I have data's stored with the delimiter / in my table. I need to separate them and need to store them in different table. While doing that i'm getting:
Notice: Undefined index: VSX1 in /opt/lampp/htdocs/disease.php on line 21
How can I solve this kind of error?
<html>
<body>
<?php
$username = "root";
$password = "****";
$hostname = "localhost";
$dbhandle = mysql_connect($hostname, $username, $password) or die("Unable to connect to MySQL");
$selected = mysql_select_db("disease",$dbhandle) or die("Could not select disease");
$result = mysql_query("SELECT * FROM `primary_data` LIMIT 0, 30");
while($row = mysql_fetch_array($result))
{
$string = $row['gene_name'];
$tok = strtok($string, "/");
while ($tok !== false) {
mysql_query("insert into temp_gene gene_name values('".$_POST[$tok]."')");
$tok = strtok("/");
}
}
mysql_close($dbhandle);
?>
</table>
</body>
</html>
You transfer data from one table and save it to another. You need no $_POST variable at all! Of course, data MUST be escaped well.
while (($tok = strtok($string, '/')) !== false) {
$tok = mysql_real_escape_string($tok);
mysql_query("INSERT INTO temp_gene(gene_name) VALUES('{$tok}')");
}
I second Brad:s advice of using PDO & prepared statements - it is way more elegant and efficient.
Here's some code for you... as I have no idea what you want to do with tokensizing, etc. I've not written the logic for what to do with $gene_name, but I'm sure you do =)
Have a look at http://www.php.net/manual/en/book.pdo.php I also advice you to use Doctrine as a wrapper/ORM on top of PDO, it makes things real easy: http://www.doctrine-project.org/
$dsn = "mysql:dbname={$db_name};host={$db_host}";
try {
// init db handler.
$db = new PDO( $dsn, $db_username, $password );
// Execute selecting query.
$select_sql = "SELECT gene_name FROM `primary_data` LIMIT 0, 30";
$select_stmt = $db -> prepare( $sql );
$select_stmt -> execute();
// Bind row column 1 (1-indexed) to $gene_name.
$select_stmt -> bindColumn( 1, $gene_name );
// Prepare insert query to temp_gene.
$temp_sql = "INSERT INTO temp_gene(gene_name) VALUES(?)";
$temp_stmt = $db -> prepare( $temp_sql );
// Begin transaction, it is more efficient to use transactions as your actual queries becomes 1 instead of O(rows).`enter code here`
$db -> beginTransaction();
while ( $row = $select_stmt -> fetch( PDO::FETCH_BOUND ) ) {
$string =& $gene_name;
// do your tokenizing logic here... also do escaping for security.
$temp_stmt -> execute( array( $your_value_string ) );
}
// Commit the inserts.
$db -> commit();
} catch (PDOException $e) {
die( $e->getMessage() );
}