php-general Digest 5 Mar 2012 07:03:40 -0000 Issue 7712
php-general Digest 5 Mar 2012 07:03:40 - Issue 7712 Topics (messages 316865 through 316876): Re: Weird Behaviour of Array 316865 by: Ashley Sheridan 316866 by: Stuart Dallas Script execution after window close 316867 by: Nibin V M 316868 by: Ashley Sheridan 316869 by: Nibin V M 316870 by: Govinda 316871 by: Stuart Dallas 316872 by: Nibin V M 316873 by: Govinda 316874 by: Ashley Sheridan 316875 by: Nibin V M Questionnaire on motivation analysis of free open source software and open content (final version 316876 by: George Tsinarakis 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, 2012-03-04 at 20:01 +0530, Ruwan Pathmalal wrote: Hi People, I confused with weird behaviour of array. Following is my script. ?php $array = array( '12_1'=array( 56=array( 23='23', 33='33') ), '12_5'=array( 55='55' ) ); $array['12_5'][55][45] = '45'; $array['12_5'][55][56] = '76'; $array['12_5'][55][85] = '85'; $array['12_5'][55][96] = '96'; print_r($array); ? Output is -: Array ( [12_1] = Array ( [56] = Array ( [23] = 23 [33] = 33 ) ) [12_5] = Array ( [55] = 55 4 7 8 9 ) ) Sometime this is because, first time $array['12_5'][55] not an array. I assigned value to it like array. (I suppose overwrite key and then assign given value as key value pair). See this part of output [12_5] = Array ( [55] = 55 4 7 8 9 ). It compose 4 from 45, 7 from 76, 8 from 85 like that (first digit of assigned values). I manage to overcome this problem by unsettling $array['12_5'][55] before assigning value to it. But I want to know why this happening or is this PHP bug ? (Clear explanation for situation :) ) Thanks Ruwan I think because $array['12_5'][55] is originally a string, and PHP allows you to treat them as arrays of characters (like C++) what is happening is some odd setting of values within the string. This is why when you unset the value or define it as a blank array it is working as expected. -- Thanks, Ash http://www.ashleysheridan.co.uk ---End Message--- ---BeginMessage--- On 4 Mar 2012, at 14:31, Ruwan Pathmalal wrote: I confused with weird behaviour of array. Following is my script. ?php $array = array( '12_1'=array( 56=array( 23='23', 33='33') ), '12_5'=array( 55='55' ) ); $array['12_5'][55][45] = '45'; $array['12_5'][55][56] = '76'; $array['12_5'][55][85] = '85'; $array['12_5'][55][96] = '96'; print_r($array); ? Output is -: Array ( [12_1] = Array ( [56] = Array ( [23] = 23 [33] = 33 ) ) [12_5] = Array ( [55] = 55 4 7 8 9 ) ) Sometime this is because, first time $array['12_5'][55] not an array. I assigned value to it like array. (I suppose overwrite key and then assign given value as key value pair). See this part of output [12_5] = Array ( [55] = 55 4 7 8 9 ). It compose 4 from 45, 7 from 76, 8 from 85 like that (first digit of assigned values). I manage to overcome this problem by unsettling $array['12_5'][55] before assigning value to it. But I want to know why this happening or is this PHP bug ? (Clear explanation for situation :) ) Not a bug. You set $array['12_5'][55] to a string, then you try to use it as an array. Strings can be accessed as arrays. $array['12_5'][55][45] = '45'; This line sets the 45th character in the string to 4 (each element of a string accessed as an array can only contain a single character, so it throws the 5 away). $array['12_5'][55][56] = '76'; $array['12_5'][55][85] = '85'; $array['12_5'][55][96] = '96'; Likewise with these. You're not seeing the additional spaces because you're viewing it as an HTML page. Run it on the command line or add pre before the ?php to see the actual value, which is... 55 4 7 8 9 -Stuart -- Stuart Dallas 3ft9 Ltd http://3ft9.com/---End Message--- ---BeginMessage--- Hello, I need to run a few commands when a user close the browser tab. That is, I have a php page ( index.php ) and it will create a temporary file to track some stuffs. That temporary file should be removed, when the user close the browser tab. Is there any way to achieve this? Thank you, -- Regards Nibin. http://TechsWare.in ---End Message--- ---BeginMessage--- On Sun, 2012-03-04 at 20:49 +0530,
[PHP] Weird Behaviour of Array
Hi People, I confused with weird behaviour of array. Following is my script. ?php $array = array( '12_1'=array( 56=array( 23='23', 33='33') ), '12_5'=array( 55='55' ) ); $array['12_5'][55][45] = '45'; $array['12_5'][55][56] = '76'; $array['12_5'][55][85] = '85'; $array['12_5'][55][96] = '96'; print_r($array); ? Output is -: Array ( [12_1] = Array ( [56] = Array ( [23] = 23 [33] = 33 ) ) [12_5] = Array ( [55] = 55 4 7 8 9 ) ) Sometime this is because, first time $array['12_5'][55] not an array. I assigned value to it like array. (I suppose overwrite key and then assign given value as key value pair). See this part of output [12_5] = Array ( [55] = 55 4 7 8 9 ). It compose 4 from 45, 7 from 76, 8 from 85 like that (first digit of assigned values). I manage to overcome this problem by unsettling $array['12_5'][55] before assigning value to it. But I want to know why this happening or is this PHP bug ? (Clear explanation for situation :) ) Thanks Ruwan
Re: [PHP] Weird Behaviour of Array
On Sun, 2012-03-04 at 20:01 +0530, Ruwan Pathmalal wrote: Hi People, I confused with weird behaviour of array. Following is my script. ?php $array = array( '12_1'=array( 56=array( 23='23', 33='33') ), '12_5'=array( 55='55' ) ); $array['12_5'][55][45] = '45'; $array['12_5'][55][56] = '76'; $array['12_5'][55][85] = '85'; $array['12_5'][55][96] = '96'; print_r($array); ? Output is -: Array ( [12_1] = Array ( [56] = Array ( [23] = 23 [33] = 33 ) ) [12_5] = Array ( [55] = 55 4 7 8 9 ) ) Sometime this is because, first time $array['12_5'][55] not an array. I assigned value to it like array. (I suppose overwrite key and then assign given value as key value pair). See this part of output [12_5] = Array ( [55] = 55 4 7 8 9 ). It compose 4 from 45, 7 from 76, 8 from 85 like that (first digit of assigned values). I manage to overcome this problem by unsettling $array['12_5'][55] before assigning value to it. But I want to know why this happening or is this PHP bug ? (Clear explanation for situation :) ) Thanks Ruwan I think because $array['12_5'][55] is originally a string, and PHP allows you to treat them as arrays of characters (like C++) what is happening is some odd setting of values within the string. This is why when you unset the value or define it as a blank array it is working as expected. -- Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Weird Behaviour of Array
On 4 Mar 2012, at 14:31, Ruwan Pathmalal wrote: I confused with weird behaviour of array. Following is my script. ?php $array = array( '12_1'=array( 56=array( 23='23', 33='33') ), '12_5'=array( 55='55' ) ); $array['12_5'][55][45] = '45'; $array['12_5'][55][56] = '76'; $array['12_5'][55][85] = '85'; $array['12_5'][55][96] = '96'; print_r($array); ? Output is -: Array ( [12_1] = Array ( [56] = Array ( [23] = 23 [33] = 33 ) ) [12_5] = Array ( [55] = 55 4 7 8 9 ) ) Sometime this is because, first time $array['12_5'][55] not an array. I assigned value to it like array. (I suppose overwrite key and then assign given value as key value pair). See this part of output [12_5] = Array ( [55] = 55 4 7 8 9 ). It compose 4 from 45, 7 from 76, 8 from 85 like that (first digit of assigned values). I manage to overcome this problem by unsettling $array['12_5'][55] before assigning value to it. But I want to know why this happening or is this PHP bug ? (Clear explanation for situation :) ) Not a bug. You set $array['12_5'][55] to a string, then you try to use it as an array. Strings can be accessed as arrays. $array['12_5'][55][45] = '45'; This line sets the 45th character in the string to 4 (each element of a string accessed as an array can only contain a single character, so it throws the 5 away). $array['12_5'][55][56] = '76'; $array['12_5'][55][85] = '85'; $array['12_5'][55][96] = '96'; Likewise with these. You're not seeing the additional spaces because you're viewing it as an HTML page. Run it on the command line or add pre before the ?php to see the actual value, which is... 55 4 7 8 9 -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
[PHP] Script execution after window close
Hello, I need to run a few commands when a user close the browser tab. That is, I have a php page ( index.php ) and it will create a temporary file to track some stuffs. That temporary file should be removed, when the user close the browser tab. Is there any way to achieve this? Thank you, -- Regards Nibin. http://TechsWare.in
Re: [PHP] Script execution after window close
On Sun, 2012-03-04 at 20:49 +0530, Nibin V M wrote: Hello, I need to run a few commands when a user close the browser tab. That is, I have a php page ( index.php ) and it will create a temporary file to track some stuffs. That temporary file should be removed, when the user close the browser tab. Is there any way to achieve this? Thank you, Not reliably. There are events in Javascript that you can use to trigger an Ajax call (such as onbeforeunload and onunload) but these work slightly differently from browser to browser and may not allow you to execute anything on the browser if the user is navigating away from the site or closing the tab/window. Why can't you use the session for this, and allow the session to expire after a certain period of inactivity, which would be better than reinventing what sounds like session behaviour. -- Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Script execution after window close
in factI really need to remove the file ( which will be created for every access - making a copy from another location ). I can't leave that file alone for ever in the user disk space! :( On Sun, Mar 4, 2012 at 9:01 PM, Ashley Sheridan a...@ashleysheridan.co.ukwrote: ** On Sun, 2012-03-04 at 20:49 +0530, Nibin V M wrote: Hello, I need to run a few commands when a user close the browser tab. That is, I have a php page ( index.php ) and it will create a temporary file to track some stuffs. That temporary file should be removed, when the user close the browser tab. Is there any way to achieve this? Thank you, Not reliably. There are events in Javascript that you can use to trigger an Ajax call (such as onbeforeunload and onunload) but these work slightly differently from browser to browser and may not allow you to execute anything on the browser if the user is navigating away from the site or closing the tab/window. Why can't you use the session for this, and allow the session to expire after a certain period of inactivity, which would be better than reinventing what sounds like session behaviour. -- Thanks, Ash http://www.ashleysheridan.co.uk -- Regards Nibin. http://TechsWare.in
Re: [PHP] Script execution after window close
in factI really need to remove the file ( which will be created for every access - making a copy from another location ). I can't leave that file alone for ever in the user disk space! :( Fine, so delete it after a period of inactivity -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Script execution after window close
On 4 Mar 2012, at 15:31, Nibin V M wrote: in factI really need to remove the file ( which will be created for every access - making a copy from another location ). I can't leave that file alone for ever in the user disk space! :( Ash is right in that this is exactly what sessions are used for, so unless the data you are storing for the user is fairly large you'd be better off using them: http://php.net/session Why do you need to copy the file? Might be an idea to describe what you're actually doing rather than focus on this particular part. Do you make changes to the file after you've copied it? If not, why not use the original copy? If you do modify is, how and why? I'll bet there's a better way to do what you're doing. If you absolutely need to make these copies, your best bet is to have a script executed by cron periodically to clean up files with a last modified timestamp older than n seconds, and make sure each page request calls the touch function for that user's file to updated the file's timestamp. -Stuart -- Stuart Dallas 3ft9 Ltd http://3ft9.com/ On Sun, Mar 4, 2012 at 9:01 PM, Ashley Sheridan a...@ashleysheridan.co.ukwrote: ** On Sun, 2012-03-04 at 20:49 +0530, Nibin V M wrote: Hello, I need to run a few commands when a user close the browser tab. That is, I have a php page ( index.php ) and it will create a temporary file to track some stuffs. That temporary file should be removed, when the user close the browser tab. Is there any way to achieve this? Thank you, Not reliably. There are events in Javascript that you can use to trigger an Ajax call (such as onbeforeunload and onunload) but these work slightly differently from browser to browser and may not allow you to execute anything on the browser if the user is navigating away from the site or closing the tab/window. Why can't you use the session for this, and allow the session to expire after a certain period of inactivity, which would be better than reinventing what sounds like session behaviour. -- Thanks, Ash http://www.ashleysheridan.co.uk -- Regards Nibin. http://TechsWare.in -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Script execution after window close
ok..I have script which will run based on some values in user's homedir. In fact I have tried to run the script from a various locations; but it didn't work as expected like it run from each users homedir. So, when the user access the page, it will copy the actual script to the user's homedir and executes it. I don't want to leave it there for ever; so I have to remove it from there when the user close the browser ( or after a period of in activity ). But I don't know how to code it :( On Sun, Mar 4, 2012 at 9:08 PM, Govinda govinda.webdnat...@gmail.comwrote: in factI really need to remove the file ( which will be created for every access - making a copy from another location ). I can't leave that file alone for ever in the user disk space! :( Fine, so delete it after a period of inactivity -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- Regards Nibin. http://TechsWare.in
Re: [PHP] Script execution after window close
in factI really need to remove the file ( which will be created for every access - making a copy from another location ). I can't leave that file alone for ever in the user disk space! :( Fine, so delete it after a period of inactivity ok..I have script which will run based on some values in user's homedir. In fact I have tried to run the script from a various locations; but it didn't work as expected like it run from each users homedir. So, when the user access the page, it will copy the actual script to the user's homedir and executes it. I don't want to leave it there for ever; so I have to remove it from there when the user close the browser ( or after a period of in activity ). But I don't know how to code it :( My suggestion is to sort out the real issue, rather than try to fix it with the workaround of copying that file to each user's homedir. It sounds like you are just adding unnecessary complexity to your work. Maybe make a new post/thread where you describe THAT issue very carefully.. and what you have tried that is not working the way you thought it should. So far it is not clear enough to me anyway - to help. But that could be because of my shortcomings more than your post's shortcoming; I am not expert on many topics covered on this list, especially in the area of managing your webserver. -Govinda -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Script execution after window close
On Sun, 2012-03-04 at 11:29 -0500, Govinda wrote: in factI really need to remove the file ( which will be created for every access - making a copy from another location ). I can't leave that file alone for ever in the user disk space! :( Fine, so delete it after a period of inactivity ok..I have script which will run based on some values in user's homedir. In fact I have tried to run the script from a various locations; but it didn't work as expected like it run from each users homedir. So, when the user access the page, it will copy the actual script to the user's homedir and executes it. I don't want to leave it there for ever; so I have to remove it from there when the user close the browser ( or after a period of in activity ). But I don't know how to code it :( My suggestion is to sort out the real issue, rather than try to fix it with the workaround of copying that file to each user's homedir. It sounds like you are just adding unnecessary complexity to your work. Maybe make a new post/thread where you describe THAT issue very carefully.. and what you have tried that is not working the way you thought it should. So far it is not clear enough to me anyway - to help. But that could be because of my shortcomings more than your post's shortcoming; I am not expert on many topics covered on this list, especially in the area of managing your webserver. -Govinda To add to what Govinda said, the real problem does indeed seem to be that you're using this hack in order to make your code work, and sorting that would be far more beneficial to you in the long run. On first thoughts, it sounds like a path issue somewhere. If the script isn't run as the user but is just run as the same user from different users directories, then it's probably not a problem with the PATH environment variable (assuming your secondary script is some kind of Bash script). Let's see what you're doing with that and see if we can help. -- Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Script execution after window close
ok..thanks guys...I will check further then. thanks for your inputs :) On Sun, Mar 4, 2012 at 9:59 PM, Govinda govinda.webdnat...@gmail.comwrote: in factI really need to remove the file ( which will be created for every access - making a copy from another location ). I can't leave that file alone for ever in the user disk space! :( Fine, so delete it after a period of inactivity ok..I have script which will run based on some values in user's homedir. In fact I have tried to run the script from a various locations; but it didn't work as expected like it run from each users homedir. So, when the user access the page, it will copy the actual script to the user's homedir and executes it. I don't want to leave it there for ever; so I have to remove it from there when the user close the browser ( or after a period of in activity ). But I don't know how to code it :( My suggestion is to sort out the real issue, rather than try to fix it with the workaround of copying that file to each user's homedir. It sounds like you are just adding unnecessary complexity to your work. Maybe make a new post/thread where you describe THAT issue very carefully.. and what you have tried that is not working the way you thought it should. So far it is not clear enough to me anyway - to help. But that could be because of my shortcomings more than your post's shortcoming; I am not expert on many topics covered on this list, especially in the area of managing your webserver. -Govinda -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- Regards Nibin. http://TechsWare.in
