Checking Table exists before inserting php sql - php

Question

I am trying to check if a table exists before entering the data into it. I am trying mysql_query and getting errors that I should be using mysqli, but it does not seem to be working for me.
This is my code so far:
$AllData = $_POST["table"];
foreach ($AllData as $sigleData) {
$table = $sigleData['name'];
$columns = implode(", ", $sigleData['columns']);
$columnData = implode(" ',' ", $sigleData['data']);
// Insert into database tuple data
$sqlQuery = "INSERT INTO " . $table . " ( " . $columns . ") VALUES( '" . $columnData . "')";
if ($dbConnectionT->query($sqlQuery) == TRUE) {
echo "database updated";
echo "</br>";
}
}

Answer 1

Try this way to check table exists or not using this custom function and then insert row to your db.
function check_table_exist($table){
global $dbConnection; // see here global connection variable
$sql = "SHOW tables LIKE '".$table."'";
$res = $dbConnection->query($sql);
return ($res->num_rows > 0);
}
#check first table exists or not
if(check_table_exists($table)){
$sqlQuery = "INSERT INTO " . $table . " ( " . $columns . ") VALUES( '" . $columnData . "')";
//do other stuff........
}else{
echo "Table Not Exists";
die('Going Out');
}

Answer 2

Table name is accepted as POST parameter, seriously !! - bad practice.
You can do various check to table existence like
DESC tbl_name;
SHOW CREATE TABLE tbl_name;
SHOW TABLES like 'tbl_name';