php – mkdir()上的权限被拒绝

Warning: mkdir() [function.mkdir]:
Permission denied in
/home/server/public_html/wp-content/themes/mytheme/catimages/cat-images.php
on line 373

功能如下.它试图在网站的“wp-content / uploads文件夹”下创建一个文件夹.我已经验证PHP版本是5.2.15并且主题文件夹中的文件是可写的,但这并不一定意味着我认为uploads文件夹是可写的.

如何确定uploads文件夹是否可写？

protected function category_images_base_dir()
{
    // Where should the dir be? Get the base WP uploads dir
    $wp_upload_dir = wp_upload_dir();
    $base_dir = $wp_upload_dir[ 'basedir' ];
    // Append our subdir
    $dir = $base_dir . '/cat-images';
    // Does the dir exist? (If not,then make it)
    if ( ! file_exists( $dir ) ) {
        mkdir( $dir ); //THIS IS LINE 373
    }
    // Now return it
    return $dir;
}