PHP remove commas from numeric strings - php

Question

In PHP, I have an array of variables that are ALL strings. Some of the values stored are numeric strings with commas.
What I need:
A way to trim the commas from strings, and ONLY do this for numeric strings. This isn't as straightforward as it looks. The main reason is that the following fails:
$a = "1,435";
if(is_numeric($a))
$a = str_replace(',', '', $a);
This fails because $a = "1435" is numeric. But $a = "1,435" is not numeric. Because some of the strings I get will be regular sentences with commas, I can't run a string replace on every string.

Answer 1

Do it the other way around:
$a = "1,435";
$b = str_replace( ',', '', $a );
if( is_numeric( $b ) ) {
$a = $b;
}

Answer 2

The easiest would be:
$var = intval(preg_replace('/[^\d.]/', '', $var));
or if you need float:
$var = floatval(preg_replace('/[^\d.]/', '', $var));

Answer 3

Not tested, but probably something like if(preg_match("/^[0-9,]+$/", $a)) $a = str_replace(...)

Answer 4

It sounds like the ideal solution for what you're looking for is filter_var():
$a = filter_var($a, FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND);
(Note that it's using FILTER_VALIDATE_FLOAT instead of FILTER_VALIDATE_INT because that one doesn't currently have a FILTER_FLAG_ALLOW_THOUSAND option).

Answer 5

Try this .this worked for me
number_format(1235.369,2,'.','')
if you use number_format like this
number_format(1235.369,2) answer will be 1,235.37
but if you use like below
number_format(1235.369,2,'.','') answer will be 1235.37
it's removing the "," of "1,235.37"

Answer 6

function cleanData($a) {
if(is_numeric($a)) {
$a = preg_replace('/[^0-9,]/s', '', $a);
}
return $a;
}

Answer 7

If you want to remove commas from numbers inside a string that also contains words, the easiest way I think would be to use preg_replace_callback:
Example:
$str = "Hey hello, I've got 12,500 kudos for you, spend it well"
function cleannr($matches)
{
return str_replace("," , "" , $matches["nrs"]);
}
$str = preg_replace_callback ("/(?P<nrs>[0-9]+,[0-9]+)/" , "cleannr" , $str);
Output:
"Hey hello, I've got 12500 kudos for you, spend it well"
In this case the pattern (regex) differs from the one given in the accepted answer since we don't want to remove the other commas (punctuation).
If we'd use /[0-9,]+/ here instead of /[0-9]+,[0-9]+/ the output would be:
"Hey hello I've got 12500 kudos for you spend it well"

Answer 8

How about this:
/**
* This will parse the money string
*
* For example 1, 234, 456.00 will be converted to 123456.00
*
* #return
*/
function parseMoney(string $money) : float
{
$money = preg_replace('/[ ,]+/', '', $money);
return number_format((float) $money, 2, '.', '');
}
Example;
parseMoney('-1, 100, 000.01'); //-1100000.01