PHP: How can I determine if a variable has a value that is between two distinct constant values?

Question

How can I determine using PHP code that, for example, I have a variable that has a value

between 1 and 10, or
between 20 and 40?

No, I don't get the idea! You mean "pick a random number between 1 and 10"? Or "calculate the value half-way between 1 and 10"? Or something else? — Oliver Charlesworth, Apr 13 '11 at 23:02
Your question is not clear. Do want to *get* a random value between 1 to 10 or 20 to 40 or do you want to *test* whether some value is in these ranges? Or even something else? — Felix Kling, Apr 13 '11 at 23:02
I know, PHP could really do with the SQL equivalent of the BETWEEN statement. It's not hard to do a if(x>=1 && x<=10), but somehow a between might be neater. — Justin Levene, Nov 19 '20 at 10:51

score 89 · Accepted Answer · edited Mar 27 '14 at 18:01

89

if (($value > 1 && $value < 10) || ($value > 20 && $value < 40))

edited Mar 27 '14 at 18:01

cvsguimaraes

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answered Apr 13 '11 at 23:03

Daniel A. White

187,200
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1

Leaves out the fact that the number could be 1 or 10, 20 or 40. – VikingBlooded Sep 02 '16 at 16:01
9

@VikingBlooded got to love the ambiguity of English and off by one errors – Daniel A. White Sep 02 '16 at 16:03
1

there is no helper function to check a number between 2 numbers in PHP? – Ebrahim Bashirpour Feb 14 '21 at 08:56

score 22 · Answer 2 · edited Sep 02 '16 at 15:56

Do you mean like:

$val1 = rand( 1, 10 ); // gives one integer between 1 and 10
$val2 = rand( 20, 40 ) ; // gives one integer between 20 and 40

or perhaps:

$range = range( 1, 10 ); // gives array( 1, 2, ..., 10 );
$range2 = range( 20, 40 ); // gives array( 20, 21, ..., 40 );

or maybe:

$truth1 = $val >= 1 && $val <= 10; // true if 1 <= x <= 10
$truth2 = $val >= 20 && $val <= 40; // true if 20 <= x <= 40

suppose you wanted:

$in_range = ( $val > 1 && $val < 10 ) || ( $val > 20 && $val < 40 ); // true if 1 < x < 10 OR 20 < x < 40

score 10 · Answer 3 · answered Jan 02 '19 at 22:53

10

You can do this:

if(in_array($value, range(1, 10)) || in_array($value, range(20, 40))) {
   # enter code here
}

answered Jan 02 '19 at 22:53

HFranco

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This looks very clean but be aware that i.e. testing for a price being between one and million means creating an array with million items. I've just measured both ways with microtime() and this one seems to run around 2000x slower for such large range while also consuming a lot of memory. – Josef Habr Oct 14 '20 at 12:25

score 7 · Answer 4 · answered Apr 13 '11 at 23:03

7

if (($value >= 1 && $value <= 10) || ($value >= 20 && $value <= 40)) {
   // A value between 1 to 10, or 20 to 40.
}

answered Apr 13 '11 at 23:03

don

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score 5 · Answer 5 · answered Jan 22 '22 at 23:27

Sorry for the late answer, but this function allow you to do that.

  function int_between($value, $start, $end) {
    return in_array($value, range($start, $end));
  }

  // Example
  $value1 = 20;
  $value2 = 40;
  echo int_between(20, $value1, $value2) ? "true" : "false";

score 4 · Answer 6 · answered Apr 13 '11 at 23:04

4

Guessing from the tag 'operand' you want to check a value?

$myValue = 5;
$minValue = 1;
$maxValue = 10;

if ($myValue >= $minValue && $myValue <= $maxValue) { 
  //do something
}

answered Apr 13 '11 at 23:04

Codecraft

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score 2 · Answer 7 · answered Feb 15 '18 at 10:24

2

If you just want to check the value is in Range, use this:

   MIN_VALUE = 1;
   MAX_VALUE = 100;
   $customValue = min(MAX_VALUE,max(MIN_VALUE,$customValue)));

answered Feb 15 '18 at 10:24

Peter Berwanger

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This doesn´t check the value is between the range, it returns a new value that will be between the range. – Gonzalingui Dec 19 '19 at 16:39

kakarot · Answer 8 · 2018-09-28T11:04:34.663

0

Try This

if (($val >= 1 && $val <= 10) || ($val >= 20 && $val <= 40))

This will return the value between 1 to 10 & 20 to 40.

edited Sep 28 '18 at 11:04

answered Sep 27 '18 at 07:08

kakarot

3
3

Leaves out the fact that the number could be 1 or 10, 20 or 40. – kakarot Oct 06 '18 at 07:35

score 0 · Answer 9 · edited Mar 24 '23 at 21:23

This is a good solution.

function int_between($value, $min, $max) {
    return in_array($value, range($min, $max));
}

I think this one is faster than the above

function int_between2($value, $min, $max) {
    return $value == min($max, max($min, $value));
}

But, this is 3 times faster than others.

function int_between3($value, $min, $max) {
    return ($value >= $min && $value <= $max);
}

PHP: How can I determine if a variable has a value that is between two distinct constant values?

9 Answers9