Get a numeric user ID from either an email address or a login.

Description

A numeric string is considered to be an existing user ID and is simply returned as such.

See also

• get_user_by()

Parameters

$email_or_loginstringrequired

Either an email address or a login.

Return

Source

function get_user_id_from_string( $email_or_login ) {
	_deprecated_function( __FUNCTION__, '3.6.0', 'get_user_by()' );

	if ( is_email( $email_or_login ) )
		$user = get_user_by( 'email', $email_or_login );
	elseif ( is_numeric( $email_or_login ) )
		return $email_or_login;
	else
		$user = get_user_by( 'login', $email_or_login );

	if ( $user )
		return $user->ID;
	return 0;
}

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