how can insert admin user fields in database when install script php - php

Question

i start write a script with php , for installation stage i face to a problem.
when i install sql table with php code and after that "in same code page" i want insert admin_user information to user table , without any error user information not inserted in database but when i install Manually database table and after that run same code for insert admin_user information inserted run good and information inserted in database.
My Query Run PDO Method :
// Execute query
public function Tbmedia_runquery($query_body = "" , $parameter_array ="" ){
$query = $query_body;
$stmt = $this->Tbmedia_connection->prepare($query);
if(is_array($parameter_array)){
// declare bind_param variable
foreach ($parameter_array as $key => &$value) {
$stmt->bindParam(":$key",$value);
//':$key'
}
}
$stmt->execute();
$stmt->closeCursor();
return $stmt;
}
And this is My Create Database Table Function :
//Create DB Table
function Tbmedia_dbcreator($db_con){
$dir_sql = __DIR__."/../../install/tbmedia.sql";
if(!file_exists($dir_sql) or is_writable($dir_sql)){
$line_array = file($dir_sql);
$query_line = "";
$query = "";
foreach ($line_array as $value) {
if(substr($value,0,2) == "--")
continue;
$query_line .=$value;
if (substr(trim($value),-1,1) == ";"){
try{
$query = $db_con->Tbmedia_runquery($query_line);
$query_line = "";
}catch (Exception $e){
$file_name = basename($e->getFile());
$file_line = $e->getLine();
Tbmedia_die();
}
}
}
}else{
Tbmedia_die();
}
}
And this is simple insert sql for insert user user information after run function Tbmedia_dbcreator() :
$db_con->Tbmedia_runquery('INSERT INTO `tbmedia`.`tbmedia_user` (`user_name`,`user_state`) VALUE ("FARAMARz",1)');
Why this is happening ? can't create table and insert data to it in one page code ?