Re: [PHP] Better way to store data in memory?
Perhaps, you can use Zend Cache which comes with Zend Framework to store your data, without sharing them, allowing to store them in files or memory (shared or not) in an easy way...I'm intersting on Zend cache for its roadmap and because its a Zend product, like php...best quality and best support. I'm using it to cache various php objects, build the first time from database query...later from cache...really good... - Original Message - From: Richard Davey [EMAIL PROTECTED] To: php-general@lists.php.net Sent: Monday, July 23, 2007 6:50 PM Subject: [PHP] Better way to store data in memory? Hi php-general collective, I'm building up some image data in my PHP script (ready for output to the browser). Having to do some complex per pixel manipulation, which is fine - but I'm just wondering is there a quicker / more efficient way of storing the pixel data than in an array? At the moment I hold it in $array[$x][$y], which makes the drawing loop painless, but it's creating an array with 307,200 elements which is proving to be quite slow. As I'm only storing fixed width byte values is there an alternative method? For example the ability to read/write to a chunk of memory instead? (so I can read out whole strips of data rather than one by one?) I was looking at the Shared Memory functions, but that isn't exactly what I need (I don't want it shared, I want it process specific) Cheers, Rich -- Zend Certified Engineer http://www.corephp.co.uk Never trust a computer you can't throw out of a window -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] regular expression and forbidden words
Hi, i'm french, i'm using regular expressions in php in order to rewrite hyperlink tags in a specific way before apache output is beeing sent to client. Purpose is to replace href attribute of any A html tag by a javascript function calling an ajax loader. Currently I have wrote that: $pattern = '/a href=(http:\/\/dev.netdoor.fr|(\.))\/index.php\?page=(.*?)(.*?)\\/a/i'; $replacement = 'a href=javascript:void(0); OnClick=javascript:yui_fastLoader(\'./systeme/chargeur.php?page=$4\');$5/a'; $html_mark = preg_replace($pattern, $replacement, $html_mark); it works, but it's too permissive, it replaces too much links (some links with some get parameters must stay unchanged) I don't really understand my pattern...it's a little strange for me...lol I wouldn't like to rewrite links that contains any of the following words in get parameters (query string): noLoader noLeftCol skipallbutpage skipservice i would like to rewrite only link that begin with 'http://dev.netdoor.fr' or '.' examples: a href=http://dev.netdoor.fr/index.php?page=./comptes/index.phpnoLoadernoLeftColidx=6bdx=423skipservice;test/a =must be not rewritted! a class=myclass href=./index.php?page=./comptes/mediatheque/index.phpfilter=mov;flv;mpegidx=7name/a =must be rewritted like this : a class=myclass href=javascript:void(0); OnClick=javascript:yui_fastLoader(\'./systeme/chargeur.php?page=./comptes/mediatheque/index.phpfilter=mov;flv;mpegidx=7\');name/a Please help me...:0) best regards nicolas
[PHP] regular expression and forbidden words
Hi, i'm french, i'm using regular expressions in php in order to rewrite hyperlink tags in a specific way before apache output is beeing sent to client. Purpose is to replace href attribute of any A html tag by a javascript function calling an ajax loader. Currently I have wrote that: $pattern = '/a href=(http:\/\/dev.netdoor.fr|(\.))\/index.php\?page=(.*?)(.*?)\\/a/i'; $replacement = 'a href=javascript:void(0); OnClick=javascript:yui_fastLoader(\'./systeme/chargeur.php?page=$4\');$5/a'; $html_mark = preg_replace($pattern, $replacement, $html_mark); it works, but it's too permissive, it replaces too much links (some links with some get parameters must stay unchanged) I don't really understand my pattern...it's a little strange for me...lol I wouldn't like to rewrite links that contains any of the following words in get parameters (query string): noLoader noLeftCol skipallbutpage skipservice i would like to rewrite only link that begin with 'http://dev.netdoor.fr' or '.' examples: a href=http://dev.netdoor.fr/index.php?page=./comptes/index.phpnoLoadernoLeftColidx=6bdx=423skipservice;test/a =must be not rewritted! a class=myclass href=./index.php?page=./comptes/mediatheque/index.phpfilter=mov;flv;mpegidx=7name/a =must be rewritted like this : a class=myclass href=javascript:void(0); OnClick=javascript:yui_fastLoader(\'./systeme/chargeur.php?page=./comptes/mediatheque/index.phpfilter=mov;flv;mpegidx=7\');name/a Please help me...:0) best regards nicolas -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] rewrite hyperlink tags with a regular expression containing forbidden words
Hi, i'm french, i'm using regular expressions in php in order to rewrite hyperlink tags in a specific way before apache output is beeing sent to client. Purpose is to replace href attribute of any A html tag by a javascript function calling an ajax loader. Currently I have wrote that: $pattern = '/a href=(http:\/\/dev.netdoor.fr|(\.))\/index.php\?page=(.*?)(.*?)\\/a/i'; $replacement = 'a href=javascript:void(0); OnClick=javascript:yui_fastLoader(\'./systeme/chargeur.php?page=$4\');$5/a'; $html_mark = preg_replace($pattern, $replacement, $html_mark); it works, but it's too permissive, it replaces too much links (some links with some get parameters must stay unchanged) I don't really understand my pattern...it's a little strange for me...lol I wouldn't like to rewrite links that contains any of the following words in get parameters (query string): noLoader noLeftCol skipallbutpage skipservice i would like to rewrite only link that begin with 'http://dev.netdoor.fr' or '.' examples: a href=http://dev.netdoor.fr/index.php?page=./comptes/index.phpnoLoadernoLeftColidx=6bdx=423skipservice;test/a =must be not rewritted! a class=myclass href=./index.php?page=./comptes/mediatheque/index.phpfilter=mov;flv;mpegidx=7name/a =must be rewritted like this : a class=myclass href=javascript:void(0); OnClick=javascript:yui_fastLoader(\'./systeme/chargeur.php?page=./comptes/mediatheque/index.phpfilter=mov;flv;mpegidx=7\');name/a Please help me...:0) best regards nicolas
[PHP] regular expression and forbidden words
Hi, i'm french, i'm using regular expressions in php in order to rewrite hyperlink tags in a specific way before apache output is beeing sent to client. Purpose is to replace href attribute of any A html tag by a javascript function calling an ajax loader. Currently I have wrote that: $pattern = '/a href=(http:\/\/dev.netdoor.fr|(\.))\/index.php\?page=(.*?)(.*?)\\/a/i'; $replacement = 'a href=javascript:void(0); OnClick=javascript:yui_fastLoader(\'./systeme/chargeur.php?page=$4\');$5/a'; $html_mark = preg_replace($pattern, $replacement, $html_mark); it works, but it's too permissive, it replaces too much links (some links with some get parameters must stay unchanged) I don't really understand my pattern...it's a little strange for me...lol I wouldn't like to rewrite links that contains any of the following words in get parameters (query string): noLoader noLeftCol skipallbutpage skipservice i would like to rewrite only link that begin with 'http://dev.netdoor.fr' or '.' examples: a href=http://dev.netdoor.fr/index.php?page=./comptes/index.phpnoLoadernoLeftColidx=6bdx=423skipservice;test/a =must be not rewritted! a class=myclass href=./index.php?page=./comptes/mediatheque/index.phpfilter=mov;flv;mpegidx=7name/a =must be rewritted like this : a class=myclass href=javascript:void(0); OnClick=javascript:yui_fastLoader(\'./systeme/chargeur.php?page=./comptes/mediatheque/index.phpfilter=mov;flv;mpegidx=7\');name/a Please help me...:0) best regards nicolas
Re: [PHP] Custom database session handler and data concurrent access from ajax request
Nobody could help me??? THX - Original Message - From: [EMAIL PROTECTED] To: php-general@lists.php.net Sent: Thursday, May 03, 2007 11:45 AM Subject: [PHP] Custom database session handler and data concurrent access from ajax request Hi, i'm currently working on a web site that use AJAX requests to load a web page by part. So, my apache server gives quickly an answer and current client must wait a little bit in order to have the entire web page, but while this loading step, he can already see my partially displayed web page and use it! This web site uses php session, based on cookies, but not only cookies (cookies are just prefered). session.auto_start is false in order to allow object declarations before session starts (so I can stored little object in session) There is no session handler defined in php.ini, line has been commented). In each php script, i start manually the session with session_start and i use register_shutdown to register session_write_close in order to write current session when the current script is finished. Sessions are managed in a mysql database, with autocommit enabled. I'm using mysql_pconnect in my handler to read/write session data (same user, same password, same host, always). Read/write session into database works...but not fine. Scenario: scripts are parts of a main page, scripts are called by ASYNC AJAX GET Script 1 modifies an object A from session and re-serializes it into session, Script 2 is launched when client is receiving a response from the server for script 1(php output buffering is enabled), Script 2 displayed object A content from session and flush object A content, re-serializes it into session, but sometime Script 2 doesn't displayed object A modification by script 1. More terrible, reloading the entire page displays all the content of the modified object A (but script 2 has flushed its content!) I'm asking if custom session handler must implement mutex system or anything to prevent concurrent access and terrible random errors of session writing/reading and moreConcurrent access does'nt seems to be safely managed natively... Any idea? comment? I can sent my session handler php class -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Fw: [PHP] Custom database session handler and data concurrent access from ajax request
- Original Message - From: Nicolas Quirin [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, May 03, 2007 6:22 PM Subject: Re: [PHP] Custom database session handler and data concurrent access from ajax request Ok thanks a lot to confirm my problem. I have partially implemented a write/read session class handler (not the customized session save handler wich read/write data from database) This class is only a semaphore manager for read/write object in the current session. Semaphore is created if not existent, semaphore is acquired if free, blocking if process must wait for this ressource. From my first tests of it, less error occured... But having a semaphore by safe object stored in the current session is cost memory issue: a created semaphore must have a time to live equal to the life time of the current session since i could'nt know which script is executed before another and which script could remove the semaphore... So semaphore are removed by session garbage collector. :-s. This issue cannot support 1 connected users...I think: 1 * (nbsafeobjet * semaphore memory size) = ARGH To finish, I must create a file per semaphore since sem_get require an id generated with ftock()!!! Heavy issue Is this solution really bad? I have search and find another solution : flock() and create a file per safe objet in the session. - Original Message - From: Richard Lynch [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: php-general@lists.php.net Sent: Thursday, May 03, 2007 5:59 PM Subject: Re: [PHP] Custom database session handler and data concurrent access from ajax request On Thu, May 3, 2007 4:45 am, [EMAIL PROTECTED] wrote: Sessions are managed in a mysql database, with autocommit enabled. I'm using mysql_pconnect in my handler to read/write session data (same user, same password, same host, always). As noted in the user comments of the on-line manual, the sample code in the manual does not (last I checked) handle the race condition of multiple AJAX (or other) requests. Several work-arounds are proposed, I believe. I'm asking if custom session handler must implement mutex system or anything to prevent concurrent access and terrible random errors of session writing/reading and moreConcurrent access does'nt seems to be safely managed natively... Yes. You *do* need to deal with this, and the sample code on php.net doesn't do that. It only works for the Web 1.0 (?) idea of interaction with serial requests to alter session. Any idea? comment? I can sent my session handler php class Some kind of lock/mutex/whatever will be needed -- which will make your AJAX calls serial, not parallel. So you want to MINIMIZE your session writing section of code, call session_write_close at the end of it, and do that as soon as possible at the tip-top of the script, to make the serial-ness of the scripts as low-impact as possible. Also re-consider if you really really need to cram as much stuff into a session as you originally architected. Often-times I've seen folks putting an awful lot of stuff in session data, and they don't NEED to, it was just convenient -- Once you start down the AJAX road, it seems to me like you want to re-think that convenience and go for minimalism of what you write into a session. But I ain't been down that road, so maybe I'm full of it. :-) -- Some people have a gift link here. Know what I want? I want you to buy a CD from some indie artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
