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• PHP: How do I find out if someone is from the US from his/her IP Address?

  - by lucha libre

  I don't want anything incredibly complicated. I am working on a client outside the US, and I just want a basic check to see if someone is accessing his page from the US or not. After that, I am going to default the language in either English or Spanish, after determining where the visitor is from. Thanks.

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• PHP, better to set the variable before if or use if/else?

  - by DssTrainer

  So a simple one that I just never could find a straight answer on. What is better (performance or otherwise): $var = false; If ($a == $b) { $var = true; } or If ($a == $b) { $var = true; } else { $var = false; } I've heard arguments for both ways. I find the first cleaner to ensure I have it set, and a little less code too. The pro being that you may only need to set it once without conditional. But the con being that if the argument is true, it gets set twice. I am assuming the second way is probably best practice

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• How to detect the MAC address of the user viewing our website using PHP?

  - by Starx

  I know how to track down an IP address, but I need to track down the MAC address of the users viewing my page. How to accomplish this?

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• What are the fundamental differences ASP.net and PHP?

  - by palhmbus

  Are there speed differences, performance issues, and what reasons do businesses have when they choose one or the other... and is there a learning curve steeper for one over the other? Also... are you likely to be paid more using one over the other?

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• Are there any Open source Admin Panel based on PHP and jQuery?

  - by Pablo

  I've try many CMS flavors like MODx, Drupal, Joomla for the admin Panel but they can't seem to manage my existing data, like the users. Im planing on building a admin Control Panel for my site and i was wondering if there is something out there which i can start working with instead of starting from scratch. UPDATE: To do simple tasks like: Managing my users Managing my content( the site is an image sharing site, so in this case images) I was looking more into a graphical interface more then a system as i have lots of costume content and data like the users.

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• Is it good practise to use meta refresh tags for redirects instead of header() function in php?

  - by Kent

  I have to use redirects a lot in my scripts, for example after a user logs in I need to redirect them to the admin area, etc. But I find it inconvenient to always have to have the header function at the very top. So if I use the meta refresh tags for my redirects, is that something that would be frowned upon according to best practices or is it acceptable? function redirect($location) { echo "<meta http-equiv='refresh' content='0; url=$location' />"; }

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• how to retrieve substring from string having variable length of character in php?

  - by user187580

  Hello I have some data in the format of C222 = 50 C1234P687 = 'some text' C123YYY = 'text' C444 = 89 C345 = 3 C122P687 = 'some text' C122YYY = 'text' .... .... so basically 3 different forms "C" number = value, example - C444 = 89 "C" number "P" number = value, example - C123P687 = 'some text' "C" number "YYY" = value Only number is of variable length on the left side of (=) sign. Values vary. I want to store the data in db as INSERT INTO datatable c_id = "number after C" p_id = "number after P" // if it exists for a line of data value = 'value' yyy = 'value' Any ideas how to retrieve these numbers? Thanks

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• is it a bad idea to load into memory 160000 variables in a php script?

  - by user1397417

  im processing a large file with sentences, i only care about the lines that have english or japanese, so while im reading the file, if i find english or japanese sentence, i want to just save it in an array and after finished reading, open another file for writting and output all the sentences in the array. this would result in me setting about 160,000 variables. all strings, some short some long. just wondering if its a bad idea to for memeory to set so many values? example line from the file: "1978033 jpn ?????????????????????"

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• How to remove all non-alphanumeric and non-space characters from a string in PHP?

  - by Daniel

  I want to remove all non-alphanumeric and space characters from a string. So I do want spaces to remain. What do I put for a space in the below function within the [ ] brackets: ereg_replace("[^A-Za-z0-9]", "", $title); In other words, what symbol represents space, I know \n represents a new line, is there any such symbol for a single space.

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• PHP - turning register globals off, what is the best way to go about fixing the code?

  - by user187809

  I am working on a old code base, where programmers assumed that register_globals will always be on. Hence variables are used without $_GET or $_POST prefix, pretty much in every page (the code base is huge, hundreds of scripts). I tried turning it off, but the very first script (login script) goes on an infinite loop. I understand that going through one script at a time, and one line at a time and fixing the variables is probably the only option (adding the prefix $_GET or $_POST as the case may be). Has anyone does this before? How did you go about doing it? Any advice?

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• Why is it inserting 0's instead of blank spaces into my DB using php?

  - by zeckdude

  I have an insert: $sql = 'INSERT into orders SET fax_int_prefix = "'.$_SESSION['fax_int_prefix'].'", fax_prefix = "'.$_SESSION['fax_prefix'].'", fax_first = "'.$_SESSION['fax_first'].'", fax_last = "'.$_SESSION['fax_last']; The value of all of these fields is that they are blank right before the insert. Here is an example of one of them I echo'd out just before the insert: $_SESSION[fax_prefix] = For some reason it inserts the integer 0, instead of a blank value or null, as it should. Why is it inserting 0's instead of blank spaces into my DB?

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• Under what circumstances is Python preferrable to PHP for web development, and vice versa? [closed]

  - by z-boss

  There should be reasons other than "it depends"!

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• mysql_num_rows(): supplied argument is not a valid MySQL result resource

  - by php-b-grader

  I am getting this error when I pass an invalid SQL string... I spent the last hour trying to find the problem assuming - It's not my SQL it must be the db handle... ANyway, I've now figured out that it was bad SQL... What I want to do is test the result of the mysql_query() for a valid resultset. I am simply using empty($result)... Is this the most effective test? Is there a more widely accepted method of testing a resultset for a valid result?

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• How should I make up for the lack of static initializers in PHP?

  - by kahoon

  I'm thinking about putting every class into a separate file and doing the static initialization outside of the class definition. The problem with this is the fact that the initialization will happen before the said class is actually needed (it will happen when the file which contains the class is included for the first time). It's a problem, because it may happen that the class won't be used at all, hence the initialization is unnecessary. And I think the practice of including the used files not in the beginning of your code is simply a dirty technique. If anybody has a viable solution to this problem, I would greatly appreciate it.

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• Is there a common method for implementing pagination through PHP data objects?

  - by ThinkingInBits

  I am going to be implementing a small custom CMS for a website. I was wondering if there are any more popular methods for implementing pagination using OOP. Thanks!

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• Why is it that I can't reference a global variable directly in PHP?

  - by DKinzer

  I'm curious to know why the following code behaves differently? The following does not work: $_variable &= global $_global; echo $_variable; The following works: global $global; $_variable &= $_global; echo $_variable; ?

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• Wait 30 seconds in order to allow a new action on PHP and MySQL ???

  - by DomingoSL

  Hello, in my web page a user fill a form who send information to a MySql database. One of the data inputs sent is a date/time, in the format date('l jS \of F Y h:i:s A'); (I can change the format as needed) So when the user submits the form i wanna check if the actual time/date is 30 seconds more than the sent time/date in order to allow or not the submission of the form. Thanks!

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• Why do I need the isset() function in php?

  - by Chris

  I am trying to understand the difference between this: if (isset($_POST['Submit'])) { //do something } and if ($_POST['Submit']) { //do something } It seems to me that if the $_POST['Submit'] variable is true, then it is set. Why would I need the isset() function in this case?

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• Is it possible to detect what operating system a user is coming from using PHP? (mac or windows)

  - by Henryz

  Let's say for example I wanted to echo "You are using Windows!" or "You are using Macintosh!", depending on the users OS. Is this possible?

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• php - Is it possible to count the number of keys in an array?

  - by Steven

  I've googled this but found no answers, so I guess it's not possible. If there is a way, I'd love to know it. Thanks

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• How do I create a timed ban on an account? (PHP/mysql)

  - by ggfan

  I want to create a function that allows me to ban an account for 10days. In the dbc, I have a field called "ban" and Boolean of 1=notban, 0=ban. I also have a field called "date_banned" which is just the timestamp of when the user got banned. My question is how do I create a time frame of 10days from the date the user was banned? ex: James was banned on "2010-05-03 20:43:48". So how can I go about adding 10days to the timestamp? And after 10days, it would set the "ban" equal to 1(which is not banned).

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• problem with logout(php) i am new to the site so still have problem in asking questions

  - by jabsy

  I'm getting a problem here when i try to logout, the session is destroy but i still can go inside to that page and view details without login first by using browser mozilla Back button or history cache! How can i solve that? Anybody help me please... code for logout is

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• How do I create a dynamic method in PHP?

  - by sandelius

  I'm trying to extend my ActiveRecord class with some dynamic methods. I would like to be able to run this from my controller $user = User::find_by_username(param); $user = User::find_by_email(param); I've read a little about overloading and think that's the key. I'v got a static $_attributes in my AR class and I get the table name by pluralizing my model (User = users) in this case. How do I do this? All models extends the ActiveRecord class.

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• How to get a random value from 1~N but excluding several specific values in PHP?

  - by Runner

  rand(1,N) but excluding array(a,b,c,..), is there already a built-in function that I don't know or do I have to implement it myself(how?) ?

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• How to convert a child instance to parent class and the reverse in PHP?

  - by symfony

  $child_instance = (childClass)$parent_instance; $parent_instance = (parentClass)$child_instance; Or is it possible?

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