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answers:

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Where can I get a complete list of all multi-byte functions for PHP? I need to go through my application and switch the non MB string functions to the new mb functions.

+2  A: 

And for the "and switch the non MB string functions to the new mb functions" part of the question: You might be interested in http://php.net/mbstring.overload:

mbstring supports a 'function overloading' feature which enables you to add multibyte awareness to such an application without code modification by overloading multibyte counterparts on the standard string functions. For example, mb_substr() is called instead of substr() if function overloading is enabled. This feature makes it easy to port applications that only support single-byte encodings to a multibyte environment in many cases.

VolkerK