grapheme_substr
(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0)
grapheme_substr — Return part of a string
Description
Procedural style
string grapheme_substr ( string $string , int $start [, int $length ] )Return part of a string
Parameters
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 $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, FALSE will be returned.
Return Values
Returns the extracted part of $string.
Changelog
Version | Description |
|---|---|
5.4 | If length is given and positive and the argument string is shorter than the specified length, all the rest of the string according to start parameter is returned. Previously, FALSE was returned. |
Examples
Example #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?));
?>The above example will output:
a%CC%8Abco%CC%88See Also
- grapheme_extract() - Function to extract a sequence of default grapheme clusters from a text buffer, which must be encoded in UTF-8.
← grapheme_strstr
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com
