como hacer correlativo de numeros en array

[castrovega7]

Vale el problema es que de cada vuelta del while imprimes tres veces:

Código PHP:

$tabla[] = $PROVEEDOR . "\t";
$tabla[] = $total . "\t"; //DIMPORT
$tabla[] = $i . "\t"; //DIMPORT
$tabla[] = $fecha . "\t"; //DDATE
$tabla[] = "\r\n";
 
$tabla[] = $PROVEEDOR . "\t";
$tabla[] = $BASEIMP_CON_DERCF . "\t"; //DIMPORT
$tabla[] = $i . "\t"; //DIMPORT
$tabla[] = $fecha . "\t"; //DDATE
$tabla[] = "\r\n";
 
$tabla[] = $PROVEEDOR . "\t";
$tabla[] = $IGV_CON_DERCF . "\t"; //DIMPORT
$tabla[] = $i . "\t"; //DIMPORT
$tabla[] = $fecha . "\t"; //DDATE
$tabla[] = "\r\n";
 

puedes solucionarlo así:

Código PHP:

$tabla[] = $PROVEEDOR . "\t";
$tabla[] = $total . "\t"; //DIMPORT
$tabla[] = $i . "\t"; //DIMPORT
$tabla[] = $fecha . "\t"; //DDATE
$tabla[] = "\r\n";
$i++;
 
$tabla[] = $PROVEEDOR . "\t";
$tabla[] = $BASEIMP_CON_DERCF . "\t"; //DIMPORT
$tabla[] = $i . "\t"; //DIMPORT
$tabla[] = $fecha . "\t"; //DDATE
$tabla[] = "\r\n";
$i++;
 
$tabla[] = $PROVEEDOR . "\t";
$tabla[] = $IGV_CON_DERCF . "\t"; //DIMPORT
$tabla[] = $i . "\t"; //DIMPORT
$tabla[] = $fecha . "\t"; //DDATE
$tabla[] = "\r\n";
 

No se, si es lo que buscas