Re: [PHP] Re: about php comet
On Fri, Jun 3, 2011 at 1:50 AM, 李白|字一日 calid...@gmail.com wrote: any idea? 2011/5/25 李白|字一日 calid...@gmail.com hello, I am every interested in comet applications recently, and sadly found php is very weak in this area. i am just wondering if it is possible to write an extension to extend the ability of the php to easy the way to comet applications? if it possible for php to hold the connect from the client when it is in fast cgi mode or apache mod php mode? Comet can use one of several techniques for low-latency data ( http://cometdaily.com/about/), with the long-polling mechanism to simulate the realtime pushing of data from the server being a popular option: http://cometdaily.com/2007/11/15/the-long-polling-technique/ http://en.wikipedia.org/wiki/Comet_(programming) http://en.wikipedia.org/wiki/Comet_(programming)To my understanding, PHP itself can accommodate this quite nicely. Merely start an infinite loop that breaks and returns new data when available. You'll probably have to adjust your web server settings and php.ini configuration to allow reasonably long requests for this particular need. However, when requests do time out, it's not a big deal as the javascript should be set up to reinitiate a new request if that happens, just as it would if the request returned new data and closed, giving the appearance of a continuous stream of pushed data. This all said, if you wanted to write an extension to facilitate long polling, you could, but given the natural latencies for these requests, I'm not sure you'd find a significant benefit. Adam -- Nephtali: A simple, flexible, fast, and security-focused PHP framework http://nephtaliproject.com
Re: [PHP] Re: about php comet
is there an efficient way to hold the requests while loop is an expensive way in most cases. and i don't know how to notify the holding connections if the change need to be notify to the holding requests? writing extension to php is also a very expensive way for me:( 2011/6/3 Adam Richardson simples...@gmail.com On Fri, Jun 3, 2011 at 1:50 AM, 李白|字一日 calid...@gmail.com wrote: any idea? 2011/5/25 李白|字一日 calid...@gmail.com hello, I am every interested in comet applications recently, and sadly found php is very weak in this area. i am just wondering if it is possible to write an extension to extend the ability of the php to easy the way to comet applications? if it possible for php to hold the connect from the client when it is in fast cgi mode or apache mod php mode? Comet can use one of several techniques for low-latency data ( http://cometdaily.com/about/), with the long-polling mechanism to simulate the realtime pushing of data from the server being a popular option: http://cometdaily.com/2007/11/15/the-long-polling-technique/ http://en.wikipedia.org/wiki/Comet_(programming) http://en.wikipedia.org/wiki/Comet_(programming)To my understanding, PHP itself can accommodate this quite nicely. Merely start an infinite loop that breaks and returns new data when available. You'll probably have to adjust your web server settings and php.ini configuration to allow reasonably long requests for this particular need. However, when requests do time out, it's not a big deal as the javascript should be set up to reinitiate a new request if that happens, just as it would if the request returned new data and closed, giving the appearance of a continuous stream of pushed data. This all said, if you wanted to write an extension to facilitate long polling, you could, but given the natural latencies for these requests, I'm not sure you'd find a significant benefit. Adam -- Nephtali: A simple, flexible, fast, and security-focused PHP framework http://nephtaliproject.com
Re: [PHP] Re: about php comet
On Fri, Jun 3, 2011 at 2:20 AM, 李白|字一日 calid...@gmail.com wrote: is there an efficient way to hold the requests while loop is an expensive way in most cases. You can call sleep(number_of_seconds_to_sleep) within the while loop to lower the cost, so to speak. and i don't know how to notify the holding connections if the change need to be notify to the holding requests? Sorry, I'm not sure what you mean here. Let's say you were checking a db table for new rows. When a new row appeared, you'd break out of the loop and return the data to the page with the javascript that initiated the request (maybe you're PHP is returning JSON, XML, or an HTML fragment for the javascript to manipulate.) The javascript would update the page content and then initiate a new long-polling request and wait for new data. writing extension to php is also a very expensive way for me:( I agree with you. That's in part why I suggested that the extension wouldn't be needed or worthwhile in this case and basic PHP would be a reasonable solution. -- Nephtali: A simple, flexible, fast, and security-focused PHP framework http://nephtaliproject.com
Re: [PHP] Re: about php comet
On Fri, Jun 3, 2011 at 3:43 AM, 李白|字一日 calid...@gmail.com wrote: 2011/6/3 Adam Richardson simples...@gmail.com On Fri, Jun 3, 2011 at 2:20 AM, 李白|字一日 calid...@gmail.com wrote: is there an efficient way to hold the requests while loop is an expensive way in most cases. You can call sleep(number_of_seconds_to_sleep) within the while loop to lower the cost, so to speak. yes, an interrupt will be a better way. currently libevent is in beta state, and i don't know if the libevent extension can be used in mod_php to implement comet applications. Oh, I see. Yes, I'm not sure I'd try using that extension yet. and i don't know how to notify the holding connections if the change need to be notify to the holding requests? Sorry, I'm not sure what you mean here. please forgive my poor english, i mean we may have projects need interaction with mulitple users and the state changes of one user should be send to the users involved, like online games chatting rooms. I believe I understand you, now. This could get costly in terms of resources, and I now better understand your interest in the libevent extension. I'd be tempted to write custom C extensions for a web server like nginx, which naturally handles asynchronous IO. And, in this case, you could even make use of fast polling instead of long polling, due to the performance of nginx, such as demonstrated in the this example: http://amix.dk/blog/post/19414 And, don't worry about your English too much. My Chinese stops after ni hao ;) Adam -- Nephtali: A simple, flexible, fast, and security-focused PHP framework http://nephtaliproject.com
Re: [PHP] Re: about php comet
On Fri, Jun 3, 2011 at 7:11 AM, Adam Richardson simples...@gmail.comwrote: On Fri, Jun 3, 2011 at 1:50 AM, 李白|字一日 calid...@gmail.com wrote: any idea? 2011/5/25 李白|字一日 calid...@gmail.com hello, I am every interested in comet applications recently, and sadly found php is very weak in this area. i am just wondering if it is possible to write an extension to extend the ability of the php to easy the way to comet applications? if it possible for php to hold the connect from the client when it is in fast cgi mode or apache mod php mode? Comet can use one of several techniques for low-latency data ( http://cometdaily.com/about/), with the long-polling mechanism to simulate the realtime pushing of data from the server being a popular option: http://cometdaily.com/2007/11/15/the-long-polling-technique/ http://en.wikipedia.org/wiki/Comet_(programming) http://en.wikipedia.org/wiki/Comet_(programming)To my understanding, PHP itself can accommodate this quite nicely. Merely start an infinite loop that breaks and returns new data when available. You'll probably have to adjust your web server settings and php.ini configuration to allow reasonably long requests for this particular need. However, when requests do time out, it's not a big deal as the javascript should be set up to reinitiate a new request if that happens, just as it would if the request returned new data and closed, giving the appearance of a continuous stream of pushed data. This all said, if you wanted to write an extension to facilitate long polling, you could, but given the natural latencies for these requests, I'm not sure you'd find a significant benefit. One word of caution... While PHP can be used to implement long polling, bear in mind that PHP is fairly expensive in terms of resource usage per connection. Unless you're swimming in servers or only expecting a few concurrent connections at any one time, I'd recommend using something that holds multiple connections per process, rather than one process per connection. IMO, web-based PHP is not the right solution to this problem. You could write a select-based comet server in PHP, but it definitely wouldn't be in my top 10 language choices. I've just seen a later email in this thread that mentions that this is a chat-type system. Watch this and have your mind blown... http://vimeo.com/20605470 - at some point he describes how to write a pretty efficient chat server in PHP using ZeroMQ, but the whole thing is worth watching. -Stuart -- Stuart Dallas 3ft9 Ltd http://3ft9.com/
Re: [PHP] Re: about php comet
2011/6/3 Adam Richardson simples...@gmail.com On Fri, Jun 3, 2011 at 3:43 AM, 李白|字一日 calid...@gmail.com wrote: 2011/6/3 Adam Richardson simples...@gmail.com On Fri, Jun 3, 2011 at 2:20 AM, 李白|字一日 calid...@gmail.com wrote: is there an efficient way to hold the requests while loop is an expensive way in most cases. You can call sleep(number_of_seconds_to_sleep) within the while loop to lower the cost, so to speak. yes, an interrupt will be a better way. currently libevent is in beta state, and i don't know if the libevent extension can be used in mod_php to implement comet applications. Oh, I see. Yes, I'm not sure I'd try using that extension yet. and i don't know how to notify the holding connections if the change need to be notify to the holding requests? Sorry, I'm not sure what you mean here. please forgive my poor english, i mean we may have projects need interaction with mulitple users and the state changes of one user should be send to the users involved, like online games chatting rooms. I believe I understand you, now. This could get costly in terms of resources, and I now better understand your interest in the libevent extension. I'd be tempted to write custom C extensions for a web server like nginx, which naturally handles asynchronous IO. And, in this case, you could even make use of fast polling instead of long polling, due to the performance of nginx, such as demonstrated in the this example: http://amix.dk/blog/post/19414 thanks for the advice, but i don't know if it can be integrated into web pages. where in web pages, browsers will stop the requests to different ports even when the url having the save domain name. if i want to host more pages, add more interactions, it would be every difficult. so it would be better to have php solutions to make it easier :) And, don't worry about your English too much. My Chinese stops after ni hao ;) ni hao is a good start:) Adam -- Nephtali: A simple, flexible, fast, and security-focused PHP framework http://nephtaliproject.com
[PHP] Re: about php comet
any idea? 2011/5/25 李白|字一日 calid...@gmail.com hello, I am every interested in comet applications recently, and sadly found php is very weak in this area. i am just wondering if it is possible to write an extension to extend the ability of the php to easy the way to comet applications? if it possible for php to hold the connect from the client when it is in fast cgi mode or apache mod php mode? thanks.
[PHP] Re: About PHP/MYSQL Pagination
Kelvin Park wrote: I just couldn't find it anywhere, google or yahoo. I know how to make first, previous, last, and next links for php/mysql pagination. How do you list page numbers in the middle, between previous and next? (ex. first previous | 1 2 3 4 5 | next last ) I know how to display them from 1 to whatever by using for loop, but the problem comes in when I click next from page 5, it does not get re-listed starting from page 6. nevermind, I figured it out. didn't know it was quite easy -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Re: About PHP/XML/XSLT/MYSQL Web Sites
Although it is necessary to convert SQL data into XML before it can be processed in an XSL transformation, it is a waste of time converting user input into XML before it is added to the database as none of the SELECT/INSERT/UPDATE/DELETE commands can work with XML files. It is far easier to take the GET/POST array and convert it into an sql query directly without any intermediate XML. This is what i have been trying to express to OP. Also, i havent had time to fully explore your application framework, but i have had a glimpse at it. i really appreciate your explanation of modularizing the xsl templates as i was struggling to grasp this with my limited exposure to xsl. i read up about you on your site and discovered you had been using xsl prior to php. i am the reverse of that, so while ive been using php for a few years now xsl is still very new to me. your documentation and articles are quite excellent. i hope you dont mind if i ask a couple questions in the future myself :) -nathan On 7/13/07, Tony Marston [EMAIL PROTECTED] wrote: Although it is necessary to convert SQL data into XML before it can be processed in an XSL transformation, it is a waste of time converting user input into XML before it is added to the database as none of the SELECT/INSERT/UPDATE/DELETE commands can work with XML files. It is far easier to take the GET/POST array and convert it into an sql query directly without any intermediate XML. FYI a complete framework which creates all HTML using XML+XSL has already been built, and is described at http://www.tonymarston.net/php-mysql/infrastructure.html#figure5, with a working sample application which is described in and can be downloaded from http://www.tonymarston.net/php-mysql/sample-application.html -- Tony Marston http://www.tonymarston.net http://www.radicore.org Kelvin Park [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I'm trying to setup a XSLT based web site. I wasn't exactly sure about the flow of the whole system when data from relational database is transferred to XML and in turn the data inputted from the user is relayed back to the database through XML (or directly to the database with PHP DB connection). I built a flowchart illustrating what the flow of the XSLT/PHP/MYSQL system might be like. If you think it's the wrong way or an inefficient way of getting user inputted data back to mysql, I would appreciate any comments. If you cannot download the PDF file, you can bring it up with direct address the the file: http://www.envigan.net/CMSFLOW.pdf -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: About PHP/XML/XSLT/MYSQL Web Sites
Although it is necessary to convert SQL data into XML before it can be processed in an XSL transformation, it is a waste of time converting user input into XML before it is added to the database as none of the SELECT/INSERT/UPDATE/DELETE commands can work with XML files. It is far easier to take the GET/POST array and convert it into an sql query directly without any intermediate XML. FYI a complete framework which creates all HTML using XML+XSL has already been built, and is described at http://www.tonymarston.net/php-mysql/infrastructure.html#figure5, with a working sample application which is described in and can be downloaded from http://www.tonymarston.net/php-mysql/sample-application.html -- Tony Marston http://www.tonymarston.net http://www.radicore.org Kelvin Park [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I'm trying to setup a XSLT based web site. I wasn't exactly sure about the flow of the whole system when data from relational database is transferred to XML and in turn the data inputted from the user is relayed back to the database through XML (or directly to the database with PHP DB connection). I built a flowchart illustrating what the flow of the XSLT/PHP/MYSQL system might be like. If you think it's the wrong way or an inefficient way of getting user inputted data back to mysql, I would appreciate any comments. If you cannot download the PDF file, you can bring it up with direct address the the file: http://www.envigan.net/CMSFLOW.pdf -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Re: about PHP
On 9/20/05, Srinivasan Kumar [EMAIL PROTECTED] wrote: hello sir, I am srinivasan,I am a web designer.I hered about PHP is the safest pages while using monetory transaction, mmm! nop, PHP is not providing anything to secure your transactions otherthan few fuctions to handle your login sessions and support on few data encryption functions. but you can develop a good web application/website using PHP. so i want to learn about the PHP. so only I need to view or run the PHP Pages in my local server PHP is a server side scripting language, to use php for your website, you have to install php on your webserver and configure PWS to handle php pages. for this you need to read some manuals and spent some time on research and development work. i recomend you to read a lttle and slowly start PHPing. http://forums.devarticles.com/archive/t-2574/Article-Discussion-Installing-PHP-Under-Personal-Web-Server ~viraj. (i.e.PWS) so only i am asking how to view the PHP pages in my local server (i.e.PWS)as a asp page thanking you for your kindly reply K.Srinivasan --- viraj [EMAIL PROTECTED] wrote: On 9/20/05, Srinivasan Kumar [EMAIL PROTECTED] wrote: sir, this is srinivasan i have to know about the php.i.e. Google is your friend! ..the best is to search/read a bit more about PHP. follow these links.. http://www.php.net/tut.php http://www.google.com/search?hl=enlr=oi=defmoreq=define:PHP how can i view the php pages in windows98 PWS?.could please be specific. write a little more, explaining what you want to do with php and your current knowledge in programming. so the others on the list can help you better to solve your issue. ~viraj. you reply in this regard. thanking you k.srinivasan Gabor Hojtsy [EMAIL PROTECTED] wrote:Dear Srinivasan Kumar, Since your problem has nothing to do with webmastering of the php.net website, it does not belong in here Please contact php-general@lists.php.net (a mailing list) with support questions or see http://php.net/support for more support options. __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: about PHP
sir, this is srinivasan i have to know about the php.i.e. how can i view the php pages in windows98 PWS?.could you reply in this regard. thanking you k.srinivasan Gabor Hojtsy [EMAIL PROTECTED] wrote:Dear Srinivasan Kumar, Since your problem has nothing to do with webmastering of the php.net website, it does not belong in here Please contact php-general@lists.php.net (a mailing list) with support questions or see http://php.net/support for more support options. Regards, Gabor Hojtsy Srinivasan Kumar wrote: sir, this is srinivasan i have to know about the php.i.e. how can i view the php pages in windows98 PWS?.could you reply in this regard. thanking you k.srinivasan __ Yahoo! Mail - PC Magazine Editors' Choice 2005 http://mail.yahoo.com - Yahoo! for Good Click here to donate to the Hurricane Katrina relief effort.
Re: [PHP] Re: about PHP
On 9/20/05, Srinivasan Kumar [EMAIL PROTECTED] wrote: sir, this is srinivasan i have to know about the php.i.e. Google is your friend! ..the best is to search/read a bit more about PHP. follow these links.. http://www.php.net/tut.php http://www.google.com/search?hl=enlr=oi=defmoreq=define:PHP how can i view the php pages in windows98 PWS?.could please be specific. write a little more, explaining what you want to do with php and your current knowledge in programming. so the others on the list can help you better to solve your issue. ~viraj. you reply in this regard. thanking you k.srinivasan Gabor Hojtsy [EMAIL PROTECTED] wrote:Dear Srinivasan Kumar, Since your problem has nothing to do with webmastering of the php.net website, it does not belong in here Please contact php-general@lists.php.net (a mailing list) with support questions or see http://php.net/support for more support options. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: About php and mysql
mysql_connect(IP, username, password); [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hello, I want to know how to control php program connect to MySQL Database System ( another computer machine ) ? Thank a lots. Ed. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: ? about PHP includes
I just discovered PHP this week. I'm reading about include statements. If I have a text file 2000 characters in length that I want to include, I would do this to include to whole file: ?php include (file.txt); ? http://php.net/fopen http://php.net/fread ?php $path = file.txt; $file = fopen($path, 'r') or die(Could not open $path. Try full path or something.); $data = fread($file, 250); echo $data; ? Note that include not only includes a text file, but also executes any ?php ? tags within it. So it's not ideal for sucking in a whole plain text file anyway. Check out http://php.net/readfile -- WARNING [EMAIL PROTECTED] address is an endangered species -- Use [EMAIL PROTECTED] Wanna help me out? Like Music? Buy a CD: http://l-i-e.com/artists.htm Volunteer a little time: http://chatmusic.com/volunteer.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
