php-general Digest 3 Jul 2012 18:24:46 -0000 Issue 7876
Topics (messages 318382 through 318389):
Re: How does this code work?
318382 by: Jim Lucas
318383 by: Robert Williams
318385 by: tamouse mailing lists
Re: PDO Prevent duplicate field names?
318384 by: tamouse mailing lists
Re: Destructor not called when extending SimpleXMLElement
318386 by: Nick Chalk
Re: Way to test if variable contains valid date
318387 by: shiplu
318388 by: Erwin Poeze
exec to launch putty.exe for telnet
318389 by: Devang Patel
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----------------------------------------------------------------------
--- Begin Message ---
On 7/2/2012 7:15 PM, Robert Williams wrote:
I found this code in a user comment in the PHP docs for htmlentities():
<?php
function xml_character_encode($string, $trans='') {
$trans = (is_array($trans)) ? $trans :
get_html_translation_table(HTML_ENTITIES, ENT_QUOTES);
foreach ($trans as $k=>$v)
$trans[$k]= "&#".ord($k).";";
return strtr($string, $trans);
}
?>
It seems to work. For instance, this (assuming UTF-8 encoding):
echo xml_character_encode('Château');
echo "\n";
echo xml_character_encode('Ch&teau');
Yields this:
Château
Ch&teau
My question is, *how* does it work? It makes sense right up to the return statement.
According to the docs for strstr(), when a non-string is passed in as the needle, it's,
"converted to an integer and applied as the ordinal value of a character."
First, an array-to-int conversion is undefined, though it seems to produce 1 on my copy
of PHP. Now, I'm not quite sure how to interpret the last part of that statement from the
docs, but I take it that the ultimate value supplied to strstr() is going to be either
'1' (the character value of the integer value of the array) or '49' (the ordinal value of
the character '1'). Whatever, neither one makes sense to look for in the haystack, so I'm
obviously missing something.
I think you missed something here...
The above function uses strtr() not strstr()
http://php.net/strtr
http://php.net/strstr
Perhaps it's just late-Monday slowness on my part, but what's going on here? I
have no intention of using this code, but I'd sure like to understand how it
works!
Regards,
Bob
--
Robert E. Williams, Jr.
Associate Vice President of Software Development
Newtek Businesss Services, Inc. -- The Small Business Authority
https://www.newtekreferrals.com/rewjr
http://www.thesba.com/
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--- End Message ---
--- Begin Message ---
On Jul 2, 2012, at 22:15, "Jim Lucas" <li...@cmsws.com> wrote:
> I think you missed something here...
>
> The above function uses strtr() not strstr()
Wow. I knew there had to be a simple, logical explanation (there was), that it
would likely be one of those stupid things that I'd spot in two seconds the
next morning (it was). That didn't stop me, however, from spending the last few
hours hashing it over in the back of my mind, trying to figure out what magical
power could make strstr() return content that is not in the haystack.
I feel like an idiot now, but at the same time, I am greatly relieved that all
is right with the world, that the logic I've grown so accustomed to in thirty
years of programming had not gone to voodoo. Thank you for that :-).
Hmm, I wonder if those thirty years are having a different sort of impact on
me, in the form of decaying eyesight....
--
Bob Williams
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--- End Message ---
--- Begin Message ---
On Tue, Jul 3, 2012 at 2:31 AM, Robert Williams <rewilli...@thesba.com> wrote:
> On Jul 2, 2012, at 22:15, "Jim Lucas" <li...@cmsws.com> wrote:
> Hmm, I wonder if those thirty years are having a different sort of impact on
> me, in the form of decaying eyesight....
I've had to tweak up the default fonts on things... *sigh*
--- End Message ---
--- Begin Message ---
On Mon, Jul 2, 2012 at 5:38 PM, Scott Baker <bak...@canbytel.com> wrote:
> It was my mistake, and the SQL was easily fixed. But it woulda been nice
> to have PHP realize there was a dupe when it was building that array to
> return to me.
This is just not a province of PHP. What sort of behaviour would one
expect PHP to do given this scenario? It is surely not an error in
every case; I can see some code relying on this exact behaviour.
Making it some sort of option in PHP increases the complexity a great
deal, not only in trying to determine how to design and then *change*
the API to accommodate it, but in figuring out what exactly one might
*do*. Since SQL is a completely separate language from PHP, it makes
much more sense to learn to deal with these thing separately, and
understand what your SQL is doing. Indeed, SQL will happily return
multiple columns with the same column name; you must be aware of this
when writing it.
--- End Message ---
--- Begin Message ---
Thanks Erwin and Matijn.
On 2 July 2012 17:32, Matijn Woudt <tijn...@gmail.com> wrote:
> This is most likely a bug in PHP. A deconstructor is called when there
> are no references left to the object. Since this class uses the libXML
> library, it is likely that there are still references from the libXML
> open on the object, which is why it will never be destroyed.
> Anyway, you should report this bug to the PHP devs (at bugs.php.net).
Yes, that sounds plausible. As a quick hack, I tried adding a
destructor to the SimpleXMLElement extension, but that wasn't called
either.
I'll submit a bug report.
> If you really need this, it's probably best to create a class that
> does not really extend SimpleXMLElement, but you create one inside the
> constructor, and just forward all function calls to the
> SimpleXMLElement object you've created in the constructor.
I've been playing with that today, and it looks like a workable solution.
Thanks for your help!
Nick.
--
Nick Chalk.
Loadbalancer.org Ltd.
Phone: +44 (0)870 443 8779
http://www.loadbalancer.org/
--- End Message ---
--- Begin Message ---
>
>
> I want to thank you, Daniel, for this help. - I was looking for an
> "isarray" type function
There is no such function or facility in php. However you can check date in
string by DateTime object also
try {
$date = new DateTime('2000-01-01');
} catch (Exception $e) {
echo $e->getMessage();
exit(1);
}
Check php.net/datetime.construct
--
Shiplu.Mokadd.im
ImgSign.com | A dynamic signature machine
Innovation distinguishes between follower and leader
--- End Message ---
--- Begin Message ---
Or you could use a regular expression:
$probe = '2000-01-01';
$found = preg_match('/(19|20)\d\d[- \.](0[1-9]|1[012])[-
\.](0[1-9]|[12][0-9]|3[01])/', $probe);
var_dump($found==1);
Erwin
2012/7/3 shiplu <shiplu....@gmail.com>
> >
> >
> > I want to thank you, Daniel, for this help. - I was looking for an
> > "isarray" type function
>
>
> There is no such function or facility in php. However you can check date in
> string by DateTime object also
>
> try {
> $date = new DateTime('2000-01-01');
> } catch (Exception $e) {
> echo $e->getMessage();
> exit(1);
> }
>
> Check php.net/datetime.construct
>
> --
> Shiplu.Mokadd.im
> ImgSign.com | A dynamic signature machine
> Innovation distinguishes between follower and leader
>
--- End Message ---
--- Begin Message ---
Hello Experts,
I have putty.exe on my desktop so if I will go to command prompt and then
to C:\Documents and Settings\user\Desktop location and execute following
command it will launch the Putty window of telnet connection to server
specified:
putty.exe telnet://10.3.215.15/
I am trying to launch the putty to telnet to specific server using
following but its not working for me:
<?php
$securecrt = "C:\\Documents and Settings\\user\\Desktop\\putty.exe telnet://
10.3.215.15/ ";
exec($securecrt);
?>
If I try following then it launches the putty application but will have to
provide the host name or IP to login:
<?php
$securecrt = "C:\\Documents and Settings\\user\\Desktop\\putty.exe ";
exec($securecrt);
?>
Not sure if I am missing something very basic, It will be great if someone
can help with this.
Thanks,
Devang
--- End Message ---
