How to get whole and decimal part of a number

Question

Given  say  1 25 - how do I get  1  and   25  parts of this number    I need to check if the decimal part is  0   25   5  or  75

User · Answer

If you can count on it always having 2 decimal places, you can just use a string operation:

$decimal = 1.25;
substr($decimal,-2);  // returns "25" as a string

No idea of performance but for my simple case this was much better...

User · Answer

val   -3 1234  fraction   abs val - as integer val

User · Answer

PHP 5 4    n   12 343  intval  n      12 explode      number format  n  1   1      3 explode      number format  n  2   1      34 explode      number format  n  3   1      343 explode      number format  n  4   1      3430

User · Answer

Cast it as an int and subtract   integer    int  your number   decimal    your number -  integer    Or just to get the decimal for comparison   decimal    your number -  int  your number

User · Answer

This is the way which I use    float   4 3        dec   ltrim   float - floor  float    0        result  3

User · Answer

The floor   method doesn t work for negative numbers   This works every time    num   5 7   whole    int   num      5  frac     num -  whole       7      also works for negatives  same code  different number     num   -5 7   whole    int   num      -5  frac     num -  whole      - 7

User · Answer

Brad Christie s method is essentially correct but it can be written more concisely     function extractFraction   value          fraction      value - floor   value       if   value  lt  0                 fraction    -1             return  fraction      This is equivalent to his method but shorter and hopefully easier to understand as a result

User · Answer

Just a new simple solution  for those of you who want to get the Integer part and Decimal part splitted as two integer separated values  5 25 - gt  Int part  5  Decimal part  25  num   5 25   int part   intval  num    dec part    num   100   100   This way is not involving string based functions  and is preventing accuracy problems which may arise in other math operations  such as having 0 49999999999999 instead of 0 5   Haven t tested thoroughly with extreme values  but it works fine for me for price calculations  But  watch out  Now from -5 25 you get  Integer part  -5  Decimal part  -25 In case you want to get always positive numbers  simply add abs   before the calculations   num   -5 25   num   abs  num    int part   intval  num    dec part    num   100   100   Finally  bonus snippet for printing prices with 2 decimals   message   sprintf  quot Your price   d  02d Eur quot    int part   dec part       so that you avoid getting 5 5 instead of 5 05

User · Answer

This code will split it up for you   list  whole   decimal    explode       your number     where  whole is the whole number and  decimal will have the digits after the decimal point

User · Answer

a short way  use floor and fmod    var    1 25    whole   floor  var          1  decimal   fmod  var  1     0 25   then compare  decimal to 0   25   5  or  75

User · Answer

There s a fmod function too  that can be used   fmod  my var  1  will return the same result  but sometime with a small round error

User · Answer

n   1 25   whole   floor  n           1  fraction    n -  whole      25   Then compare against 1 4  1 2  3 4  etc     In cases of negative numbers  use this   function NumberBreakdown  number   returnUnsigned   false       negative   1    if   number  lt  0           negative   -1       number    -1         if   returnUnsigned       return array        floor  number           number - floor  number                 return array      floor  number     negative        number - floor  number      negative          The  returnUnsigned stops it from making -1 25 in to -1  amp  -0 25

User · Answer

Not seen a simple modulus here      number           1 25   wholeAsFloat     floor  number        1 00  wholeAsInt       intval  number       1  decimal           number   1          0 25   In this case getting both  wholeAs  and  decimal don t depend on the other   You can just take 1 of the 3 outputs independently   I ve shown  wholeAsFloat and  wholeAsInt because floor   returns a float type number even though the number it returns will always be whole   This is important if you re passing the result into a type-hinted function parameter    I wanted this to split a floating point number of hours minutes  e g  96 25  into hours and minutes separately for a DateInterval instance as 96 hours 15 minutes  I did this as follows    interval   new  DateInterval sprintf  PT dH dM   intval  hours      hours   1    60       I didn t care about seconds in my case

User · Answer

To prevent the extra float decimal  i e  50 85 - 50 give 0 850000000852   in my case I just need 2 decimals for money cents    n   50 85   whole   intval  n    fraction    n   100   100

User · Answer

Try it this way    it s easier like this  var    quot 0 98 quot     decimal   strrchr  var  quot   quot      whole no    var- decimal   echo  whole no   echo str replace  quot   quot    quot  quot    decimal

User · Answer

I was having a hard time finding a way to actually separate the dollar amount and the amount after the decimal  I think I figured it out mostly and thought to share if any of yall were having trouble  So basically     if price is 1234 44    whole would be 1234 and decimal would be 44 or  if price is 1234 01    whole would be 1234 and decimal would be 01 or  if price is 1234 10    whole would be 1234 and decimal would be 10   and so forth   price   1234 44    whole   intval  price      1234  decimal1    price -  whole     0 44000000000005 uh oh  that s why it needs     see next line   decimal2   round  decimal1  2      0 44 this will round off the excess numbers  decimal   substr  decimal2  2      44 this removed the first 2 characters  if   decimal    1     decimal   10       Michel s warning is correct    if   decimal    2     decimal   20       if the price is 1234 10    the decimal will be 1    if   decimal    3     decimal   30       so make sure to add these rules too if   decimal    4     decimal   40    if   decimal    5     decimal   50    if   decimal    6     decimal   60    if   decimal    7     decimal   70    if   decimal    8     decimal   80    if   decimal    9     decimal   90     echo  The dollar amount is      whole     and the decimal amount is      decimal

User · Answer

x   1 24   result    x - floor  x    echo  result      24

User · Answer

Just to be different     list  whole   decimal    sscanf 1 5    d  d      CodePad   As an added benefit  it will only split where both sides consist of digits

[php] How to get whole and decimal part of a number?

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