Documentation PHP

grapheme_extract

(No version information available, might be only in CVS)

grapheme_extract — Function to extract a sequence of default grapheme clusters from a text buffer, which must be encoded in UTF-8.

Description

Procedural style

string grapheme_extract ( string $haystack , int $size [, int $start ] )

Function to extract a sequence of default grapheme clusters from a text buffer, which must be encoded in UTF-8.

Liste de paramètres

haystack

String to search.

size

Maximum number items - based on the $extract_type - to return.

extract_type

Defines the type of units referred to by the $size parameter:

  • GRAPHEME_EXTR_COUNT (default) - $size is the number of default grapheme clusters to extract.
  • GRAPHEME_EXTR_MAXBYTES - $size is the maximum number of bytes returned.
  • GRAPHEME_EXTR_MAXCHARS - $size is the maximum number of UTF-8 characters returned.

start

Starting position in $haystack in bytes - if given, it must be zero or a positive value that is less than or equal to the length of $haystack in bytes. The default is zero. If $start does not point to the first byte of a UTF-8 character, the start position is moved to the next character boundary.

Valeurs de retour

A string starting at offset $start and ending on a default grapheme cluster boundary that conforms to the $size and $extract_type specified.

Exemples

Exemple #1 grapheme_extract() 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_extract( $char_a_ring_nfd . $char_o_diaeresis_nfd, 1, GRAPHEME_EXTR_COUNT, 2));

?>

L'exemple ci-dessus va afficher :

         
o%CC%88


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