前端发布-仅允许上传图像文件

如何允许用户仅上载图像文件？

作用php

// Insert Attachment
function insert_attachment($file_handler, $post_id, $setthumb=\'false\') {
    if ($_FILES[$file_handler][\'error\'] !== UPLOAD_ERR_OK){ return __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\');

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

if ($setthumb == 1) update_post_meta($post_id, \'_thumbnail_id\', $attach_id);
    return $attach_id;
}

模板帖子。php

//Featured Image
if ($_FILES) {
    array_reverse($_FILES);
    $i = 0; //this will count the posts
    foreach ($_FILES as $file => $array) {
        if ($i == 0) $set_feature = 1; //if $i ==0 then we are dealing with the first post
        else $set_feature = 0; //if $i!=0 we are not dealing with the first post
        $newupload = insert_attachment($file, $post_id, $set_feature);
        //echo $i++;
        }
}

需要您的帮助才能完成此操作。

// Insert Attachment function insert_attachment($file_handler, $post_id, $setthumb=\'false\') { if ($_FILES[$file_handler][\'error\'] !== UPLOAD_ERR_OK){ return __return_false(); } # uploaded file type $fileMimeType = $_FILES[$file_handler][\'type\']; # allowed types $allowmimeType = array( \'png\' => \'image/png\', \'jpeg\' => \'image/jpeg\', \'gif\' => \'image/gif\', ); # check if mime type type if(!in_array($fileMimeType,$allowmimeType) ){ return __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\'); //echo $attach_id = media_handle_upload($file_handler, $post_id); $attach_id = media_handle_upload($file_handler, $post_id); if ($setthumb == 1) update_post_meta($post_id, \'_thumbnail_id\', $attach_id); return $attach_id; }

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