is there a quick way to remove non numeric chars

try this

<?
$str="222223433934";

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


chris wrote:
> that didnt seem to work But it gives me something to go on with
>
> thanks
>
> "Michael Fesser" <netizen@gmx.net> wrote in message
> news:t66pq013drdjjfteq93qsnt2ve2683gel7@4ax.com...
>
>>.oO(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???
>>
>>For example regular expressions:
>>
>>$isNonNumeric = preg_match('#[^\d]#', $yourString);
>>
>>Micha
>
>
>

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???

.oO(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???

For example regular expressions:

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

Micha

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

thanks

"Michael Fesser" <netizen@gmx.net> wrote in message
news:t66pq013drdjjfteq93qsnt2ve2683gel7@4ax.com...
> .oO(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???
>
> For example regular expressions:
>
> $isNonNumeric = preg_match('#[^\d]#', $yourString);
>
> Micha

> 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???

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

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

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

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

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

chris wrote:
> 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???

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

.oO(Hilarion)

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

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

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

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

"chris" <someone@here.com> wrote in message
news:41ac97c6$1@funnel.arach.net.au...
> 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???
>