Re: [PHP] Verifying a certain amount of numbers
if(!ereg('^[0-9]{6}$',$string) die('not six numbers');
you might want to trim off white space first.
Ron Allen wrote:
I would like to know how to verify that there are 6 numbers (only numbers in
a field)
that will be submitted to a database? Any clues!
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Verifying a certain amount of numbers
If you care about performance at all, try and find away around the
problem without regular expressions...
I tested
if( (strlen($str) == 6) (is_int($str)) )
vs
if(ereg('^[0-9]{6}$',$str))
...on my LAN test server with 10 iterations, and the regexp was
nearly 2 times slower than the first solution. IMHO, it's also faster
to read and modify the first solution too -- especially for those with
minimal regexp experience.
Justin
On Wednesday, July 16, 2003, at 11:07 PM, Ron Allen wrote:
I would like to know how to verify that there are 6 numbers (only
numbers in
a field)
that will be submitted to a database? Any clues!
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Verifying a certain amount of numbers
Justin French [EMAIL PROTECTED] wrote:
If you care about performance at all, try and find away around the
problem without regular expressions...
I tested
if( (strlen($str) == 6) (is_int($str)) )
vs
if(ereg('^[0-9]{6}$',$str))
...on my LAN test server with 10 iterations, and the regexp was
nearly 2 times slower than the first solution. IMHO, it's also faster
Excellent point! I find my self using regex's a bit to often when there
are other solutions available.
btw, have you ever tested the difference between
if(ereg('^[0-9]{6}$',$str))
if(preg_grep('^[0-9]{6}$',$str))
I've been meaning to find out advantages/disadvantages with PERL vs.
POSIX compatible.
Curt.
--
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Verifying a certain amount of numbers
Curt Zirzow [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Excellent point! I find my self using regex's a bit to often when there
are other solutions available.
btw, have you ever tested the difference between
if(ereg('^[0-9]{6}$',$str))
if(preg_grep('^[0-9]{6}$',$str))
I've been meaning to find out advantages/disadvantages with PERL vs.
POSIX compatible.
Without getting too far astray from the real subject, I was once writing a
script opening a textfile and modifying the whole contents to create a new
file, using POSIX compatible expressions. My script timed out (30sec+) at
some 400kb. I read Perl compatible was faster, and so I modified my script
to use those. Result : done in a couple of secs.
I bet it depends on the type of expression (these were a bunch of replaces)
but for larger input or many iterations I'd rather use Perl compatible...
--
[Win2000 | Apache/1.3.23]
[PHP/4.2.3 | MySQL/3.23.53]
Ivo Fokkema
PHP MySQL programmer
Leiden University Medical Centre
Netherlands
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Verifying a certain amount of numbers
-Original Message-
From: Curt Zirzow [mailto:[EMAIL PROTECTED]
Sent: 16 July 2003 15:17
Justin French [EMAIL PROTECTED] wrote:
If you care about performance at all, try and find away around the
problem without regular expressions...
I tested
if( (strlen($str) == 6) (is_int($str)) )
vs
if(ereg('^[0-9]{6}$',$str))
...on my LAN test server with 10 iterations, and the regexp was
nearly 2 times slower than the first solution. IMHO, it's
also faster
Excellent point! I find my self using regex's a bit to often
when there
are other solutions available.
btw, have you ever tested the difference between
if(ereg('^[0-9]{6}$',$str))
if(preg_grep('^[0-9]{6}$',$str))
The first will work and the second won't?
Seriously, I think you mean:
if (preg_match('/^[0-9]{6}$/', $str))
Having said which, a quick run on my (rather ancient and slow Windows NT)
system with the above tests and 1,000,000 iterations of each reveals:
Succeeding ereg: 21.1589909792
Succeeding preg_match(): 14.6125850677
Failing ereg(): 21.2370660305
Failing preg_match(): 13.5106118917
Cheers!
Mike
-
Mike Ford, Electronic Information Services Adviser,
Learning Support Services, Learning Information Services,
JG125, James Graham Building, Leeds Metropolitan University,
Beckett Park, LEEDS, LS6 3QS, United Kingdom
Email: [EMAIL PROTECTED]
Tel: +44 113 283 2600 extn 4730 Fax: +44 113 283 3211
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Verifying a certain amount of numbers
I'm pretty sure there will be a problem with using the is_int()
function. A similar problem was discussed a few weeks ago on this list
and is_int() will return true for a number like 1000e2. The e being
treated as an exponential representation of an integer.
It might be more reliable to add or subtract 0 from the string and
see if it changes. Something like:
if( (strlen($str)==6) ( strcmp(($str-0),$str)==0))
It may just be easier to use ereg if you won't be looping through a
bunch of numbers. I don't know what the performance difference is
between the above function and ereg or preg.
On Wednesday, July 16, 2003, at 09:43 AM, Justin French wrote:
I tested
if( (strlen($str) == 6) (is_int($str)) )
vs
if(ereg('^[0-9]{6}$',$str))
--
Brent Baisley
Systems Architect
Landover Associates, Inc.
Search Advisory Services for Advanced Technology Environments
p: 212.759.6400/800.759.0577
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Verifying a certain amount of numbers
Brent Baisley [EMAIL PROTECTED] wrote: I'm pretty sure there will be a problem with using the is_int() function. A similar problem was discussed a few weeks ago on this list and is_int() will return true for a number like 1000e2. The e being treated as an exponential representation of an integer. I thought that was is_numeric(), I'll have to test that. It might be more reliable to add or subtract 0 from the string and see if it changes. Something like: if( (strlen($str)==6) ( strcmp(($str-0),$str)==0)) True that should work but it is kinda confusing code for a newbie. It doesnt really explain well what your doing. -- Brent Baisley Systems Architect Landover Associates, Inc. Search Advisory Services for Advanced Technology Environments p: 212.759.6400/800.759.0577 Curt -- -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Verifying a certain amount of numbers
Ford, Mike [LSS] [EMAIL PROTECTED] wrote:
-Original Message-
From: Curt Zirzow [mailto:[EMAIL PROTECTED]
Sent: 16 July 2003 15:17
Justin French [EMAIL PROTECTED] wrote:
If you care about performance at all, try and find away around the
problem without regular expressions...
I tested
if( (strlen($str) == 6) (is_int($str)) )
vs
if(ereg('^[0-9]{6}$',$str))
...on my LAN test server with 10 iterations, and the regexp was
nearly 2 times slower than the first solution. IMHO, it's
also faster
Excellent point! I find my self using regex's a bit to often
when there
are other solutions available.
btw, have you ever tested the difference between
if(ereg('^[0-9]{6}$',$str))
if(preg_grep('^[0-9]{6}$',$str))
The first will work and the second won't?
Seriously, I think you mean:
if (preg_match('/^[0-9]{6}$/', $str))
yea, I havn't used preg_* much, i wasn't aware you needed the //.
Having said which, a quick run on my (rather ancient and slow Windows NT)
system with the above tests and 1,000,000 iterations of each reveals:
Succeeding ereg: 21.1589909792
Succeeding preg_match(): 14.6125850677
Failing ereg(): 21.2370660305
Failing preg_match(): 13.5106118917
I wonder if preg treats [0-9] vs. \d differently:
if (preg_match('/^\d{6}$/', $str))
Cheers!
Mike
Thanks,
Curt.
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Verifying a certain amount of numbers
Yes, use preg_match(/^[0-9]{6}$/,$str) since it takes care of both
number and length.
You dont want to you is_numeric(), because that will match 4e5, etc..etc..
Brent Baisley wrote:
I'm pretty sure there will be a problem with using the is_int()
function. A similar problem was discussed a few weeks ago on this list
and is_int() will return true for a number like 1000e2. The e
being treated as an exponential representation of an integer.
It might be more reliable to add or subtract 0 from the string and
see if it changes. Something like:
if( (strlen($str)==6) ( strcmp(($str-0),$str)==0))
It may just be easier to use ereg if you won't be looping through a
bunch of numbers. I don't know what the performance difference is
between the above function and ereg or preg.
On Wednesday, July 16, 2003, at 09:43 AM, Justin French wrote:
I tested
if( (strlen($str) == 6) (is_int($str)) )
vs
if(ereg('^[0-9]{6}$',$str))
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Verifying a certain amount of numbers
Justin French [EMAIL PROTECTED] wrote: If you care about performance at all, try and find away around the problem without regular expressions... I tested if( (strlen($str) == 6) (is_int($str)) ) I did some more tests on this problem is that $str is still considered a string and not an integer here is my test script and results: ?php // is_int() testing // standard string $str = 123; if (is_int($str)) print $str: yes \n; else print $str: no \n; //cast to integer $str = (integer)123; if (is_int($str)) print $str: yes \n; else print $str: no \n; // implied cast to integer $str = 123; $str += 0; if (is_int($str)) print $str: yes \n; else print $str: no \n; // force to be integer $str = 123; settype($str, 'integer'); if (is_int($str)) print $str: yes \n; else print $str: no \n; /* Results: 123: no 123: yes 123: yes 123: yes */ ? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Verifying a certain amount of numbers
On Thursday, July 17, 2003, at 12:17 AM, Curt Zirzow wrote:
Excellent point! I find my self using regex's a bit to often when there
are other solutions available.
btw, have you ever tested the difference between
if(ereg('^[0-9]{6}$',$str))
if(preg_grep('^[0-9]{6}$',$str))
I've been meaning to find out advantages/disadvantages with PERL vs.
POSIX compatible.
Hi,
I haven't, but feel free to do your own :)
Use the sample found on http://au.php.net/microtime
Justin
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
