Posts Tagged with "php"

If you would like to use same PHP code to handle both AJAX and non-AJAX requests, here is a quick and simple trick that you can use to check if the incoming request is AJAX. For our trick we will use a HTTP header called HTTP_X_REQUESTED_WITH. It is supported by all modern browsers that support AJAX. Therefore, it should work in 99% of cases.

Thanks to nightbloos I can continue posting funny code samples that developers meet/write from time to time. :)

Here is another good example of how NOT to do! Please, do not try this at home! This stunt was performed by untrained professionals.  :)

<?php
$forReplace = array(",","."," ","-", "+", "#""/");
foreach($forReplace as $repl){
	$find = str_replace($repl,'',$find)
}

Obviously, in this case a regular expression function must have been used.

If you have another good examples of a funny code samples, please leave it in the comments. ;)

Some exciting and promising coming changes in PHP 6 or 7 have been anounced recently by Dmitry Stogov from Zend. A detailed article has been postd here http://news.php.net/php.internals/73888. 

Briefly, Zend is working on PHP NG (next generation) which will bring better performance and better memory management. According to Dmitry, the PHP application execution typically takes a significant part of the execution time dealing with memory allocations, and that affects PHP performance significantly as well.

I spent a significant amount of time experimenting with JIT, and even created a PoC of transparent LLVM based JIT compiler embedded into OPCache. The results on bench.php was just amazing – (0.219 seconds against 2.175 – *10 times speedup of PHP 5.5*), but on real-life apps we got just few percent speedup., - says Dmitry in his report.

According to his tests PHP developers can gain up to 20% more requests per second (in case with Wordpress for example).

So far it looks like upgrading to PHP NG should be painless (that's the idea). However, some of PHP extensions wil might require some "massage".

Looking forward to test the new PHP 6. Or maybe 7? ;)

Recently, I have written about comparisons of numbers with floating point. Here is another important lesson that explains why loose comparison may break the business logic in your PHP application.

Look at the following PHP code. It seems pretty clear and straightforward.