PHP在我的输出中放置了奇怪的字符

I am trying to generate a SQL based on some inputs . I have a predefined SQL(in which i do some replacements) which will consume these inputs to generate the required SQL using ODBC connection

I have stored the predefined SQL in a JS file for now .

Here is the code for the same :

function get_Result($query_passed){
    //echo "inPHP";
      $conn=odbc_connect(connectiondetails) or die(odbc_errormsg());
      $resultset = odbc_exec($conn, $query_passed);

    $rowValues = [];

    while(odbc_fetch_array($resultset)){
        $rowValue = odbc_result($resultset,1);
        array_push($rowValues,$rowValue);
    }

    echo $rowValues[1].$rowValues[2]; // for debugging purpose
    odbc_close($conn); // closing the connection
} 

suppose the input is column1,column3 The required SQL which has to be generated is :

Select column1,sum(l1+week*column3)+ ........sum(l175+week*column3) from tempTable

my JS code looks like :

$.ajax({
        url: "logic/GetResultSet.php",
        type: "post",
        data:"query_To_Fire="+finQuery+"&action=get_Result",
        success: function(data){
    $("#finaleQuery").append("<b>Generated Query:</b>"+data);}

while debugging the JS i am getting the output as

select column1,sum(l1+week*column3)+...+sum(l76+week*column3)+LCLT_F3)1)����ȏ���ȏ 11 and so on 

The weird characters also include some text later which has various details like my ajax call parameters , my passwords etc .

there won't be a problem if my input is column1,column2 is cos , there won't be any summation on column2

this has been bugging me since long . Any idea for this behaviour .

Note : I am working with sublime text so no option of debuggin the actual PHP code .

I finally got the issue .

PHP has a default setting of "4096" bytes for handling of LONG Fields . As mentioned here

overriding the setting works for me : ini_set("odbc.defaultlrl", "10K");

php.ini can be modified to support project specific settings :

odbc.defaultlrl=4096 //default in php.ini

useful note :

; Handling of LONG fields.  Returns number of bytes to variables.  0 means
; passthru.
odbc.defaultlrl=0 //to get as many characters as the long text contains.