CODEWITHSUNDEEP
php
patrik2017
patrik2017

Reputation: 15

calculate differences between two numbers

i would like to calculate the differences between two given numbers for example:
1 - 5 or 24 - 35

I have to separate the numbers in arrays and to write the differences between them like:
1 2 3 4 5 or 24 25 26 27 28 29 30 31 32 33 34 35

is there any php function that can handle that or any other php solution?

my code: 

$string = array('1 - 5','9','11','24 - 35'); 

$arr = explode(",", $string);                        
  foreach ($arr as $val) {
    if (preg_match("/ - /", $val)) {

        $val = trim($val);
        $min= trim(substr($val, 0, 2));
        $max = trim(substr($val, -2));

      }
    }

Thanks a lot!

Upvotes: 0

Views: 3973

Answers (6)

RiggsFolly
RiggsFolly

Reputation: 94672

You were using implode on the array unnecessarily. you need to process the array as an array to start with.

With the use of range() you can generate the numbers between x - y quite nicely.

There is also no need to get the regex engine involved in something as simple as is there a hyphen in this string

$string = array('1 - 5','9','11','24 - 35'); 

$new_arr = array();
foreach ($string as $val) {
    if (strpos($val,'-') !== false) {
        $v2 = explode('-', $val);
        foreach (range($v2[0],$v2[1]) as $v)
        $new_arr[] = $v;

    } else {
        $new_arr[] = $val;
    }
}       

print_r($new_arr);

RESULTS:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 9
    [6] => 11
    [7] => 24
    [8] => 25
    [9] => 26
    [10] => 27
    [11] => 28
    [12] => 29
    [13] => 30
    [14] => 31
    [15] => 32
    [16] => 33
    [17] => 34
    [18] => 35
)

Upvotes: 0

Rohan Kumar
Rohan Kumar

Reputation: 40639

Your $string is not a string it is a array so no need to explode array and try to use preg_split() to split strings. Use range() and implode() without using loop like,

<?php
$arr = array('1 - 5','9','11','24 - 35'); 
foreach ($arr as $val) {
    $range = preg_split("/ - /", $val);
    if(count($range)==2 && $range[0]<$range[1]){
       echo implode(',',range($range[0],$range[1]));
       echo "\n";
    }
}  
?>

Demo with Range without using Loop

Upvotes: 0

katona.abel
katona.abel

Reputation: 771

hope it helps

$string = array('1 - 5','9','11','24 - 35'); 

foreach ($string as $key => $val) {

    preg_match_all("/[0-9]+/", $val, $matches);

    if(count($matches[0]) == 1) {
        //single number
        $string[$key] = $matches[0][0];
    } elseif(count($matches[0]) == 2) {

        $n1 = intval($matches[0][0]);
        $n2 = intval($matches[0][1]);

        $vals = range($n1, $n2);
        $string[$key] = implode(" ", $vals);
    } else {
        throw new \RuntimeException("more than 2 numbers");
    }
}  

print_r($string);

result:

Array
(
    [0] => 1 2 3 4 5
    [1] => 9
    [2] => 11
    [3] => 24 25 26 27 28 29 30 31 32 33 34 35
)

Upvotes: 0

mlask
mlask

Reputation: 337

$string = '1 - 5,9,11,24 - 35';

$arr = explode(',', $string);
foreach ($arr as $val) {
    if (count($values = explode('-', $val)) === 2) {
        $range = range(min(trim($values[0]), trim($values[1])), max(trim($values[0]), trim($values[1])));
        var_dump($range);
    }
}

Upvotes: 0

Justinas
Justinas

Reputation: 43497

Use range() to get array of numbers in range.

Source

<?php
$numbers = ['1 - 5','9','11','24 - 35'];
$newNumbers = [];

foreach ($numbers as $i => $num) {
    $numRange = explode('-', str_replace(' ', '', $num));

    if (count($numRange) != 1) {
        $newNumbers = array_merge($newNumbers, range($numRange[0], $numRange[1]));
    } else {
        $newNumbers[] = $num;
    }
}

var_dump($newNumbers);

/**
Outputs

array(19) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  int(3)
  [3]=>
  int(4)
  [4]=>
  int(5)
  [5]=>
  int(9)
  [6]=>
  int(11)
  [7]=>
  int(24)
  [8]=>
  int(25)
  [9]=>
  int(26)
  [10]=>
  int(27)
  [11]=>
  int(28)
  [12]=>
  int(29)
  [13]=>
  int(30)
  [14]=>
  int(31)
  [15]=>
  int(32)
  [16]=>
  int(33)
  [17]=>
  int(34)
  [18]=>
  int(35)
}

Upvotes: 0

NID
NID

Reputation: 3294

You should use range()

<?php

foreach (range(24, 35) as $number) {
    echo $number."\n";
}


?>

Output:

24
25
26
27
28
29
30
31
32
33
34
35

http://codepad.org/kcozaHbp

Upvotes: 1

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