UtfString
class UtfString implements ArrayAccess, Stringable (View source)
Implementation for UTF-8 strings.
The subscript operator in PHP, when used with string will return a byte and not a character. Because in UTF-8 strings a character may occupy more than one byte, the subscript operator may return an invalid character.
Because the lexer relies on the subscript operator this class had to be implemented.
Implements array-like access for UTF-8 strings.
In this library, this class should be used to parse UTF-8 queries.
Properties
| string | $str | The raw, multi-byte string. |
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| int | $byteIdx | The index of current byte. |
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| int | $charIdx | The index of current character. |
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| int | $byteLen | The length of the string (in bytes). |
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| int | $charLen | The length of the string (in characters). |
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| static protected array<int|string,int> | $asciiMap | A map of ASCII binary values to their ASCII code This is to improve performance and avoid calling ord($byte) |
Methods
No description
Checks if the given offset exists.
Gets the character at given offset.
Sets the value of a character.
Unsets an index.
Gets the length of an UTF-8 character.
Returns the length in characters of the string.
Returns the contained string.
Details
__construct(string $str)
No description
bool
offsetExists(int $offset)
Checks if the given offset exists.
string|null
offsetGet(int $offset)
Gets the character at given offset.
void
offsetSet(int $offset, string $value)
Sets the value of a character.
void
offsetUnset(int $offset)
Unsets an index.
static int
getCharLength(string $byte)
Gets the length of an UTF-8 character.
According to RFC 3629, a UTF-8 character can have at most 4 bytes. However, this implementation supports UTF-8 characters containing up to 6 bytes.
int
length()
Returns the length in characters of the string.
string
__toString()
Returns the contained string.