How PHP determines the number of bytes that a word occupies
Source: Internet
Author: User
How PHP determines the number of bytes that a word occupies.
Win7 inside seems to have added some new words. The number of bytes is 4 bits.
How to determine the existence of this Chinese character in a string. Like what:
[Email protected]
@ Represents a Chinese character with byte digits 4. When I pick up the characters, [email protected]
Ask Master enlighten how to judge the existence of the first word, with JS can also
------Solution--------------------
The double-byte portion of the GB 18030 is fully GBK with the internal code system. On this basis, a four-byte extension is made, and the four-byte encoding space is sequentially: 0x81 to 0xfe,0x30 to 0x39,0x81 to 0xfe,0x30 to 0x39. A total of 1,587,600 code bits
That means you can't just judge a byte, and if the value of the second byte is in the range of 0x30 to 0x39, he's a 4-byte character.
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