500: extract decimal point

Ok but can you get rid of the decimal point aswell please?

that's what I just changed it to - the second example if $mystring = '321351.2222'; it will return 2222 in $newString

Something a little shorter?

$mystring = '123.456';
$newstring = preg_replace('/[^\.]*\./','',$mystring);
echo $newstring;

Ok I couldn't understand why the echo prooved that the aswers worked but when I try and process(some maths) this number it goes mad - that's because I started off with a number and then your code has converted it to string representaion of.............so could I not have my decimal numbers represented as integer values? Is it possible to convert from string to decimal??

Thanks for helpfull comments so far

provided they are all numbers you should be able to do maths with them - it should implicitly convert them back to numbers

http://au.php.net/manual/en/language.types.string.php#language.types.string.conversion

$mystring = 123.456;
$newstring = $mystring - intval($mystring);
$length = strlen($newstring);
$newstring = substr($newstring,2, ($length+1)) ;
echo "$newstring";

This should work for you:

      $number = 358253.37845;
      printf("%0.0f", $number); //Equals 358253

"%0.0f" = 0 decimal places; if you want 2 decimal places you can change it to "%0.2f".

Tested. Enjoy!

brucepieterse  > the user wants only the decimal part without a dot preceding it not the integer value.

Here's another way to do it.  This treats the value as a number when it strips off the integer part.  This works for positive numbers.  For negative numbers, you need to use ceil() instead of floor().

<?php
       $n = 1/3;
       $d = $n-floor($n);
       echo substr($d,2);

       echo '<p>';
       // or
       echo substr($n-floor($n),2);
?>

Oh, I didn't notice - but instead of floor(), using intval() will provide a universal solution.  I copied that from ygoutham.

$fracpart = substr($n-intval($n),2);

There ya go.  A one liner.

Guys: I want a generic solution...............the answers above for example don't work for 123456789.111111111

Thanks again

why does the following not work?

$mystring = '1234567890.1111111111';
echo $newstring = $mystring - intval($mystring);

$mystring = '1234567890.1111111111';

the problem is the single quote before the value.  remove the quote and then it would work.  you are declaring it to be a string when you want a float variable.

make it like
$mystring = 1234567890.1111111111;

in your case the explode option given above should work like a charm. did you try that??? the problem with such a large number is that php's inherent number handling capacities are going to be limited and therefore a smaller number in terms of the truncated decimal digits.

so if you want the quotes to be retained for a text handling facility then go with RAYNARD7 option which is

#########
<?php
    $mystring = '1234567890.011223344556677';  //i have changed the number alone over here
    $findme  = '.';
    $pos = strpos($mystring, $findme);

    if ($pos === false) {
       $newString = $mystring;
    } else {
       $newString = substr($mystring, $pos +1);
    } // end if

    echo $newString;
?>
#########

and in this instance you would see that it also returns the first zero which would be forgotten by all arithmetic values obtained with mathematical operators (including my option)

this should also work

$mystring = '1234567890.011223344556677';  //pls note the quotes before the numbers
$parts = explode(".", $mystring);
echo "$parts[1]";

which gives a perfect answer

No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I will leave the following recommendation for this question in the Cleanup topic area:
   Accept: ygoutham {http:#18186733}

Any objections should be posted here in the next 4 days. After that time, the question will be closed.

Huji
EE Cleanup Volunteer

I'd suggest that

lorenww  and I also get some of the points, considering our solutions did what was originally asked (before the question changed requirements)