(PHP 3 >= 3.0.6, PHP 4, PHP 5)
utf8_encode -- Encodes an ISO-8859-1 string to UTF-8
Description
string
utf8_encode ( string data )
This function encodes the string data to
UTF-8, and returns the encoded version.
UTF-8 is a standard mechanism used by
Unicode for encoding wide
character values into a byte stream.
UTF-8 is transparent to plain ASCII
characters, is self-synchronized (meaning it is possible for a program to
figure out where in the bytestream characters start) and can be used with
normal string comparison functions for sorting and such.PHP encodes
UTF-8 characters in up to four bytes, like this:
Table 1. UTF-8 encoding
| bytes | bits | representation |
|---|
| 1 | 7 | 0bbbbbbb |
| 2 | 11 | 110bbbbb 10bbbbbb |
| 3 | 16 | 1110bbbb 10bbbbbb 10bbbbbb |
| 4 | 21 | 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb |
Each
b represents a bit that can be
used to store character data.
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