Selecting value from array with a range? - php

Question

I've an array on php that will return a lot of keys->values, like this:
Array
[0] => Array
(
[value] => 405
[information] => some information1
)
[1] => Array
(
[value] => 500
[information] => some information2
)
[2] => Array
(
[value] => 700
[information] => some information3
)
the values are numbers, i need to collect all the values, check the first one that will be >= $determinedvalue and then return the value "information" for this exactly array, is this even possible? I know i can do this if i create a temp table on my database, but i dont want to.
To be more clearly, when my value is "430" it will return me "some information2".
I've searched a lot on google but by now i dont know if this is even possible.
Appreciate any help.

Answer 1

This is a sample on how to do that. Comments in code can be used to explain the execution.
// Sample Array
$arr = array(
array
(
"value" => 405,
"information" => "some information1"
),
array
(
"value" => 500,
"information" => "some information2"
),
array
(
"value" => 700,
"information" => "some information3"
)
);
// Sample Number
$numberToCheck = 430;
// Sub Array To Assign
$subArray = array();
// Loop Through Outer Array
for ( $i = 0; $i < sizeof($arr); $i++)
{
// If Value In Array > Number Check
if ( $arr[$i]['value'] >= $numberToCheck )
{
$subArray = $arr[$i]; // Assign Sub Array
$i = sizeof($arr); // This is Used to Exit For Loop
}
}
print_r($subArray); // Print

Answer 2

Working runnable code: https://tech.io/snippet/QJ93AwV
Code snippent with comments:
<?php
/**
* Helper class for stable sort alogithms
* #see https://github.com/vanderlee/PHP-stable-sort-functions
* Class StableSort
*/
class StableSort
{
static public function usort(array &$array, $value_compare_func)
{
$index = 0;
foreach ($array as &$item) {
$item = array($index++, $item);
}
$result = usort($array, function ($a, $b) use ($value_compare_func) {
$result = call_user_func($value_compare_func, $a[1], $b[1]);
return $result == 0 ? $a[0] - $b[0] : $result;
});
foreach ($array as &$item) {
$item = $item[1];
}
return $result;
}
}
$array = [
// added for test sorting
[
'value' => 9999,
'information' => 'some information-1',
],
[
'value' => 1200,
'information' => 'some information0',
],
// \added for test sorting
[
'value' => 405,
'information' => 'some information1',
],
// added for test sorting stability
[
'value' => 405,
'information' => 'some information1.2',
],
[
'value' => 405,
'information' => 'some information1.1',
],
// \added for test sorting stability
[
'value' => 500,
'information' => 'some information2',
],
[
'value' => 700,
'information' => 'some information3',
],
];
// sort array
$determinedvalue = 430;
StableSort::usort($array, function ($item1, $item2) {
if ($item1['value'] == $item2['value']) return 0;
return $item1['value'] < $item2['value'] ? -1 : 1;
});
// then select the first element by condition
$res = null;
foreach($array as $v) {
if($v['value'] >= $determinedvalue) {
$res = $v['information'];
break;
}
}
// for testing
print $res;

Answer 3

$number = 430;
$array = Array
[0] => Array
(
[value] => 405
[information] => some information1
)
[1] => Array
(
[value] => 500
[information] => some information2
)
[2] => Array
(
[value] => 700
[information] => some information3
)
$firstArray = $array[0];
$secondArray = $array[1];
$threeArray = $array[2];
function selectValueFromArrayRange ($number, $start, $end, $value, $infomation)
{
$startValue = $start[$value];
$endValue = $end[$value];
if ( in_array($number, range($startValue, $endValue)) ) {
return $end[$infomation];
}
}
selectValueFromArrayRange($number, $firstArray, $secondValue, 'value', 'infomation')