php-general Digest 14 Nov 2011 18:56:23 -0000 Issue 7567
php-general Digest 14 Nov 2011 18:56:23 - Issue 7567
Topics (messages 315671 through 315678):
Re: speeding up heavy web apps with a php-js cache manager
315671 by: Ashley Sheridan
Re: Novice MySQL problem
315672 by: David Robley
315673 by: Jim Giner
315674 by: David Robley
315675 by: Stuart Dallas
Re: problem with sending AT command in php
315676 by: Richard Quadling
Sniping on the List
315677 by: George Langley
315678 by: Fredric L. Rice
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 Sun, 2011-11-13 at 22:27 -0500, Plamen Ivanov wrote:
On 11/13/2011 01:39 PM, Ashley Sheridan wrote:
On Sun, 2011-11-13 at 18:39 +0100, rene7705 wrote:
Hi.
I'm developing a CMS, with lots of javascript code.
I haven't been satisfied with my page initialization speeds, so I've
started on a caching system.
First, i used to call up javascript as needed, and just-in-time. But that,
on a localhost setup, results in a second and a half delay.
So now I include all javascript for the entire CMS as inline js in the
head of index.php. Index.php gets gzipped of course.
The difference is really noticeable, without looking at any counters even.
So far so good.
Now I'd like to implement a caching system for ajax requests.
I was thinking to take URL, GET, and POST send parameters, and compare
such
a set to items in a local js cache.
If the local cache is not available, the ajax request is sent as normal,
and the result is put in the cache.
Javascript implementation could be as easy as changing
jQuery.ajax(ajaxCommand) to cacheManager.ajax(ajaxCommand)
If the local cache is available, the onSuccess handler of the ajax request
is called with the cached data.
On the server end, the cached items are put in a global JSON FAT file,
again with URL, GET and POST as keys to a flat plaintext filename.
On the server, any normal ajaxable URL will call php code to update the
server end cache.
Index.php would query the cache for a subscription, a list of cache
URL+GET+POST keys, and include these cached items as
div id=cache_idx style=display:none!-- {keys :
{URL+GET+POST+LAST_MODIFIED}, data : cached-data} --/div
From where the javascript cache manager would be able to find the data.
The javascript cache manager would include some kind of polling system, to
get near realtime updates for it's cached data.
I'm convinced caching of ajax results would further increase my page
initialization speeds.
I'm interested to learn about potential pitfalls, any opensource libraries
that already do this, or any other tips you can think of.
Thanks for your time.
You shouldn't really cache POST requests. GET data is only ever meant to
fetch data from a server, which works well with caching, but POST is
meant to change the state of something on the server, so it may never
make sense to cache that, and could cause problems later on with things
being cached even if they appear as if they shouldn't.
If there are certain chunks of the content that will never change then
you could cache those I guess, although not sure how you would be able
to do that at the server level.
Another way to add some speed is to minify your Javascript, be it inline
or in a different file, which results in less bandwidth being used to
send the data, and less time to send it as it's smaller. Images can be
combined into a sprite map which can reduce the requests in the same way
you reduced them by making your Javascript inline.
If you use libraries like JQuery, use a public one such as that found on
Google Code. Many sites use it, so it is more likely a user has it
cached on their machine already from visiting another site that uses it.
These are all pretty basic techniques, and although they don't answer
your question exactly, they may be useful for you to achieve the same
goal.
What exactly do you mean by i used to call up javascript as needed,
and just-in-time.? If you have a lot of dependencies having lag makes
sense because of the cascade of calls. Bundle up all your static
scripts in one JS file and compress. It should get cached most modern
browsers. Anyhoo, I don't really know how caching works, but this
might help: HTTP ETag.
As a side note: don't do inline -
http://robertnyman.com/2008/11/20/why-inline-css-and-javascript-code-is-such-a-bad-thing/
Please try to remember to keep the list copied into the replies so that
everyone can benefit.
--
[PHP] Re: Novice MySQL problem
Jim Giner wrote: drive view drivev...@gmail.com wrote in message news:cam4sn2ip7yncw2-2soq-vjk8suer7u5x96fvpeqoitkkcaj...@mail.gmail.com... Hi, I'm a novice to MySQL and am currently facing the following difficulty. I'm trying to update a table with a row of data the primary key of which is an ID which I believe is an auto incrementing serial number. My first question is how to check if this is the case. If you are updating a row, you should already know the id of the record, so in your update statement you reference it in the where clause. (ie, where rec_id = $curr_rec_key) Secondly while trying to insert such a row leaving out this column mySql is inserting the row at ID 0 (the previous ID's in the table are from 1 to 9), but then will not take further inserts. Thanks for any help available. Regards Toni I don't know what the problem here is. Personally I never use auto-inc fields. That statement tells us you have a poor understanding of the concept of relational databases, or you don't use relational tables. Cheers -- David Robley Sure, it's clean laundry. The cat's sitting on it, isn't he? Today is Pungenday, the 26th day of The Aftermath in the YOLD 3177. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: Novice MySQL problem
Actually, no it doesn't, since I have a well-developed sense of all of that, but that's not helping to answer the OP's question now, is it? Stay on point. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: Novice MySQL problem
Jim Giner wrote: Actually, no it doesn't, since I have a well-developed sense of all of that, but that's not helping to answer the OP's question now, is it? Stay on point. Probably it helps the OP about as much as your statement that 'I don't know what the problem here is. Personally I never use auto-inc fields.' Cheers -- David Robley Useless Invention: Kickstand for a tank. Today is Pungenday, the 26th day of The Aftermath in the YOLD 3177. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Novice MySQL problem
On 14 Nov 2011, at 11:47, Jim Giner wrote: Actually, no it doesn't, since I have a well-developed sense of all of that, but that's not helping to answer the OP's question now, is it? Stay on point. The OP's problem is solved, so the point is no longer relevant. I'm curious to know what your well-developed sense of all of that does when in lieu of auto-incrementing fields, and why. The only legitimate reason I've ever come across to avoid them is when you expect to need to partition data across multiple master DB servers. Is this why you avoid them? -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] problem with sending AT command in php
On 12 November 2011 20:02, a dehqan dehqa...@gmail.com wrote: dio_write($handle, 'AT') dio_write($handle, AT) make firefox times out on Waiting for localhost ... . But dio_write($handle, AT\n) makes it prints AT exactly the same command or A A , .. On Sat, Nov 12, 2011 at 10:02 PM, Negin Nickparsa nickpa...@gmail.comwrote: are you sure about ATD03518726535\n? can you try if ( dio_write($handle, 'AT') )? Don't use \n, use \r. http://en.wikipedia.org/wiki/AT_commands#Example_session -- Richard Quadling Twitter : EE : Zend : PHPDoc : Fantasy Shopper @RQuadling : e-e.com/M_248814.html : bit.ly/9O8vFY : bit.ly/lFnVea : fan.sh/6/370 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Sniping on the List
Am concerned over the number of posts that appear to be from people trying to over-inflate their self-importance. If you are the world's best coder, then help those of us who aren't. If you happen to know a better way to do something that I'm struggling with, then please share it. But if you just want to take pot shots at us, then please keep your comments to yourself. To that end, I wish to thank Ashley Sheridan, Daniel P. Brown, Tedd Sperling and Tommy Pham, to name but just a few of those who have submitted incredibly-helpful posts, that I have kept for reference. Your contributions are very much appreciated - thanks. George Langley Interactive Developer www.georgelangley.ca
Re: [PHP] Sniping on the List
If you are the world's best coder That would be me. :) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Problems with proc_open and getmypid
Hello, I'm developing a PHP application that runs on GNU/Linux with php cli. A process must launch another one and store its pid, so I use proc_open and then proc_status to achieve that. The child process must also get its own pid and write it down to a file. After that, the calling process should compare both pids and they should match, but in fact they shoudln't. The problem is that when calling to proc_open like: $res = proc_open (/usr/bin/php proc2.php, array(), $pipes); Two processes are created, one for the sh shell that launchs the php interpreter, and another for the php interpreter itself. Also, it seems like proc_get_status($res) returns the status of the sh, while getmypid in the second process returns the pid of the php interpreter. I wonder if there's anyway of do something of these: a) Get the pid of the php interpreter on proc_open instead of the sh one on the parent process, or... b) Get the pid of the sh process instead of the php interpreter on the child process. Or any manner in which two pids matches. Thanks a lot in advance, -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Novice MySQL problem
On Mon, Nov 14, 2011 at 4:11 AM, Stuart Dallas stu...@3ft9.com wrote: On 14 Nov 2011, at 11:47, Jim Giner wrote: Actually, no it doesn't, since I have a well-developed sense of all of that, but that's not helping to answer the OP's question now, is it? Stay on point. The OP's problem is solved, so the point is no longer relevant. I'm curious to know what your well-developed sense of all of that does when in lieu of auto-incrementing fields, and why. The only legitimate reason I've ever come across to avoid them is when you expect to need to partition data across multiple master DB servers. Is this why you avoid them? -Stuart -- Stuart Dallas 3ft9 Ltd http://3ft9.com/ Even with clustering, not comparing inherent clustering technique between RDBMSes, consider the following (MySQL) table example: CREATE TABLE `my_cluster_sample` ( `pkID1_AutoInc` bigint(11) NOT NULL AUTO_INCREMENT, `pkID2_SrvrID` int(11) NOT NULL DEFAULT '1' COMMENT 'Use # of designated server ID', `name` varchar(50) NOT NULL, PRIMARY KEY (`pkID1_AutoInc`,`pkID2_SrvrID`) ) The only reason that I see where not to use integer types with auto increment for PK is when you have an insane _LARGE_ number of rows, in any given DB instance/server. Then, the integer type no longer applies and the use of GUID/UUID or other surrogate types comes in, aside from getting into hot debate/discussion about pros cons of natural vs surrogate keys even if you don't have large amount of data ;) Regards, Tommy -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
