is there a quick way to remove non numeric chars

[chris]

is there a quick and easy way to check a string for non numeric characters ?

i have thought of making a routine to check each character to confirm it is
0 - 9 but was wondering if there was a quicker way???

[Michael Fesser]

Re: is there a quick way to remove non numeric chars

.oO(chris)
[color=blue]
>is there a quick and easy way to check a string for non numeric characters ?
>
>i have thought of making a routine to check each character to confirm it is
>0 - 9 but was wondering if there was a quicker way???[/color]

For example regular expressions:

$isNonNumeric = preg_match('#[^\d]#', $yourString);

Micha

[chris]

Re: is there a quick way to remove non numeric chars

that didnt seem to work But it gives me something to go on with

thanks

"Michael Fesser" <netizen@gmx.ne t> wrote in message
news:t66pq013dr djjfteq93qsnt2v e2683gel7@4ax.c om...[color=blue]
> .oO(chris)
>[color=green]
>>is there a quick and easy way to check a string for non numeric characters
>>?
>>
>>i have thought of making a routine to check each character to confirm it
>>is
>>0 - 9 but was wondering if there was a quicker way???[/color]
>
> For example regular expressions:
>
> $isNonNumeric = preg_match('#[^\d]#', $yourString);
>
> Micha[/color]

[Hilarion]

Re: is there a quick way to remove non numeric chars

> is there a quick and easy way to check a string for non numeric characters ?[color=blue]
>
> i have thought of making a routine to check each character to confirm it is 0 - 9 but was wondering if there was a quicker way???[/color]

Do you want to only check if there are non-numeric chars (as stated in message
body), or remove them (as stated in message subject)?
If only check, then use "is_numeric " function. If replace, then you can
use some regular expressions replacement like:

$result = ereg_replace( '[^0-9]+', '', $source );


Hilarion

[Daedalus]

Re: is there a quick way to remove non numeric chars

> $result = ereg_replace( '[^0-9]+', '', $source );[color=blue]
>[/color]

From the manual page:
"Note: preg_replace(), which uses a Perl-compatible regular expression
syntax, is often a faster alternative to ereg_replace(). "

[Peter]

Re: is there a quick way to remove non numeric chars

try this

<?
$str="222223433 934";

if (ctype_digit($s tr))
{
print "The string is all digits";
}
else
{
print "the string has one or more characters that are not digits";
}
?>


chris wrote:[color=blue]
> that didnt seem to work But it gives me something to go on with
>
> thanks
>
> "Michael Fesser" <netizen@gmx.ne t> wrote in message
> news:t66pq013dr djjfteq93qsnt2v e2683gel7@4ax.c om...
>[color=green]
>>.oO(chris)
>>
>>[color=darkred]
>>>is there a quick and easy way to check a string for non numeric characters
>>>?
>>>
>>>i have thought of making a routine to check each character to confirm it
>>>is
>>>0 - 9 but was wondering if there was a quicker way???[/color]
>>
>>For example regular expressions:
>>
>>$isNonNumer ic = preg_match('#[^\d]#', $yourString);
>>
>>Micha[/color]
>
>
>[/color]

[Hilarion]

Re: is there a quick way to remove non numeric chars

> "Note: preg_replace(), which uses a Perl-compatible regular expression[color=blue]
> syntax, is often a faster alternative to ereg_replace(). "[/color]

That's true (but irrelevant if we are talking about user input validation).
And AFAIK preg functions are binary safe, where ereg functions are not
(which may be much more important).

But I do not know Perl regular expressions syntax, and personaly think that
posix syntax is easier to read.

Hilarion

[Kelv]

Re: is there a quick way to remove non numeric chars

chris wrote:[color=blue]
> is there a quick and easy way to check a string for non numeric characters ?
>
> i have thought of making a routine to check each character to confirm it is
> 0 - 9 but was wondering if there was a quicker way???[/color]

preg_match("%[^0-9]%",$string);

If there's anything other than 0-9 in $string, the condition returns true.

Kelv :)

--
LoHost

http://www.lohost.com

[Michael Fesser]

Re: is there a quick way to remove non numeric chars

.oO(Hilarion)
[color=blue]
>But I do not know Perl regular expressions syntax, and personaly think that
>posix syntax is easier to read.[/color]

The basic syntax is the same, except for the delimiters, which are
necessary in PCRE. Anything else are extensions, which make PCRE much
more flexible and powerful.

Micha

[d]

Re: is there a quick way to remove non numeric chars

No-one reads the PHP manual here it seems ;) There is a built-in function
for doing this:

if (ctype_digit($s tring)) {
// $string contains only numbers, no other characters
}

"chris" <someone@here.c om> wrote in message
news:41ac97c6$1 @funnel.arach.n et.au...[color=blue]
> is there a quick and easy way to check a string for non numeric characters
> ?
>
> i have thought of making a routine to check each character to confirm it
> is 0 - 9 but was wondering if there was a quicker way???
>[/color]