Question

我有一个变量集$ TSID2，但是当它被调用时，它什么都不返回。我已尝试使用它全球化它仍然无法正常工作。我已经在其中包含了脚本的相关部分（问题行是最后一行）。我已经尝试将它改成几个不同的名字，尝试直接回声等等，似乎没有任何东西可以使用它。出了什么问题？

    // --------------------------
    // INSERT YOUR SENSOR IDS HERE - THIS IS FOR BOTH CHANNEL A AND B. See thread for info.
    $sensorida = 'xxxx';
    $sensoridb = 'xxxx';
    // INSERT YOUR THINGSPEAK API KEYS HERE FOR PM10 RESULTS. See thread for info, but can be found in your sensor's JSON file.
    // TSID and TSKey are for Channel A and TSI2 and TSKey2 are for Channel B.
    $TSID = 'xxxx';
    $TSKey = 'xxxx';
    $TSID2 = 'xxxx';
    $TSKey2 = 'xxxxx';
    // --------------------------
    // USE COLOR BLENDING (SHADING) LIKE PURPLEAIR DOES AS VALUE GETS NEARER TO NEXT LEVEL (1) OR JUST USE STATIC COLOR TO COLOR (0)
    $useblending = 1;
    // --------------------------
    // SHOW TIMESTAMP OF SENSOR DATA - 1= YES 0=NO
    $showtimestamp = 1;
    // TIMEZONE MUST BE IN FORMAT PHP RECOGNIZES - SEE PHP MANUALS IF YOU NEED HELP
    $timezone = 'America/Los_Angeles';
    // AVERAGE THE AQI VALUES BETWEEN CHANNEL A AND B IN ADDITION TO THE PM VALUES (1), OR SHOW BOTH SENSORS INDIVIDUALLY (0)
    $averageaqi = 1;
    // SHOW UG/M3 RESULTS TO 2 DECIMAL PLACES INSTEAD OF JUST 0 IF LESS THAN 1
    $showdecimal = 1;
    // INSERT YOUR LOCATION OR SENSOR NAME
    $sensorname = "My Sensor";
    // DISPLAY PM10 PARTICLE VALUES
    // Note: You can display the PM10 AQI value by using the variable $AQI10. Put it in some HTML.
    $showpm10 = 0;
    // --------------------------
    // SQL LOGGING MODE
    // 0 = DON'T LOG ANY RESULTS; JUST DISPLAYS THE PURPLEAIR RESULTS AS NORMAL
    // 1 = LOG THE RESULTS TO DATABASE AND DISPLAY THE PURPLEAIR RESULTS AS NORMAL
    // 2 = LOG THE RESULTS TO DATABASE AND DON'T DISPLAY ANYTHING (CRON-TYPE SCRIPT)
    //
    // Note: The AQI logged results are always combined values (A+B) like what is shown on Purpleairs site. You can change the script if you want it done differently.
    // PM values are logged as each channel.
    //
    // IMPORTANT: YOU MUST CREATE THE DATABASE AND ITS LAYOUT - A MYSQL EXPORT IS AVAILABLE IN THE THREAD.
    $logtosql = 0;
    // --------------------------
    //MYSQL PARAMETERS FOR SQL LOGGING MODES
    $servername = "localhost";
    $username = "username";
    $password = "password";
    $dbname = "myDB";
    $tbldata = "purpleairdata";

    if ($sensorida == "")
    {
        echo "No sensor ID A entered in Script source!";
        die;
    }

    if ($sensoridb == "")
    {
        echo "No sensor ID B entered in Script source!";
        die;
    }

    if ($TSID == "" || $TSID2 = "")
    {
        echo "No Thingspeak credentials entered.";
        die;
    }

    //Make sure Purpleair's Site can be reached

    $host = 'purpleair.com';
    if($socket =@ fsockopen($host, 80, $errno, $errstr, 10)) {
        fclose($socket);    //Wer'e good
    } else {
        echo 'The PurpleAir service is currently unreachable. Try again later.';
        error_log("Could not connect to the PurpleAir servers for the script data.");
        die;
    }

    //Make sure Thingspeak's Site can be reached

    $host = 'api.thingspeak.com';
    if($socket =@ fsockopen($host, 80, $errno, $errstr, 10)) {
        fclose($socket);    //Wer'e good
    } else {
        echo 'The Thingspeak service is currently unreachable. Try again later.';
        error_log("Could not connect to the Thingspeak servers for the script data.");
        die;
    }

    //Get the sensor data via JSON
    $pajsona = file_get_contents("http://www.purpleair.com/json?show=" . $sensorida);
    $pajsonb = file_get_contents("http://www.purpleair.com/json?show=" . $sensoridb);

    //Get the PM10 value from Thingspeak
    $pm10 = file_get_contents("https://api.thingspeak.com/channels/" . $TSID . "/fields/field3/last.txt?api_key=" . $TSKey);
    $pm102 = file_get_contents("https://api.thingspeak.com/channels/" . $TSID2 . "/fields/field3/last.txt?api_key=" . $TSKey2);

Answer 1

在if语句中被覆盖，错过了额外的=。

PHP - 设置变量为空

1 个答案: