Possible security flaw php and SQL

Question

So I have this code which basicaly retrieves data from a mysql database:

$categoria = $_GET['categoria'];

if($categoria ==""){}else{

$consulta = @mysql_query("SELECT * FROM productos where categoria='$categoria' ORDER BY     nombre ASC");

while($seleccion = @mysql_fetch_array($consulta)){

$nombre = $seleccion['nombre'];

$referencia = $seleccion['referencia'];

$descripcion = $seleccion['descripcion']; 

$imagen = $seleccion['imagen'];

And well after that I echo all of the variables... I was wondering, might there be any problem regarding security with a code like this? Is there any risk of it being hacked?
Thanks!

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Answer 1

With your existing setup of mysql extension the best approach to follow is at least passing the strings through mysql_real_escape_string. If you can move to mysqli or pdo based setup that would be ideal.

$consulta = @mysql_query("SELECT * FROM productos where categoria='" . mysql_real_escape_string($categoria) . "' ORDER BY     nombre ASC");

Also a side note from Simon its best you don't prefix the statement with @. This adds a bit of overhead to the execution. You should handle errors with error_reporting and display_errors.

Possible security flaw php and SQL

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