PHP remove decimal from number string

Question

i have an algorithym that gives back a number with a decimal point (I.E. ".57"). What I would like to do is just get the "57" without the decimal.

I have used eregi_replace and str_replace and neither worked!

$one = ".57";
$two = eregi_replace(".", "", $one);
print $two;

sorry, we will need more exact specifications about input and output... — Paul, Jan 19 '11 at 18:30
possible duplicate of [How to remove the first character in php](http://stackoverflow.com/questions/4638569/how-to-remove-the-first-character-in-php) — Gordon, Jan 19 '11 at 18:31

Jonah · Accepted Answer · 2011-01-19T18:43:53.273

8

$one = '.57';
$two = str_replace('.', '', $one);
echo $two;

That works. 100% tested. BTW, all ereg(i)_* functions are depreciated. Use preg_* instead if you need regex.

edited Jan 19 '11 at 18:43

answered Jan 19 '11 at 18:29

Jonah

9,991
5
45
79

Brad Christie · Answer 2 · 2011-01-19T19:21:21.920

5

Method       Result   Command
x100         57       ((float)$one * 100))
pow/strlen   57       ((float)$one * pow(10,(strlen($one)-1))))
substr       57       substr($one,1))
trim         57       ltrim($one,'.'))
str_replace  57       str_replace('.','',$one))

Just shwoing some other methods of getting the same result

edited Jan 19 '11 at 19:21

answered Jan 19 '11 at 18:32

Brad Christie

100,477
16
156
200

Clever, but it wouldn't work if he got `.572`. The result would be 57. – Jonah Jan 19 '11 at 18:37
@Jonah: Fixed. Showed a few other alternatives, too. – Brad Christie Jan 19 '11 at 19:21

score 2 · Answer 3 · answered Jan 19 '11 at 18:29

2

$number = ltrim($number, '.');

That removes all trailing dots.

answered Jan 19 '11 at 18:29

NikiC

100,734
37
191
225

1

Good, but we don't know if it's always on the (left) edge. @Matthew is it? – Jonah Jan 19 '11 at 18:30

score 1 · Answer 4 · answered Jan 19 '11 at 18:30

1

You say you've tried using str_replace without any luck, but the following code works perfectly:

<?php
    $one = '.57';
    $two = str_replace('.', '', $one);
    echo $two;
?>

answered Jan 19 '11 at 18:30

John Parker

54,048
11
129
129

score 1 · Answer 5 · answered Jan 19 '11 at 18:35

I have used eregi_replace and str_replace and neither worked!

Well... ereg_replace() won't work cause it's using regular expresions, and . (dot) character has a special meaning: everything (so you've replaced every character into "" (the empty string)).

But str_replace() works absolutely fine in this case.

Here's a live test: http://ideone.com/xKG7s

Matt Lowden · Answer 6 · 2011-01-19T18:48:15.560

0

This would return as an integer.

$two = (integer) trim('.', $one);

edited Jan 19 '11 at 18:48

answered Jan 19 '11 at 18:31

Matt Lowden

2,586
17
19

PHP remove decimal from number string

6 Answers6