Problema con función mysql_real_escape_string

[jossmorenn]

Cuando llames la funcion mysql_real_escape_string() envia como segundo parametro el $link_identifier.

Mira lo que dice el manual

The MySQL connection. If the link identifier is not specified, the last link opened by mysql_connect() is assumed. If no such link is found, it will try to create one as if mysql_connect() was called with no arguments. If no connection is found or established, an E_WARNING level error is generated.