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instantiate a class from a variable in PHP?

I know this question sounds rather vague so I will make it more clear with an example: 5 Answers ...
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printf format specifiers for uint32_t and size_t

I have the following 4 Answers 4 ...
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Android: How to put an Enum in a Bundle?

How do you add an Enum object to an Android Bundle? 12 Answers 12 ...
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What is the Objective-C equivalent for “toString()”, for use with NSLog?

Is there a method that I can override in my custom classes so that when 5 Answers 5 ...
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grepping using the “|” alternative operator

The following is a sample of a large file named AT5G60410.gff: 5 Answers 5 ...
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How to JSON serialize sets?

I have a Python set that contains objects with __hash__ and __eq__ methods in order to make certain no duplicates are included in the collection. ...
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Check if page gets reloaded or refreshed in JavaScript

I want to check when someone tries to refresh a page. 10 Answers 10 ...
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Converting PKCS#12 certificate into PEM using OpenSSL

I have OpenSSL x64 on Windows 7 which I downloaded from openssl-for-windows on Google Code . I'm attempting to run: 5 Answ...
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How to check if object (variable) is defined in R?

I'd like to check if some variable is defined in R - without getting an error. How can I do this? 6 Answers ...
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Postgres unique constraint vs index

As I can understand documentation the following definitions are equivalent: 8 Answers ...