I have an array of sorted numbers, for example:
Array (
[0] => 33
[1] => 34
[2] => 35
[3] => 36
[4] => 66
[5] => 67
[6] => 68
[7] => 69
[8] => 89
[9] => 90
[10] => 91
[11] => 92
[12] => 93
)
In this case, we have the following ranges of numbers:
1) 33-36
2) 66-69
3) 89-93
I want to create an array for each range:
Array1 ( [0] => 33 [1] => 34 [2] => 35 [3] => 36 )
Array2 ( [0] => 66 [1] => 67 [2] => 68 [3] => 69 )
Array3 ( [0] => 89 [1] => 90 [2] => 91 [3] => 92 [4] => 93 )
<?php
$array = [33,34,35,36,66,67,68,69,89,90,91,92,93];
$min = $array[0];
$currentRange = 0;
$ranges = [];
foreach ($array as $element) {
if($min+1 < $element) {
$currentRange++;
}
$ranges[$currentRange][] = $element;
$min = $element;
}
var_dump($ranges);
Output:
array(3) {
[0]=>
array(4) {
[0]=>
int(33)
[1]=>
int(34)
[2]=>
int(35)
[3]=>
int(36)
}
[1]=>
array(4) {
[0]=>
int(66)
[1]=>
int(67)
[2]=>
int(68)
[3]=>
int(69)
}
[2]=>
array(5) {
[0]=>
int(89)
[1]=>
int(90)
[2]=>
int(91)
[3]=>
int(92)
[4]=>
int(93)
}
}
sort($data) ; // if array is not always sorted
$result = array(); // final result
$item = array() ; // current sub-array
$lastElem = null ; // previous number
foreach($data as $n)
{
if(is_null($lastElem) or $n == ($lastElem + 1) ) // first numberor current numberfollow the previous one
{
// append n to the current sequence
$item[] = $n ;
}
else
{
// save current sequence, and create a new one for the next element
$result[] = $item ;
$item = array($n);
}
$lastElem = $n ;
}
// add the latest item if not empty
if( count($item) > 0)
$result[] = $item ;
print_r($result);
