PHP array find two numbers are one after another
PHP array find two numbers are one after another
I have a sorted array with these stop_ids.
1,
6,
13,
18,
31,
I just want to find given first search value(6) is before the second given value(31). I tried something like this. That means the find order should be, first (6) then (13) not (13) first and (6) then.
foreach ($parent_array as $key => $value)
$k = $key;
sort($routes); //another array with above values(stop_ids)
$st = 0;
foreach ($routes as $key => $value)
if($st == 1)
unset($parent_array[$k]);
break;
elseif($value->stop_id == 31)
$st = 1;
continue;
return $parent_array;
I can provide two values. Here I used second value(31) only. Any help ???
@iainn Hey.. these 1,6,13 (according to the below answer)always not be like. sometimes that array may looks like 2,12,9,10.... I just want to know if my given first value is 6, is that before my second value 31
– Ravi_R
Sep 15 '18 at 9:31
So the array isn't sorted? Or are there two arrays? Your question isn't very clear.
– iainn
Sep 15 '18 at 9:38
No. I sorted the array to get the number appearance order. OK just ignore that sorting part. I just want to know if my given first value is (6), is that before my second value (31)
– Ravi_R
Sep 15 '18 at 9:42
Ok, so what's wrong with the answer you've got? That's exactly what it does.
– iainn
Sep 15 '18 at 9:42
1 Answer
1
Get array keys, under which is every number is located and compare this keys:
function firstNumberFirst($array, $first_number, $second_number)
return array_search($first_number, $array) < array_search($second_number, $array);
$a = [1, 6, 13, 18, 31];
var_dump(
firstNumberFirst($a, 6, 13),
firstNumberFirst($a, 6, 18),
firstNumberFirst($a, 13, 6)
);
If array is not zero-indexed - apply array_values first.
array_values
Hey.. these 1,6,13 always not be like that way. sometimes that array may looks like 2,12,9,10.... I just want to know if my given first value is 6, is that before my second value 31
– Ravi_R
Sep 15 '18 at 9:29
Ahh.. Thanks man.. This is the way !!! :)
– Ravi_R
Sep 15 '18 at 9:46
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If the array is sorted then can't you just check that it contains both elements? The lowest will always be first.
– iainn
Sep 15 '18 at 9:24