need code snippet to verify input strings

[Mairhtin O'Feannag]

Hello,

I'm obviously a newbie, and since I detest re-inventing the wheel, can
someone show me/give me a snippet that will verify that an input string is
a numeric value? I'm using DB2 and would like to verify that a string is
integer, dec(x,y) etc. Dates I've been able to find a nice routine
(snippet) for, but numeric values seem to elude my searches.

Also, any suggestions on what one considers to be a *GOOD* snipet site
would help as well. :)

TIA,

Mairhtin

[Janwillem Borleffs]

Re: need code snippet to verify input strings

Mairhtin O'Feannag wrote:

Dates I've been able to find
a nice routine (snippet) for, but numeric values seem to elude my
searches.
>

http://www.php.net/manual/en/function.is-numeric.php

JW

[Mairhtin O'Feannag]

Re: need code snippet to verify input strings

"Janwillem Borleffs" <jw@jwscripts.c omwrote in news:451ad4ab$0 $20623
$dbd4d001@news. euronet.nl:

http://www.php.net/manual/en/function.is-numeric.php

Okay, that's a good resource, and a good start. But when testing
various values, I get the output :

value of x is:1
value of id is:222
value of id is:


where I would expect x and the second id to be 0, not blank. The test,
when it succeeds, displays 1, but when it fails, it displays nothing.
Test :

$testamt = $_POST["amount"];
$x = is_numeric($tes tamt);
echo "</br>";
echo "value of x is:";
echo $x;

$id = (int) $_POST["amount"];
echo "</br>";
echo "value of id is:";
echo $id;

$id = is_numeric($_PO ST["date"]);
echo "</br>";
echo "value of id is:";
echo $id;

Date is obviously not numeric, in that it contains the "/" character.

Any thoughts?

Mairhtin

P.S. if you see something OBVIOUS, please be gentle, I'm a newbie!!!

[Colin Fine]

Re: need code snippet to verify input strings

Mairhtin O'Feannag wrote:

"Janwillem Borleffs" <jw@jwscripts.c omwrote in news:451ad4ab$0 $20623
$dbd4d001@news. euronet.nl:
>

>http://www.php.net/manual/en/function.is-numeric.php

>
Okay, that's a good resource, and a good start. But when testing
various values, I get the output :
>
value of x is:1
value of id is:222
value of id is:
>
>
where I would expect x and the second id to be 0, not blank. The test,
when it succeeds, displays 1, but when it fails, it displays nothing.
Test :
>
$testamt = $_POST["amount"];
$x = is_numeric($tes tamt);
echo "</br>";
echo "value of x is:";
echo $x;
>
$id = (int) $_POST["amount"];
echo "</br>";
echo "value of id is:";
echo $id;
>
$id = is_numeric($_PO ST["date"]);
echo "</br>";
echo "value of id is:";
echo $id;
>
Date is obviously not numeric, in that it contains the "/" character.
>
Any thoughts?
>
Mairhtin
>
P.S. if you see something OBVIOUS, please be gentle, I'm a newbie!!!

PHP has a distinct type 'boolean'. 1, like all non-zero values, is
converted to TRUE in boolean context, but it is not the same as TRUE. 0
is converted to FALSE in boolean context, but it is not the same as FALSE.

It would appear from your test that 'echo' reports True as '1' and False
as blank. I cannot find anything in the on-line manual that says how it
should behave.

So - don't be worried that it is not reporting what you expect:

if (is_numeric($_i d)) {
...
} else {
...
}

will work fine.

Colin

Colin

[Mairhtin O'Feannag]

Re: need code snippet to verify input strings

Thank you Colin. I was expecting 1 and 0 as true and false respectively.
But the test works, so who am I to complain? :)

Thanks again



Colin Fine <news@kindness. demon.co.ukwrot e in
news:efov32$5vd $1$8302bc10@new s.demon.co.uk:

Mairhtin O'Feannag wrote:

>"Janwillem Borleffs" <jw@jwscripts.c omwrote in
>news:451ad4ab$ 0$20623 $dbd4d001@news. euronet.nl:
>>

>>http://www.php.net/manual/en/function.is-numeric.php

>>
>Okay, that's a good resource, and a good start. But when testing
>various values, I get the output :
>>
>value of x is:1
>value of id is:222
>value of id is:
>>
>>
>where I would expect x and the second id to be 0, not blank. The
>test, when it succeeds, displays 1, but when it fails, it displays
>nothing. Test :
>>
> $testamt = $_POST["amount"];
> $x = is_numeric($tes tamt);
> echo "</br>";
> echo "value of x is:";
> echo $x;
>>
> $id = (int) $_POST["amount"];
> echo "</br>";
> echo "value of id is:";
> echo $id;
>>
> $id = is_numeric($_PO ST["date"]);
> echo "</br>";
> echo "value of id is:";
> echo $id;
>>
>Date is obviously not numeric, in that it contains the "/" character.
>>
>Any thoughts?
>>
>Mairhtin
>>
>P.S. if you see something OBVIOUS, please be gentle, I'm a newbie!!!

>
PHP has a distinct type 'boolean'. 1, like all non-zero values, is
converted to TRUE in boolean context, but it is not the same as TRUE.
0 is converted to FALSE in boolean context, but it is not the same as
FALSE.
>
It would appear from your test that 'echo' reports True as '1' and
False as blank. I cannot find anything in the on-line manual that says
how it should behave.
>
So - don't be worried that it is not reporting what you expect:
>
if (is_numeric($_i d)) {
...
} else {
...
}
>
will work fine.
>
Colin
>
Colin
>