Re: [PHP] ltrim behavior.
At 3:38 PM -0400 3/11/09, Robert Cummings wrote:
Just because I'm a nice guy... :)
Yeah, me too -- here are three routines I use for cutting the right,
left and middle portions of strings. These were keyword routines I
used in FutureBasic -- they seemed to make sense to me so I carried
them into php.
?php
// == returns the right-most number of characters from a string
// $string = 123456789
// right($string, 3) returns 123
function right($string, $length)
{
$str = substr($string, -$length, $length);
return $str;
}
// == returns the left-most number of characters from a string
// $string = 123456789
// left($string, 3) returns 789
function left($string, $length)
{
$str = substr($string, 0, $length);
return $str;
}
// == returns the middle number of characters from a string
starting from the left
// $string = 123456789
// mid($string, 3, 4) returns 4567
function mid($string, $left_start, $length)
{
$str = substr($string, $left_start, $length);
return $str;
}
?
Cheers,
tedd
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Re: [PHP] ltrim behavior.
At 5:03 PM -0400 3/11/09, Peter van der Does wrote: Thanks and I apologize for the stupid question. The only stupid question is the one that's not asked. The ltrim() caught me the first time I used it too. I was thinking it was trim this string off the left when it was trim these characters off the left. Cheers, tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] ltrim behavior.
On Thu, Mar 12, 2009 at 9:47 AM, tedd tedd.sperl...@gmail.com wrote:
At 3:38 PM -0400 3/11/09, Robert Cummings wrote:
Just because I'm a nice guy... :)
Yeah, me too -- here are three routines I use for cutting the right, left
and middle portions of strings. These were keyword routines I used in
FutureBasic -- they seemed to make sense to me so I carried them into php.
?php
// == returns the right-most number of characters from a string
// $string = 123456789
// right($string, 3) returns 123
function right($string, $length)
{
$str = substr($string, -$length, $length);
return $str;
}
// == returns the left-most number of characters from a string
// $string = 123456789
// left($string, 3) returns 789
function left($string, $length)
{
$str = substr($string, 0, $length);
return $str;
}
// == returns the middle number of characters from a string starting
from the left
// $string = 123456789
// mid($string, 3, 4) returns 4567
function mid($string, $left_start, $length)
{
$str = substr($string, $left_start, $length);
return $str;
}
?
Cheers,
tedd
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Tedd,
Just because I'm a nit-picker, your comments are wrong. Exchange the right
and left comments and it's right.
Steve.
Re: [PHP] ltrim behavior.
At 10:18 AM -0400 3/12/09, Steve Holmes wrote: On Thu, Mar 12, 2009 at 9:47 AM, tedd mailto:tedd.sperl...@gmail.comtedd.sperl...@gmail.com wrote: Tedd, Just because I'm a nit-picker, your comments are wrong. Exchange the right and left comments and it's right. Steve. Steve: No, my routines work for me -- I'm dyslexic. :-) Seriously, I use these routines all the time and never realized that they were reversed. Thanks (I think), tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] ltrim behavior.
On Thu, 2009-03-12 at 12:46 -0400, tedd wrote: At 10:18 AM -0400 3/12/09, Steve Holmes wrote: On Thu, Mar 12, 2009 at 9:47 AM, tedd mailto:tedd.sperl...@gmail.comtedd.sperl...@gmail.com wrote: Tedd, Just because I'm a nit-picker, your comments are wrong. Exchange the right and left comments and it's right. Steve. Steve: No, my routines work for me -- I'm dyslexic. :-) *lol* Job security through dyslexic obscurity!! ;) Cheers, Rob. -- http://www.interjinn.com Application and Templating Framework for PHP -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] ltrim behavior.
This might be old for some of you but I never encountered it until today and I would like to know why this is happening. Here's the situation: php $a='data[options][name]'; php echo ltrim($a,'data['); options][name] Just as I expected. Next one: php $a='options[options][name]'; php echo ltrim($a,'options['); ][name] UH, what? Not exactly what I expected. This works: php $a='options[options][name]'; php echo ltrim(ltrim($a,'options'),'['); options][name] Can somebody explain the second behavior? Is this a known bug in PHP, I'm running PHP 5.2.6 on Ubuntu. -- Peter van der Does GPG key: E77E8E98 WordPress Plugin Developer http://blog.avirtualhome.com GetDeb Package Builder/GetDeb Site Coder http://www.getdeb.net - Software you want for Ubuntu -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] ltrim behavior.
On Wed, Mar 11, 2009 at 03:07:18PM -0400, Peter van der Does wrote: This might be old for some of you but I never encountered it until today and I would like to know why this is happening. Here's the situation: php $a='data[options][name]'; php echo ltrim($a,'data['); options][name] Just as I expected. Next one: php $a='options[options][name]'; php echo ltrim($a,'options['); ][name] UH, what? Not exactly what I expected. This works: php $a='options[options][name]'; php echo ltrim(ltrim($a,'options'),'['); options][name] Can somebody explain the second behavior? Is this a known bug in PHP, I'm running PHP 5.2.6 on Ubuntu. Take a look at the documentation for ltrim(): http://us2.php.net/manual/en/function.ltrim.php The string you're including as the second parameter to ltrim() is the *characters* you want to trim on, not the *character pattern*. If you think about it that way, it will make sense. Also one of the examples on the referenced documentation page does something similar to what you've cited. Work through that example, and you'll see. Paul -- Paul M. Foster -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] ltrim behavior.
On Wed, 2009-03-11 at 15:07 -0400, Peter van der Does wrote:
php $a='data[options][name]';
php echo ltrim($a,'data[');
options][name]
Just as I expected.
Next one:
php $a='options[options][name]';
php echo ltrim($a,'options[');
][name]
UH, what?
Not exactly what I expected.
This works:
php $a='options[options][name]';
php echo ltrim(ltrim($a,'options'),'[');
options][name]
It doesn't trim strings, it trims characters. The second argument is a
list of characters. I'm surprised this has worked for you up till now. I
think most people would use the following to do what you want:
?php
echo preg_replace( '#^options\[#', '', $a )
?
Or they would do test and strip:
?php
if( substr( $a, 0, 8 ) === 'options[' )
{
echo substr( $a, 8 );
}
?
Or maybe:
?php
if( preg_match( '#^options\[#', $a ) )
{
echo substr( $a, 8 );
}
?
Cheers,
Rob.
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Application and Templating Framework for PHP
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Re: [PHP] ltrim behavior.
On Wed, 2009-03-11 at 15:34 -0400, Robert Cummings wrote:
On Wed, 2009-03-11 at 15:07 -0400, Peter van der Does wrote:
php $a='data[options][name]';
php echo ltrim($a,'data[');
options][name]
Just as I expected.
Next one:
php $a='options[options][name]';
php echo ltrim($a,'options[');
][name]
UH, what?
Not exactly what I expected.
This works:
php $a='options[options][name]';
php echo ltrim(ltrim($a,'options'),'[');
options][name]
It doesn't trim strings, it trims characters. The second argument is a
list of characters. I'm surprised this has worked for you up till now. I
think most people would use the following to do what you want:
?php
echo preg_replace( '#^options\[#', '', $a )
?
Or they would do test and strip:
?php
if( substr( $a, 0, 8 ) === 'options[' )
{
echo substr( $a, 8 );
}
?
Or maybe:
?php
if( preg_match( '#^options\[#', $a ) )
{
echo substr( $a, 8 );
}
?
Just because I'm a nice guy... :) here's the generic strip:
?php
echo preg_replace( '#^[[:alpha:]]+[[:alnum:]]*\[#', '', $a );
?
Cheers,
Rob.
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Application and Templating Framework for PHP
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Re: [PHP] ltrim behavior.
On Wed, 11 Mar 2009 15:28:04 -0400 Paul M Foster pa...@quillandmouse.com wrote: On Wed, Mar 11, 2009 at 03:07:18PM -0400, Peter van der Does wrote: This might be old for some of you but I never encountered it until today and I would like to know why this is happening. Here's the situation: php $a='data[options][name]'; php echo ltrim($a,'data['); options][name] Just as I expected. Next one: php $a='options[options][name]'; php echo ltrim($a,'options['); ][name] UH, what? Not exactly what I expected. This works: php $a='options[options][name]'; php echo ltrim(ltrim($a,'options'),'['); options][name] Can somebody explain the second behavior? Is this a known bug in PHP, I'm running PHP 5.2.6 on Ubuntu. Take a look at the documentation for ltrim(): http://us2.php.net/manual/en/function.ltrim.php The string you're including as the second parameter to ltrim() is the *characters* you want to trim on, not the *character pattern*. If you think about it that way, it will make sense. Also one of the examples on the referenced documentation page does something similar to what you've cited. Work through that example, and you'll see. Paul OK, the light bulb went on now. I did see it was characters, and not a string, but for some reason it didn't get in my brain what the consequence was. Thanks and I apologize for the stupid question. -- Peter van der Does GPG key: E77E8E98 IRC: Ganseki on irc.freenode.net Blog: http://blog.avirtualhome.com Forums: http://forums.avirtualhome.com Jabber ID: pvanderd...@gmail.com GetDeb Package Builder http://www.getdeb.net - Software you want for Ubuntu -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
