If you are trying to replicate the function pg_query_params, you might also want to support NULL values. While is_int returns true for a NULL value, the formatting for the SQL.
function pg_query_params( $db, $query, $parameters ) {
// Escape parameters as required & build parameters for callback function
global $pg_query_params__parameters;
foreach( $parameters as $k=>$v ) {
if ( is_null($v) ) {
$parameters[$k] = 'NULL';
} else {
$parameters[$k] = ( is_int( $v ) ? $v : "'".pg_escape_string( $v )."'" );
}
}
$pg_query_params__parameters = $parameters;
// Call using pg_query
return pg_query( $db, preg_replace_callback( '/\$([0-9]+)/', 'pg_query_params__callback', $query));
}
