insert php in javascrip that is already shown by an echo

Hi, I am new, mixing php in javascript. I would like to know how I can adapt this foreach well in this javascript statement so that the information is displayed correctly.

    $consulta= $obj->getQueryConsulta();
    $result = $catalogo->obtenerLista($consulta);
    $datos = array();
    while ($row = mysql_fetch_array($result)) {
        $datos[$row['datos']] = $row['series'];
    }


      echo "<script>Highcharts.chart('container', {

    title: {
        text: '".$obj->getDescripcion()."'
    },

    subtitle: {
        text: 'Source: thesolarfoundation.com'
    },

    yAxis: {
        title: {
            text: '".$obj->getDescripcion()."'
        }
    },
    legend: {
        layout: 'vertical',
        align: 'right',
        verticalAlign: 'middle'
    },

    plotOptions: {
        series: {
            label: {
                connectorAllowed: false
            },
            pointStart: 2010
        }
    },

  series: [
  ". foreach ($datos as $key => $value) {

  "{"    
       " name: '".$key."',

        data: [".for ($index = 0; $index < 12; $index++) {

"$value[$index],]"

  }

  }
      " }],


    responsive: {
        rules: [{
            condition: {
                maxWidth: 500
            },
            chartOptions: {
                legend: {
                    layout: 'horizontal',
                    align: 'center',
                    verticalAlign: 'bottom'
                }
            }
        }]
    }

});  </script>";
     break;

 la sentencia original de javascript es esta

    series: [{
        name: 'Installation',
        data: [43934, 52503, 57177, 69658, 97031, 119931, 137133, 154175]

    }],