validate_username( string $username )

Checks whether a username is valid.


Description Description


Parameters Parameters

$username

(string) (Required) Username.


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Return Return

(bool) Whether username given is valid


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Source Source

File: wp-includes/user.php

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function validate_username( $username ) {
    $sanitized = sanitize_user( $username, true );
    $valid     = ( $sanitized == $username && ! empty( $sanitized ) );
 
    /**
     * Filters whether the provided username is valid or not.
     *
     * @since 2.0.1
     *
     * @param bool   $valid    Whether given username is valid.
     * @param string $username Username to check.
     */
    return apply_filters( 'validate_username', $valid, $username );
}

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Changelog Changelog

Changelog
Version Description
4.4.0 Empty sanitized usernames are now considered invalid
2.0.1 Introduced.


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