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<?php

function ccd_svg_support( $mimes ) {

	$user    = wp_get_current_user();
	$allowed = array( 'administrator' );

	if ( array_intersect( $allowed, $user->roles ) ) {
		$mimes['svg']  = 'image/svg+xml';
		$mimes['svgz'] = 'image/svg+xml';

		return $mimes;
	}

	return $mimes;

}
add_filter( 'upload_mimes', 'ccd_svg_support' );

?>