php-general Digest 11 Mar 2012 23:11:18 -0000 Issue 7723
php-general Digest 11 Mar 2012 23:11:18 - Issue 7723
Topics (messages 316981 through 316988):
Re: questions about $_SERVER
316981 by: Stuart Dallas
316982 by: Daniel Brown
316984 by: Tedd Sperling
316986 by: Tim Streater
Re: Have little enough hair as it is ...
316983 by: Lester Caine
316988 by: Simon Schick
Re: Function mktime() documentation question
316985 by: Tedd Sperling
316987 by: Matijn Woudt
Administrivia:
To subscribe to the digest, e-mail:
php-general-digest-subscr...@lists.php.net
To unsubscribe from the digest, e-mail:
php-general-digest-unsubscr...@lists.php.net
To post to the list, e-mail:
php-gene...@lists.php.net
--
---BeginMessage---
On 11 Mar 2012, at 01:43, Tedd Sperling wrote:
On Mar 10, 2012, at 3:53 PM, tamouse mailing lists wrote:
On Sat, Mar 10, 2012 at 9:37 AM, Tedd Sperling tedd.sperl...@gmail.com
wrote:
That's correct, but to access those variables outside of their scope (such
as a function) you do via a SuperGlobal, namely $GLOBAL['whatever'].
As such, there are no globals in PHP other than SuperGlobals. As I said,
if I'm wrong, please show me otherwise.
I guess I don't know what you mean by globals. I know what globals
are, but not globals.
I don't understand your question. I know what questions are, but not your
question. :-)
I think the confusion is arising because the word superglobal is used in PHP
when referring to globals, because the word global has been incorrectly applied
for quite some time.
A global variable is a variable that is accessible in every scope, so Tedd is
right… the only true globals in PHP are the superglobals. Here's an overview of
the various scopes in PHP (I've probably missed some, but it's enough to make
the point)…
?php
// Only visible when not in a function or class. The PHP manual calls
// this the global scope: http://php.net/variables.scope
$var1 = 'a';
function funcB()
{
// Only visible inside this function.
$var2 = 'b';
}
function funcB()
{
// This statement makes the variable from the top-level scope visible
// within this function. Essentially this is the same as passing the
// variable in to the function by reference.
global $var1;
}
class classC
{
// Visible to methods in this class only.
private $var3 = 'c';
// Visible to methods in this class and methods in derived classes.
protected $var4 = 'd';
// Method visible in this class only.
private methodA()
{
// Visible only inside this method.
$var5 = 'e';
}
// Method visible in this class and methods in derived classes.
protected methodB()
{
// See funcB()
global $var1;
}
// Method visible on any instance of this class.
public methodC()
{
// See funcB()
global $var1;
}
}
?
The global keyword allows you to expose a variable that has been defined at the
top-level scope ($var1 in the above example) in the current scope. It does NOT
create a global variable; the keyword is not an accurate reflection of what it
does.
My guess is that calling the top-level scope global made sense when functions
were the only other level of scope that existed. Now that we have yet more
levels of scope it can be a bit confusing.
I hope this helps clear things up.
-Stuart
--
Stuart Dallas
3ft9 Ltd
http://3ft9.com/---End Message---
---BeginMessage---
On Sat, Mar 10, 2012 at 10:37, Tedd Sperling tedd.sperl...@gmail.com wrote:
As such, there are no globals in PHP other than SuperGlobals. As I said, if
I'm wrong, please show me otherwise.
A superglobal is predefined at run-time by the parser,
environment, SAPI, etc. (_SERVER, _POST, _GET, _REQUEST, _ENV,
_SESSION, _COOKIE), whereas a global can be defined at any time, and
is available to the current instance. All superglobals are globals,
but not all globals are superglobals.
--
/Daniel P. Brown
Network Infrastructure Manager
http://www.php.net/
---End Message---
---BeginMessage---
On Mar 11, 2012, at 10:25 AM, Daniel Brown wrote:
On Sat, Mar 10, 2012 at 10:37, Tedd Sperling tedd.sperl...@gmail.com wrote:
As such, there are no globals in PHP other than SuperGlobals. As I said,
if I'm wrong, please show me otherwise.
A superglobal is predefined at run-time by the parser,
environment, SAPI, etc. (_SERVER, _POST, _GET, _REQUEST, _ENV,
_SESSION, _COOKIE), whereas a global can be defined at any time, and
is available to the current instance. All superglobals are globals,
but not all globals are superglobals.
--
/Daniel P. Brown
Network Infrastructure Manager
http://www.php.net/
Now I'm confused.
My understanding is that all variables defined within the main script are
accessible within the main script because they are all within scope by
definition.
Additionally, main
Re: [PHP] Function mktime() documentation question
On Sat, 2012-03-10 at 20:38 -0500, Tedd Sperling wrote:
On Mar 10, 2012, at 12:20 PM, Maciek Sokolewicz wrote:
function getAmountOfDaysInAMonth($month, $year) {
$days = array(31, (($year%4==0 and ($year%100 0 or $year%400==0)) ? 29
: 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
return $days[$month+1];
}
I like that -- here's a small variation.
function numberDaysMonth($month, $year)
{
// Leap year is definded as a year that is evenly divisible by four
// AND (year NOT evenly divisible by 100 OR year IS evenly divisible by
400)
$feb = ($year%4 == 0 ($year%100 != 0 || $year%400 == 0) ) ? 29 : 28;
$days = array(0, 31, $feb, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
return $days[$month];
}
Cheers,
tedd
_
tedd.sperl...@gmail.com
http://sperling.com
I still don't see what's wrong with
date(t);
--
Thanks,
Ash
http://www.ashleysheridan.co.uk
Re: [PHP] questions about $_SERVER
On 11 Mar 2012, at 01:43, Tedd Sperling wrote:
On Mar 10, 2012, at 3:53 PM, tamouse mailing lists wrote:
On Sat, Mar 10, 2012 at 9:37 AM, Tedd Sperling tedd.sperl...@gmail.com
wrote:
That's correct, but to access those variables outside of their scope (such
as a function) you do via a SuperGlobal, namely $GLOBAL['whatever'].
As such, there are no globals in PHP other than SuperGlobals. As I said,
if I'm wrong, please show me otherwise.
I guess I don't know what you mean by globals. I know what globals
are, but not globals.
I don't understand your question. I know what questions are, but not your
question. :-)
I think the confusion is arising because the word superglobal is used in PHP
when referring to globals, because the word global has been incorrectly applied
for quite some time.
A global variable is a variable that is accessible in every scope, so Tedd is
right… the only true globals in PHP are the superglobals. Here's an overview of
the various scopes in PHP (I've probably missed some, but it's enough to make
the point)…
?php
// Only visible when not in a function or class. The PHP manual calls
// this the global scope: http://php.net/variables.scope
$var1 = 'a';
function funcB()
{
// Only visible inside this function.
$var2 = 'b';
}
function funcB()
{
// This statement makes the variable from the top-level scope visible
// within this function. Essentially this is the same as passing the
// variable in to the function by reference.
global $var1;
}
class classC
{
// Visible to methods in this class only.
private $var3 = 'c';
// Visible to methods in this class and methods in derived classes.
protected $var4 = 'd';
// Method visible in this class only.
private methodA()
{
// Visible only inside this method.
$var5 = 'e';
}
// Method visible in this class and methods in derived classes.
protected methodB()
{
// See funcB()
global $var1;
}
// Method visible on any instance of this class.
public methodC()
{
// See funcB()
global $var1;
}
}
?
The global keyword allows you to expose a variable that has been defined at the
top-level scope ($var1 in the above example) in the current scope. It does NOT
create a global variable; the keyword is not an accurate reflection of what it
does.
My guess is that calling the top-level scope global made sense when functions
were the only other level of scope that existed. Now that we have yet more
levels of scope it can be a bit confusing.
I hope this helps clear things up.
-Stuart
--
Stuart Dallas
3ft9 Ltd
http://3ft9.com/
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] questions about $_SERVER
On Sat, Mar 10, 2012 at 10:37, Tedd Sperling tedd.sperl...@gmail.com wrote: As such, there are no globals in PHP other than SuperGlobals. As I said, if I'm wrong, please show me otherwise. A superglobal is predefined at run-time by the parser, environment, SAPI, etc. (_SERVER, _POST, _GET, _REQUEST, _ENV, _SESSION, _COOKIE), whereas a global can be defined at any time, and is available to the current instance. All superglobals are globals, but not all globals are superglobals. -- /Daniel P. Brown Network Infrastructure Manager http://www.php.net/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Have little enough hair as it is ...
( Been down London over night ;) ) ... and was not awake enough to change email address ... http://piwik.medw.org.uk/phpinfo.php has http://piwik.medw.org.uk/ working fine... http://piwik.rainbowdigitalmedia.org.uk/phpinfo.php is just giving seg faults on http://piwik.rainbowdigitalmedia.org.uk/ but http://rainbowdigitalmedia.org.uk/ is working perfectly. The piwik analytics is based on Zend, and I've not been able to get it working on either of the two new machines, while all of my other stuff is working fine. I started with Apache2.4.1 and PHP5.4.0 and moved back to what should be the same versions as the working machines but without success. Simon Schick wrote: Can you give us some more information? I've been working on this for some days and tried various combinations of Apache and PHP, but my starting point was Ap2.4.1 with PHP5.4.0 and I've now worked my way back through versions to what should be the same as setup as is working on piwik.medw.org.uk but I have yet to get piwik to run on either new machine! How is php called in your apache-configuration? (f)cgi, module or somehow else? You said that the configuration should be the same ... can you double-check that? Reload the services etc ... Always used module and I see no reason to change I've enabled and disable just about everything, and the installer tells me the set-up is fine. What about the logs? There must be more info in there ... THAT is what is pissing me off. ZEND does not seem to log anything usable and I have yet to establish the best way of debugging it. The rest of my stuff simply worked, gave the expected new nagging and allowed me to track and tidy them. EVERY configuration of ZEND based piwik just gives ... [notice] child pid 10345 exit signal Segmentation fault (11) With eaccelerator switched on and tracking, I can see files being cached, but have yet to work out what the next file would be, and to be honest, I'm not convinced it runs the same way every time, but that is probably just the order of parallel paths being run? -- Lester Caine - G8HFL - Contact - http://lsces.co.uk/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk// Firebird - http://www.firebirdsql.org/index.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] questions about $_SERVER
On Mar 11, 2012, at 10:25 AM, Daniel Brown wrote: On Sat, Mar 10, 2012 at 10:37, Tedd Sperling tedd.sperl...@gmail.com wrote: As such, there are no globals in PHP other than SuperGlobals. As I said, if I'm wrong, please show me otherwise. A superglobal is predefined at run-time by the parser, environment, SAPI, etc. (_SERVER, _POST, _GET, _REQUEST, _ENV, _SESSION, _COOKIE), whereas a global can be defined at any time, and is available to the current instance. All superglobals are globals, but not all globals are superglobals. -- /Daniel P. Brown Network Infrastructure Manager http://www.php.net/ Now I'm confused. My understanding is that all variables defined within the main script are accessible within the main script because they are all within scope by definition. Additionally, main script variables are not accessible out of scope (such as in a function) unless one uses $GLOBALS to retrieve those values. That is the limit of my understanding of $GLOBALS. As to placing an additional requirement (i.e., being predefined) on the definition as to what constitutes a SuperGlobal is outside my understanding. As such, I must defer to the PHP Manual, namely: http://php.net/manual/en/language.variables.superglobals.php This document clearly states that $GLOBALS is a SuperGlobal -- what am I not understanding here? Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Mar 11, 2012, at 6:12 AM, Ashley Sheridan wrote:
I still don't see what's wrong with
date(t);
--
Thanks,
Ash
Ash:
It's just too damn simple -- we need to make things complicated. :-)
Actually, this works for me:
$days_in_month = date('t', mktime(0, 0, 0, $next_month, 0, $year));
But again, I don't see why I have to use next month to find the number of
days in this month.
O', the mysteries of life.
Cheers,
tedd
_
tedd.sperl...@gmail.com
http://sperling.com
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] questions about $_SERVER
On 11 Mar 2012 at 18:16, Tedd Sperling tedd.sperl...@gmail.com wrote:
On Mar 11, 2012, at 10:25 AM, Daniel Brown wrote:
On Sat, Mar 10, 2012 at 10:37, Tedd Sperling tedd.sperl...@gmail.com wrote:
As such, there are no globals in PHP other than SuperGlobals. As I said,
if I'm wrong, please show me otherwise.
A superglobal is predefined at run-time by the parser,
environment, SAPI, etc. (_SERVER, _POST, _GET, _REQUEST, _ENV,
_SESSION, _COOKIE), whereas a global can be defined at any time, and
is available to the current instance. All superglobals are globals,
but not all globals are superglobals.
Now I'm confused.
My understanding is that all variables defined within the main script are
accessible within the main script because they are all within scope by
definition.
Additionally, main script variables are not accessible out of scope (such as
in a function) unless one uses $GLOBALS to retrieve those values.
In the following, $x is a global but not a super-global (AFAIK).
?php
function echox ()
{
global $x;
echo $x;
}
$x = Hello world\n;
echox ();
?
--
Cheers -- Tim
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Sun, Mar 11, 2012 at 7:33 PM, Tedd Sperling tedd.sperl...@gmail.com wrote:
On Mar 11, 2012, at 6:12 AM, Ashley Sheridan wrote:
I still don't see what's wrong with
date(t);
--
Thanks,
Ash
Ash:
It's just too damn simple -- we need to make things complicated. :-)
Actually, this works for me:
$days_in_month = date('t', mktime(0, 0, 0, $next_month, 0, $year));
But again, I don't see why I have to use next month to find the number of
days in this month.
That's because you're requesting day 0 of some month, which refers to
the last day in the previous month.
Try: $days_in_month = date('t', mktime(0, 0, 0, $next_month, 1, $year));
- Matijn
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Have little enough hair as it is ...
2012/3/11 Lester Caine les...@lsces.co.uk: ( Been down London over night ;) ) ... and was not awake enough to change email address ... http://piwik.medw.org.uk/phpinfo.php has http://piwik.medw.org.uk/ working fine... http://piwik.rainbowdigitalmedia.org.uk/phpinfo.php is just giving seg faults on http://piwik.rainbowdigitalmedia.org.uk/ but http://rainbowdigitalmedia.org.uk/ is working perfectly. The piwik analytics is based on Zend, and I've not been able to get it working on either of the two new machines, while all of my other stuff is working fine. I started with Apache2.4.1 and PHP5.4.0 and moved back to what should be the same versions as the working machines but without success. Simon Schick wrote: Can you give us some more information? I've been working on this for some days and tried various combinations of Apache and PHP, but my starting point was Ap2.4.1 with PHP5.4.0 and I've now worked my way back through versions to what should be the same as setup as is working on piwik.medw.org.uk but I have yet to get piwik to run on either new machine! How is php called in your apache-configuration? (f)cgi, module or somehow else? You said that the configuration should be the same ... can you double-check that? Reload the services etc ... Always used module and I see no reason to change I've enabled and disable just about everything, and the installer tells me the set-up is fine. What about the logs? There must be more info in there ... THAT is what is pissing me off. ZEND does not seem to log anything usable and I have yet to establish the best way of debugging it. The rest of my stuff simply worked, gave the expected new nagging and allowed me to track and tidy them. EVERY configuration of ZEND based piwik just gives ... [notice] child pid 10345 exit signal Segmentation fault (11) With eaccelerator switched on and tracking, I can see files being cached, but have yet to work out what the next file would be, and to be honest, I'm not convinced it runs the same way every time, but that is probably just the order of parallel paths being run? -- Lester Caine - G8HFL - Contact - http://lsces.co.uk/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk// Firebird - http://www.firebirdsql.org/index.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php Hi, Lester You're talking about some kind of installer ... What exactly is it? And what exactly do you mean with ZEND does not seem to log ...? Apache, PHP or something that's controlling both? And the more interesting question as you're only talking about ZEND ... in which log-file have you found the notice? I guess it's the log-file of Apache ... I guess you have already tried to set Apache and PHP to the lowest possible error-level ... I searched up the inet and came across totally different solutions ... Things that I found you can try: * Replace the index.php ... Some people reported that this error was caused by an endless-loop in their php-script * Disable all php-modules that are not really needed (f.e. APC or eAccelerator) * Disable all superfluous apache-modules (you should have done that anyways, but let's try to put it to a minimum) Here's also one tutorial how to get more information out of the apache-process. Haven't tried that and can therefore just give the hint to test it once. http://stackoverflow.com/questions/7745578/notice-child-pid-3580-exit-signal-segmentation-fault-11-in-apache-error-l Hope you can get some more details ... Bye Simon -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Have little enough hair as it is ...
On Mon, Mar 12, 2012 at 12:11 AM, Simon Schick simonsimc...@googlemail.com wrote: 2012/3/11 Lester Caine les...@lsces.co.uk: ( Been down London over night ;) ) ... and was not awake enough to change email address ... http://piwik.medw.org.uk/phpinfo.php has http://piwik.medw.org.uk/ working fine... http://piwik.rainbowdigitalmedia.org.uk/phpinfo.php is just giving seg faults on http://piwik.rainbowdigitalmedia.org.uk/ but http://rainbowdigitalmedia.org.uk/ is working perfectly. The piwik analytics is based on Zend, and I've not been able to get it working on either of the two new machines, while all of my other stuff is working fine. I started with Apache2.4.1 and PHP5.4.0 and moved back to what should be the same versions as the working machines but without success. Simon Schick wrote: Can you give us some more information? I've been working on this for some days and tried various combinations of Apache and PHP, but my starting point was Ap2.4.1 with PHP5.4.0 and I've now worked my way back through versions to what should be the same as setup as is working on piwik.medw.org.uk but I have yet to get piwik to run on either new machine! How is php called in your apache-configuration? (f)cgi, module or somehow else? You said that the configuration should be the same ... can you double-check that? Reload the services etc ... Always used module and I see no reason to change I've enabled and disable just about everything, and the installer tells me the set-up is fine. What about the logs? There must be more info in there ... THAT is what is pissing me off. ZEND does not seem to log anything usable and I have yet to establish the best way of debugging it. The rest of my stuff simply worked, gave the expected new nagging and allowed me to track and tidy them. EVERY configuration of ZEND based piwik just gives ... [notice] child pid 10345 exit signal Segmentation fault (11) With eaccelerator switched on and tracking, I can see files being cached, but have yet to work out what the next file would be, and to be honest, I'm not convinced it runs the same way every time, but that is probably just the order of parallel paths being run? -- Lester Caine - G8HFL - Contact - http://lsces.co.uk/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk// Firebird - http://www.firebirdsql.org/index.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php Hi, Lester You're talking about some kind of installer ... What exactly is it? And what exactly do you mean with ZEND does not seem to log ...? Apache, PHP or something that's controlling both? And the more interesting question as you're only talking about ZEND ... in which log-file have you found the notice? I guess it's the log-file of Apache ... I guess you have already tried to set Apache and PHP to the lowest possible error-level ... I searched up the inet and came across totally different solutions ... Things that I found you can try: * Replace the index.php ... Some people reported that this error was caused by an endless-loop in their php-script I have experienced a segfault once with mod_rewrite and some endless loop in a .htaccess file. So you might want to check that too. - Matijn -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Have little enough hair as it is ...
Matijn Woudt wrote:
Things that I found you can try:
* Replace the index.php ... Some people reported that this error was
caused by an endless-loop in their php-script
I have experienced a segfault once with mod_rewrite and some endless
loop in a .htaccess file. So you might want to check that too.
Thanks for the hints guys, but it was the wrong direction ...
piwik is an analytics package ... google analytics with steroids ;)
But the code base is a bit difficult to work with when one does not use
frameworks like Zend.
The starting point was a segfault in PHP which needs to be fixed, but we
normally manage to avoid hitting it by managing things better. The updates I'd
added to the Firebird driver in Zend were missing some checks which kicked it
out at which point ... NOTHING gets logged.
In 12 years I've managed to avoid having to install xdebug as we have all the
debug tools I need in the bitweaver framework. I've grabbed a nightly build from
Derick which I needed to work on PHP5.4 and managed to dump the traces to nail
down where the problem arose. I'm not sure why there is a difference between the
working machines and the problem ones, but the fixes have now allowed me to get
the code running, so I can then finish debugging 'in-line' which I'm used to.
Next step is to move back to Apache 2.4.1 since I'm still on 2.2 but at least
now I do have the tools if the problem returns then.
More irritating is
'Notice: Array to string conversion' which are coming up all over the place. I
can understand what the problem is ... but trying to remove the notices is more
challenging ...
$secondsGap[] = array($gap[0] * 60, $gap[1] * 60);
if( isset($secondsGap[1]) ) {
$gapName = $secondsGap[0].to.$secondsGap[1];
} else {
$gapName = $secondsGap[0];
}
$secondsGap[] is two numbers, which are used to create the name string, so what
is the 'official' way of making this work without generating warnings?
--
Lester Caine - G8HFL
-
Contact - http://lsces.co.uk/wiki/?page=contact
L.S.Caine Electronic Services - http://lsces.co.uk
EnquirySolve - http://enquirysolve.com/
Model Engineers Digital Workshop - http://medw.co.uk//
Firebird - http://www.firebirdsql.org/index.php
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
