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Which version of CodeIgniter am I currently using?

...deIgniter version number. It's defined in: /system/codeigniter/CodeIgniter.php As of CodeIgniter 2, it's defined in /system/core/CodeIgniter.php For example, echo CI_VERSION; // echoes something like 1.7.1 share ...
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Performance of FOR vs FOREACH in PHP

...on't think it really matters... As for the reference making a difference, PHP uses copy-on-write, so if you don't write to the array, there will be relatively little overhead while looping. However, if you start modifying the array within the array, that's where you'll start seeing differences bet...
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Difference between break and continue in PHP?

What is the difference between break and continue in PHP? 10 Answers 10 ...
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Create subdomains on the fly with .htaccess (PHP)

...s is done in the ServerAlias DOCs Then extract and verify the subdomain in PHP and display the appropriate data The long version 1. Create a wildcard DNS entry In your DNS settings you need to create a wildcard domain entry such as *.example.org. A wildcard entry looks like this: *.example.org....
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Convert timestamp to readable date/time PHP

... Use PHP's date() function. Example: echo date('m/d/Y', 1299446702); share | improve this answer | fo...
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How to determine the first and last iteration in a foreach loop?

...ght? Or relevant at all to this question since it involves HTML? This is a PHP question, clearly... and when it comes to mark-up semantics, it's down to a much deeper facts than "a proper blahblah is always better than blahblah (this is not even my opinion, it's pure fact)" – D...
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PHP 5.4 Call-time pass-by-reference - Easy fix available?

... call by reference in the function definition, not the actual call. Since PHP started showing the deprecation errors in version 5.3, I would say it would be a good idea to rewrite the code. From the documentation: There is no reference sign on a function call - only on function definitions. F...
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Which one is the best PDF-API for PHP? [closed]

Which one of these is the best PDF-API for PHP? 9 Answers 9 ...
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apc vs eaccelerator vs xcache

... APC is going to be included in PHP 6, and I'd guess it has been chosen for good reason :) It's fairly easy to install and certainly speeds things up. share | ...
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How do PHP sessions work? (not “how are they used?”)

...when his session is created. it is stored in a cookie (called, by default, PHPSESSID) that cookie is sent by the browser to the server with each request the server (PHP) uses that cookie, containing the session_id, to know which file corresponds to that user. The data in the sessions files is the ...