How to check if an integer is within a range of numbers in PHP

Question

How can I check if a given number is within a range of numbers

User · Answer

Here is my little contribution   function inRange  number       ranges    0  13  17  24  34  44  54  65  200      n   count  ranges      while  n--       if   number  gt   ranges  n          return  ranges  n  1   -    ranges  n   1

User · Answer

using a switch case      switch   num            case   num gt    value1  amp  amp   num lt    value2                echo  within range 1           break          case   num gt    value3  amp  amp   num lt    value4                echo  within range 2           break                                                             default    default             echo  within no range           break

User · Answer

Another way to do this with simple if else range  For ex    watermarkSize   0   if    originalImageWidth  gt   0   amp  amp    originalImageWidth  lt   640          watermarkSize   10    else if    originalImageWidth  gt   641   amp  amp    originalImageWidth  lt   1024          watermarkSize   25    else if    originalImageWidth  gt   1025   amp  amp    originalImageWidth  lt   2048          watermarkSize   50    else if    originalImageWidth  gt   2049   amp  amp    originalImageWidth  lt   4096          watermarkSize   100    else        watermarkSize   200

User · Answer

You could whip up a little helper function to do this          Determines if  number is between  min and  max        param  integer   number     The number to test     param  integer   min        The minimum value in the range     param  integer   max        The maximum value in the range     param  boolean   inclusive  Whether the range should be inclusive or not     return boolean              Whether the number was in the range     function in range  number   min   max   inclusive   FALSE        if  is int  number   amp  amp  is int  min   amp  amp  is int  max                 return  inclusive                 number  gt    min  amp  amp   number  lt    max                  number  gt   min  amp  amp   number  lt   max               return FALSE      And you would use it like so   var dump in range 5  0  10              TRUE var dump in range 1  0  1               FALSE var dump in range 1  0  1  TRUE         TRUE var dump in range 11  0  10  TRUE       FALSE     etc

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ranges         1   gt             min range    gt  0 01           max range    gt  199 99            2   gt             min range    gt  200 00                foreach   ranges as  value   gt   range            if  filter var   cartTotal  FILTER VALIDATE FLOAT     options    gt   range                    return  value

User · Answer

if    num  gt    lower boundary   amp  amp    num  lt    upper boundary       You may want to adjust the comparison operators if you want the boundary values not to be valid

User · Answer

I created a function to check if times in an array overlap somehow                  Function to check if there are overlapping times in an array of  DateTime objects                 param  ranges                return  DateTime   bool             public function timesOverlap  ranges            foreach   ranges as  k1   gt   t1                foreach   ranges as  k2   gt   t2                    if   k1     k2                            var  DateTime    t1                            var  DateTime    t2                         a    t1 0 - gt getTimestamp                         b    t1 1 - gt getTimestamp                         c    t2 0 - gt getTimestamp                         d    t2 1 - gt getTimestamp                         if    c  gt    a  amp  amp   c  lt    b      d  gt    a  amp  amp   d  lt    b                            return true                                                                           return false

User · Answer

You can use filter var  filter var       yourInteger       FILTER VALIDATE INT       array           options    gt  array               min range    gt   min                max range    gt   max                      This will also allow you to specify whether you want to allow octal and hex notation of integers  Note that the function is type-safe  5 5 is not an integer but a float and will not validate   Detailed tutorial about filtering data with PHP    https   phpro org tutorials Filtering-Data-with-PHP html

User · Answer

Might help   if   in array 2  range 1 7           echo  Number 2 is in range 1-7       http   php net manual en function range php

User · Answer

Some other possibilities   if  in array  value  range  min   max   true         echo  You can be sure that  min  lt    value  lt    max       Or   if   value     min max  value   min    max         echo  You can be sure that  min  lt    value  lt    max       Actually this is what is use to cast a value which is out of the range to the closest end of it    value   min max  value   min    max     Example         This is un-sanitized user input       posts per page   999          Sanitize  posts per page       posts per page   min max  posts per page  5   30           Use      var dump  posts per page      Output  int 30

User · Answer

The expression      min  lt    value   amp  amp    value  lt    max    will be true if  value is between  min and  max  inclusively  See the PHP docs for more on comparison operators

User · Answer

function limit range  num   min   max         Now limit it   return  num gt  max  max  num lt  min  min  num      min   0      Minimum number can be  max   4      Maximum number can be  num   10      Your number    Number returned is limited to be minimum 0 and maximum 4 echo limit range  num   min   max      return 4  num   2  echo limit range  num   min   max      return 2  num   -1  echo limit range  num   min   max      return 0

User · Answer

You can try the following one-statement   if    x- min    x- max   lt  0    or   if  max min  x   max    min      x

[php] How to check if an integer is within a range of numbers in PHP?

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