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Why does the PHP json_encode function convert UTF-8 strings to hexadecimal entities?

I have a PHP script that deals with a wide variety of languages. Unfortunately, whenever I try to use json_encode , any Unicode output is converted to hexadecimal entities. Is this the expected behavior? Is there any way to convert the output to UTF-8 characters? ...
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Caveats of select/poll vs. epoll reactors in Twisted

Everything I've read and experienced ( Tornado based apps ) leads me to believe that ePoll is a natural replacement for Select and Poll based networking, especially with Twisted. Which makes me paranoid, its pretty rare for a better technique or methodology not to come with a price. ...
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See what has been installed via MacPorts

Is there a way to see all I have installed via MacPorts? 1 Answer 1 ...
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Number of days between two NSDates [duplicate]

How could I determine the number of days between two NSDate values (taking into consideration time as well)? 16 Answers ...
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How to determine if a string is a number with C++?

I've had quite a bit of trouble trying to write a function that checks if a string is a number. For a game I am writing I just need to check if a line from the file I am reading is a number or not (I will know if it is a parameter this way). I wrote the below function which I believe was working s...
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reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?

In my multithreaded asmx web service I had a class field _allData of my own type SystemData which consists of few List<T> and Dictionary<T> marked as volatile . The system data ( _allData ) is refreshed once in a while and I do it by creating another object called newData and fill...
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what exactly is device pixel ratio?

this is mentioned every article about mobile web, but nowhere I can found an explanation of what exactly does this attribute measure. Can anyone please elaborate what does queries like this check? ...
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Fatal error: Class 'ZipArchive' not found in

I have a problem that I install 'Archive_Zip 0.1.1' on Linux server, but when I try to run the script to create the zip file it gives the fatal error ...
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How to hide databases that I am not allowed to access

When I connect to my Heroku - Postgresql database via pgAdmin3 , It lists all the tables (about 2600). Every time I open the pgAdmin3 I have to find my own database. ...
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In Xcode, how to suppress all warnings in specific source files?

In my application I use 3rd party code that triggers some warnings. I reviewed them and they can be safely ignored. 3 Answe...