// Depending on DSN, require either mysqli or mysql extensions.
if (strrpos(DSN, 'mysqli://', -strlen(DSN)) !== FALSE) {
if (extension_loaded('mysqli')) {
// Depending on DSN, require either mysqli or mysql extensions.
if (strrpos(DSN, 'mysqli://', -strlen(DSN)) !== FALSE) {
if (extension_loaded('mysqli')) {