尽管查询响应成功，但是无法从函数更新mysql表

Question

I am using PHPMyAdmin for my database. When a button on my html page is clicked, the following is executed:

var stopID = 10; // Sample
var stopPOV = "129.29,158.58"; // Sample

$.ajax({
    url: "getFromDB.php",
    type: "post",
    dataType: 'json',
    data: {
        action: "setStopPOV",
        stopID : stopID,
        stopPOV : stopPOV
    },
    success: function(data) {
        //alert(data);
    }
});

My getFromDB.php is such:

<?php
    require_once('connect.php');
    require_once('db_functions.php');

    if (isset($_POST["action"]) && !empty($_POST["action"])) {
        $action = $_POST["action"];

        switch ($action) {
            case "setStopPOV":
                $stopID = $_POST['stopID'];
                $stopPOV = $_POST['stopPOV'];

                setStopPOV($stopID, $stopPOV);
                break;
        }
    }
?>

Finally, setStopPOV(...) function inside db_functions.php is as below:

<?php
    function setStopPOV($stopID, $stopPOV) {
        global $dbc;        // Set in connect.php

        $query  = "UPDATE stop ";
        $query .= "SET STOP_POV = '{$stopPOV}' ";
        $query .= "WHERE STOP_ID = '{$stopID}'";

        $result = @mysqli_query($dbc, $query) or die("Error updating record: " . mysqli_error($dbc));

        if ($result) {
            file_put_contents('function_result.txt', "Record updated successfully" . PHP_EOL, FILE_APPEND);
        } else {
            file_put_contents('function_result.txt', "Error updating record" . PHP_EOL, FILE_APPEND);
        }
    }
?>

This outputs 'Record updated successfully' info the txt file, but nothing is updated in the database.

However, if getFromDB.php is like this:

<?php
    require_once('connect.php');
    require_once('db_functions.php');

    // NEW CODE ADDED START
    $id = 10;
    $pov = "129.29,158.58";

    $qry  = "UPDATE stop ";
    $qry .= "SET STOP_POV = '{$pov}' ";
    $qry .= "WHERE STOPID = '{$id}'";

    $result = @mysqli_query($dbc, $qry) or die("Error updating record: " . mysqli_error($dbc));

    if ($result) {
        file_put_contents('function_result.txt', "Record updated successfully" . PHP_EOL, FILE_APPEND);
    } else {
        file_put_contents('function_result.txt', "Error updating record" . PHP_EOL, FILE_APPEND);
    }
    // NEW CODE ADDED FINISH

    ...

    // The rest is previous code as shown above
    if (isset($_POST["action"]) && !empty($_POST["action"])) {
        $action = $_POST["action"];

        switch($action) {
            // Code
        }
    }
?>

And I go to the page directly (ie localhost/getFromDB.php), The txt file has 'Record updated successfully' AND the database is updated!

It is important to note, that my db_functions.php contains other functions which retrieve info from the DB and they work as expected. For example, this is one such function in the db_functions.php

function getRouteList() {
    global $dbc;

    $query  = "SELECT RTE_NAME, TRAV_DIR ";
    $query .= "FROM route";

    $result = @mysqli_query($dbc, $query) or die("Error in Selecting " . mysqli_error($dbc));

    // Do whatever I want with the retrieved data
}

I have tried everything to get the update to work, but I haven't been able to. What am I missing?

Answer 1

From my comment:

If you add the line $affected_rows = mysqli_affected_rows($dbc); after the query and record $affected_rows in function_result.txt , how many rows does it say were affected? Can you also record the value of $query in function_result.txt for both versions of getFromDB.php and compare the differences?

The answer was found - in one instance a database variable was named STOPID in the other, it was STOP_ID . By OP comparing the queries, they found the difference and resolved the issue.