_handle_upload( $file_handler, $post_id );

    //if ($setthumb) update_post_meta($post_id,\'_thumbnail_id\',$attach_id);
    return $attach_id;
}

<小时>

Form Html

<form method="post" id="frontend-attachment-upload-form" action="" enctype="multipart/form-data" >
<input type="file" multiple="true" name="upload[]">   

<?php wp_nonce_field(\'upload_attachments_nonce\',\'secure_upload\'); ?>
<input type="submit" id="upload_attachments_button" name="upload_attachments" value="UPLOAD">
<form>

---

。zip文件根本并没有上传，否则我会在媒体库中找到它们，即使并没有附加。当我尝试上载时。在前端的zip文件中，它只返回错误“无效文件类型”。正如您所看到的，这一行清楚地定义了所有文件类型：

$allowed_file_types = array(\'image/jpg\', \'image/jpeg\', \'image/png\', \'application/pdf\', \'application/zip\', \'video/mp4\');

那么，为什么会出现。mp4。pdf。jpeg所有其他文件类型都可以很好地附加。zip没有？从逻辑上讲，如果循环中出现错误，则根本不会上载任何文件类型。事实也是如此。直到几天前，zip文件还可以正常上传。我对正在发生的事一无所知。请给我一点帮助。

以防万一，我检查了允许的文件类型和it列表。允许的zip文件类型。那么，wordpress是否可能在image.php 或file.php 或media.php 这会阻止在前端上载特定类型的文件吗？

<?php $allowed_mimes = get_allowed_mime_types();
        echo \'<pre>\';
        print_r($allowed_mimes);
        echo \'</pre>\';
        ?>

<小时>

UPDATE : This issue has been solved, kindly take a look at the accepted answer.

$allowed_file_types = array(\'application/x-zip-compressed\', \'other file types......\');

function my_modify_mimes( $mimes ) {

    $mimes[\'zip\'] = \'application/zip\';
    $mimes[\'rar\'] = \'application/x-rar-compressed\';

    return $mimes;
}

add_filter( \'upload_mimes\', \'my_modify_mimes\' );