River Water level and flood data in JSON example: https://apps.madet.my/banjir/river_level.php?state=perak

flood_status.php

<?php
/**
 * Created by PhpStorm.
 * User: Mahadir
 * Date: 2/6/2016
 * Time: 10:04 PM
 */
date_default_timezone_set("Asia/Kuala_Lumpur");
set_time_limit ( 300);
error_reporting(E_ALL ^ E_NOTICE);
try{
    $time_start = microtime(true);
    $subject  = file_get_contents('http://publicinfobanjir.water.gov.my/main-page.cfm?switchs=1');
    $time_end = microtime(true);
    $execution_time = ($time_end - $time_start);
    $expr = '<font.+?>Makluman:<\/font>[\s\S]+?<font.+?>([\s\S]+?)<\/font>[\s\S]+?Masa:[\s\S]+?<font.+?>([\s\S]+?)<\/font>';
    $result = preg_match_all("/$expr/i",$subject,$matches);

    if($result){
        $warning_hujan = $matches[1][1];
        $time_hujan = $matches[2][1];

        $warning_banjir = $matches[1][0];
        $time_banjir = $matches[2][0];

        header('Content-Type: application/json');
        $data = array(
            array('warning'=>$warning_hujan,'time'=>$time_hujan,'type'=>'rain'),
            array('warning'=>$warning_banjir,'time'=>$time_banjir,'type'=>'flood'),
            array('execution_time_seconds'=>$execution_time)
        );
        echo json_encode(array('data'=>$data));
    }
}
catch(Exception $e){
    $e->getTrace();
}

river_water_info_parser.php

<?php
/**
 * Created by PhpStorm.
 * User: Mahadir
 * Date: 2/6/2016
 * Time: 10:04 PM
 */
date_default_timezone_set("Asia/Kuala_Lumpur");
error_reporting(E_ALL ^ E_NOTICE);

$state_param = $_GET['state'];
header('Content-Type: application/json');
echo json_encode(array("river"=>parse_river_level($state_param)));


function parse_river_level($state_param)
{
    $link = 'http://infobanjir.water.gov.my/waterlevel_page.cfm?';
    $state = array(
        'perlis' => array('state=PLS'),
        'kedah' => array('state=KDH','state=MAD'),
        'penang' => array('state=PNG'),
        'perak' => array('state=PRK'),
        'selangor' => array('state=SEL'),
        'kuala_lumpur' => array('state=WLH'),
        'negeri_sembilan' => array('state=NSN'),
        'melaka' => array('state=MLK'),
        'johor' => array('state=JHR'),
        'pahang' => array('state=PHG'),
        'terengganu' => array('state=TRG'),
        'kelantan' => array('state=KEL'),
        'sabah' => array('state=SAB'),
        'sarawak' => array('state=SRK'),
    );

    if(!array_key_exists($state_param,$state)){
        return array('error'=>array('msg'=>'Not Found!'));
    }

    $result_all = array();
    foreach($state[$state_param] as $param){
        $data = file_get_contents($link.$param);
        //parse row
        $preg_match = preg_match_all('/<tr height="30">([\s\S]+?)<\/tr>/i',$data,$matches_tr);

        if($preg_match){
            //foreach row
            foreach($matches_tr[1] as $tr){
                $result = array();
                //parse column
                $preg_match = preg_match_all('/<td.*?>([\s\S]+?)<\/td>/i',$tr,$matches_td);
                if($preg_match){
                    $tds = $matches_td[1];
                    //array 1 is station name
                    $preg_match = preg_match_all('/<font[\s\S]*?<font.*?>([\s\S]+?)<\/font>/i',$tds[1],$matches_station);
                    $station_name = $matches_station[1][0];

                    //array 4 is last update time
                    $preg_match = preg_match_all('/<font.*?>[\s\S]+?<strong>([\s\S]+?)<\/strong>[\s\S]+?<\/font>/i',$tds[4],$matches_last_update_time);
                    $last_update_time = trim($matches_last_update_time[1][0]);


                    //array 5 is river level
                    $preg_match = preg_match_all('/<font[\s\S]*?<font.*?>([\s\S]+?)<\/font>/i',$tds[5],$matches_river_level);
                    $river_level = trim($matches_river_level[1][0]);

                    //array 6 is normal level
                    $preg_match = preg_match_all('/<font[\s\S]+?>(<strong>)?([\s\S]+?)(<\/strong>)?<\/font>/i',$tds[6],$matches_normal_level);
                    $normal_level = trim($matches_normal_level[2][0]);

                    //array 7 is alert level
                    $preg_match = preg_match_all('/<font[\s\S]+?>(<strong>)?([\s\S]+?)(<\/strong>)?<\/font>/i',$tds[7],$matches_alert_level);
                    $alert_level = trim($matches_alert_level[2][0]);

                    //array 8 is alert level
                    $preg_match = preg_match_all('/<font[\s\S]+?>(<strong>)?([\s\S]+?)(<\/strong>)?<\/font>/i',$tds[8],$matches_warning_level);
                    $warning_level = trim($matches_warning_level[2][0]);

                    //array 8 is alert level
                    $preg_match = preg_match_all('/<font[\s\S]+?>(<strong>)?([\s\S]+?)(<\/strong>)?<\/font>/i',$tds[9],$matches_danger_level);
                    $danger_level = trim($matches_danger_level[2][0]);

                    $result = array(
                        'station_name' => $station_name,
                        'last_update_time' => $last_update_time,
                        'river_level' => $river_level,
                        'normal_level' => $normal_level,
                        'alert_level' => $alert_level,
                        'warning_level' => $warning_level,
                        'danger_level' => $danger_level,
                    );
                }

                $result_all[] = $result;
            }

        }
    }



    return $result_all;
}