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Why are the PHP multi-byte string functions (the ones which start with mb_) not used by default in PHP?

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  • The double-negative way of asking is a little unusual. Commented Oct 3, 2012 at 20:09
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    Compatibility! (The answer to 99% of "why isn't this better thing the default?" questions.) Commented Oct 3, 2012 at 20:09
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    Compatibility and shitty design. Commented Oct 3, 2012 at 20:14

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Backwards compatibility. Old PHP scripts depend on non-multibyte functionality.

See also: http://www.php.net/manual/en/mbstring.overload.php

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Because non-multibyte functions were there first.

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