Código PHP:
echo '<form method=POST ><table>
<tr><td>SELECCIONES LOS INFORMES QUE QUIERE EXPORTAR A EXCEL</td></tr>
<tr><td>Nombre del Informe: <input type=text name=nombre_informe></td></tr>
<tr><td><strong><br>INVENTARIO <input name="select_informe[]" type="checkbox" value="todos"> TODOS</strong></td></tr>
<tr><td><br><input name="select_informe[]" type="checkbox" value="ficha"> Ficha</td></tr>
<tr><td><input name="select_informe[]" type="checkbox" value="grupos"> Grupos/Buzones</td></tr>
<tr><td><input name="select_informe[]" type="checkbox" value="servidores"> Servidores</td></tr>
<tr><td><input name="select_informe[]" type="checkbox" value="dominios"> Dominios</td></tr>
<tr><td><input name="select_informe[]" type="checkbox" value="hosting"> Hosting</td></tr>
<tr><td><input name="select_informe[]" type="checkbox" value="correo"> Correo</td></tr>
<tr><td><input name="select_informe[]" type="checkbox" value="conexiones"> Conexiones</td></tr>
<tr><td><input name="select_informe[]" type="checkbox" value="tareas"> Tareas Programadas</td></tr>
<tr><td><input name="select_informe[]" type="checkbox" value="usuarios"> Usuarios</td></tr>
<tr><td><input name="select_informe[]" type="checkbox" value="Ordenadores"> ordenadores</td></tr>
<tr><td><input name="select_informe[]" type="checkbox" value="perifericos"> Perifericos</td></tr>
</table><input type=hidden name=comprobacion_informe value=1><input type=submit value=Aceptar></form>';