Path: C:\
<?php
$n = count($_POST['no']);
for ($a=0;$a<$n;$a++){$nova[$a]=$_POST['no'][$a];}//echo $a.'--'.$nova[$a].'-->nova<br>';
//print_r($json);
$matriz = file_get_contents('matriz.json');
$principal = json_decode($matriz, true);
for ($a=0;$a<$n;$a++){$principal[$a]['cor']=$nova[$a];}//echo $a.'--'.$principal[$a]['cor'].'-->principal<br>';
//print_r($principal);
$json=json_encode($principal);
$fopen=fopen('matriz.json','w');
$fwrite=fwrite($fopen,$json);
fclose($fopen);
echo "<script language='JavaScript'>window.location.href='index.php';</script>";
?>