Why Session Variable Auto Switches ?

Php Folks,

Why on earth does the following variable’s value “5” auto switch to “0” when I reload the page ?
$_SESSION[‘row_count’] = $row_count;

You see, when we on PAGE 1, the value is 5. Then when I reload the page with different param in url this time from “page_1” to “page_2” (pagination) then the $_SESSION[‘row_count’] = 0. While on PAGE 1, it was $_SESSION[‘row_count’] = 5.
Why the God Forsaken value switch ?

[code]
function search()
{
function rows_count()
{
//Connect to Database. (DB_SERVER, BD_USERNAME, DB_PASSWORD, DB_NAME).
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$conn = mysqli_connect(“localhost”,”root”,””,”powerpage”);
$conn->set_charset(‘utf8mb4’); //Always set Charset.

if($conn === false)
{
die(“ERROR: Connection Error!. ” . mysqli_connect_error());
}

$query_1 = “SELECT COUNT(id) FROM users WHERE first_name = ? AND marital_status = ?”;
$stmt_1 = mysqli_stmt_init($conn);
if(mysqli_stmt_prepare($stmt_1,$query_1))
{
mysqli_stmt_bind_param($stmt_1,”ss”,$_POST[“first_name”],$_POST[“marital_status”]);
mysqli_stmt_execute($stmt_1);
$result_1 = mysqli_stmt_bind_result($stmt_1,$row_count);
mysqli_stmt_fetch($stmt_1);
$_SESSION[‘row_count’] = $row_count;
$_SESSION[‘form_step’] = ‘end’;
}
//Close Statement.
mysqli_stmt_close($stmt_1);
//Close Connection.
mysqli_close($conn);
}
[/code]

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