check_upload_mimes() – Function | Developer.WordPress.org

Checks an array of MIME types against a list of allowed types.

Description

WordPress ships with a set of allowed upload filetypes, which is defined in wp-includes/functions.php in get_allowed_mime_types() . This function is used to filter that list against the filetypes allowed provided by Multisite Super Admins at wp-admin/network/settings.php.

Parameters

$mimesarrayrequired

Return

array

Source

$user_blogs       = get_blogs_of_user( (int) $user_id );
$most_recent_post = array();

/*
 * Walk through each blog and get the most recent post
 * published by $user_id.
 */
foreach ( (array) $user_blogs as $blog ) {
	$prefix      = $wpdb->get_blog_prefix( $blog->userblog_id );
	$recent_post = $wpdb->get_row( $wpdb->prepare( "SELECT ID, post_date_gmt FROM {$prefix}posts WHERE post_author = %d AND post_type = 'post' AND post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1", $user_id ), ARRAY_A );

	// Make sure we found a post.

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Changelog

Version	Description
MU (3.0.0)	Introduced.

User Contributed Notes

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Codex 9 years ago

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Get allowed MIME types
```
$mimes = array(
    'jpg|jpeg|jpe' => 'image/jpeg',
    'php'          => 'application/x-php', // This isn't on the whitelist!
);
$mimes = check_upload_mimes( $mimes );
print_r( $mimes );
```
Output:
```
Array( 'jpg|jpeg|jpe' => 'image/jpeg' )
```
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check_upload_mimes( array $mimes ): array

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