Hello,

If you an array that can have 1-24 numbers in it, could be different lenghts.

```
$set = array(5,6,7,8,15,16,17);
```

I want to find out how many different sets of number are in the array. like in this array ther are 2 sets of congruent numbers: 5,6,7,8 and 15,16,17.

How can php tell me how many different sets are in an array and what is first and last value of each set is? I looked into preg_match and this whitch does not work:

```
$set = array(5,6,7,8,15,16,17);
$len = count($set);
foreach ($set as $key => $value) {
$new = $value;
//$new++;
if($value == $new++){
echo "yes";
} else {
echo "no";
}
echo "New: ". $new . " Value ". $value;
}
```

Thank you,

Boot Straps

Could you make a clear example? Maybe I can help.

oh yes,

I have table of week days and hours. Using Javascript I have an array of the selected hours of a day that are selected. I send the array to php by hidden form field. The array may look like:

```
$set = array(5,6,7,8,15,16,17);
```

So in my first post there are 2 sets of congruent sets of numbers: 5,6,7,8 and 15,16,17 each representing in hours on a 24 hours block time. 1st set starts at hour 5 and ends 4 hours later, using 4 how many congruent numbers in a row and so forth for the 2nd set 15,16,17.

```
$set = array(5,6,7,8,15,16,17);
$len = count($set);
$kio = array();
foreach ($set as $key => $value) {
$new = $key;
$tuo = $value - $key;
$kio[] = $tuo;
}
foreach ($kio as $key2 => $value2) {
echo $key2 . " " . $value2 . "<br>";
}
$result = array_unique($kio);
print_r($result);
$len2 = count($result);
echo " len2: " . $len2;
echo "<br><br>there are $len2 Sets: <br>";
$i = 0;
$cua = array_count_values($kio);
foreach ($result as $key3 => $value3) {
//echo "<br>" . $key3 . " " . $value3;
foreach ($cua as $key4 => $value4) {
$value4++;
echo "Set $i starts with $value4 and is $value4 Long <br>";
}
$i++;
}
```

Between my first post and now I was able make this. Does not work but very close I think.

So the term set you mean that consists of continue number?

Yes like 123456 but not 1234568.

Hope this help.

```
$set = array(5,6,7,8,15,16,17);
$len = count($set);
$kio = array();
$previous_number = 0;
$total_set = 0;
foreach ($set as $key => $value) {
if(($value-$previous_number) != 1 && $key!=0) {
$total_set++;
}
elseif($key==0) $total_set++;
$kio[$total_set][] = $value;
$previous_number = $value;
}
print_r($kio);
$len2 = count($kio);
echo " len2: " . $len2;
echo "<br><br>there are $len2 Sets: <br>";
for($i=1;$i<=$total_set;$i++)
{
echo "Set $i starts with ".$kio[$i][0]." and is ".count($kio[$i])." Long <br>";
}
```

thietkeweb,

You are great. It works prefect. Now I put it in a function and tomorrow i’ll try to get ajax to run the php function.

Thank you thank you.

Boot Straps