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Описание

Procedural style

int grapheme_substr ( string $string , int $start [, int $length ] )

Return part of a string

Список параметров

string: The input string. Must be valid UTF-8.
start: Start position in default grapheme units. If $start is non-negative, the returned string will start at the $start'th position in $string, counting from zero. If $start is negative, the returned string will start at the $start'th grapheme unit from the end of string.
length: Length in grapheme units. If $length is given and is positive, the string returned will contain at most $length grapheme units beginning from $start (depending on the length of string). If $string is less than or equal to $start grapheme units long, FALSE will be returned. If $length is given and is negative, then that many grapheme units will be omitted from the end of string (after the start position has been calculated when a start is negative). If $start denotes a position beyond this truncation, an empty string will be returned.

Возвращаемые значения

Returns the extracted part of $string.

Примеры

Пример #1 grapheme_substr() example


<?php

$char_a_ring_nfd = "a\xCC\x8A";  // 'LATIN SMALL LETTER A WITH RING ABOVE' (U+00E5) normalization form "D"
$char_o_diaeresis_nfd = "o\xCC\x88"; // 'LATIN SMALL LETTER O WITH DIAERESIS' (U+00F6) normalization form "D"

print urlencode(grapheme_substr( "ao" . $char_a_ring_nfd . "bc" . $char_o_diaeresis_nfd . "O", 2, -1 ));
?>

Результат выполнения данного примера:

a%CC%8Abco%CC%88

Смотрите также

grapheme_extract() - Function to extract a sequence of default grapheme clusters from a text buffer, which must be encoded in UTF-8.
» Unicode Text Segmentation: Grapheme Cluster Boundaries