mb_strcut

(PHP 4 >= 4.0.6, PHP 5)

mb_strcut — Get part of string

Описание

string mb_strcut ( string $str , int $start [, int $length [, string $encoding ]] )

mb_strcut() performs equivalent operation as mb_substr() with different method. If start position is multi-byte character's second byte or larger, it starts from first byte of multi-byte character.

It subtracts string from str that is shorter than length AND character that is not part of multi-byte string or not being middle of shift sequence.

Список параметров

str

The string being cut.

start

The position that begins the cut.

length

The string being decoded.

encoding

The encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used.

Возвращаемые значения

mb_strcut() returns the portion of str specified by the start and length parameters.

Смотрите также

Коментарии

diffrence between mb_substr and mb_substr

example:
mb_strcut('I_ROHA', 1, 2) returns 'I_'. Treated as byte stream.
mb_substr('I_ROHA', 1, 2) returns 'ROHA' Treated as character stream.

# 'I_' 'RO' 'HA' means multi-byte character
2003-09-26 06:53:59
http://php5.kiev.ua/manual/ru/function.mb-strcut.html
What the manual and the first commenter are trying to say is that mb_strcut uses byte offsets, as opposed to mb_substr which uses character offsets. 

Both mb_strcut and mb_substr appear to treat negative and out-of-range offsets and lengths in the basically the same way as substr. An exception is that if start is too large, an empty string will be returned rather than FALSE. Testing indicates that mb_strcut first works out start and end byte offsets, then moves each offset left to the nearest character boundary.
2004-08-27 07:01:54
http://php5.kiev.ua/manual/ru/function.mb-strcut.html
Here is an example with UTF8 characters, to see how the start and length arguments are working:

  $str_utf8 = utf8_encode("Déjà_vu");
  $str_utf8_0 = mb_strcut($str_utf8, 0, 4, "UTF-8"); // Déj
  $str_utf8_1 = mb_strcut($str_utf8, 1, 4, "UTF-8"); // éj
  $str_utf8_2 = mb_strcut($str_utf8, 2, 4, "UTF-8"); // éj
  $str_utf8_3 = mb_strcut($str_utf8, 3, 4, "UTF-8"); // jà_
  $str_utf8_4 = mb_strcut($str_utf8, 4, 4, "UTF-8"); // à_v

The string includes two special charaters, "é" and "à" internally coded with two bytes.
Note that a multibyte character is removed rather than kept in half at the end of the output.
Note also that the result is the same for a cut 1,4 and a cut 2,4 with this string.
2017-11-16 16:30:21
http://php5.kiev.ua/manual/ru/function.mb-strcut.html
Автор:
This was driving me crazy, because mb_strcut() kept returning an empty string.  The $length parameter seems to have a max value of 2^32-1 (2147483647).

Works:
<?php
 
# output: Полуустав
 
echo mb_strcut('Полуустав'0pow(2,31)-1);
?>

Doesn't work:
<?php
 
# nothing is output
 
echo mb_strcut('Полуустав'0pow(2,31));
?>

My PHP_INT_MAX value is much larger than 2^32-1, so I'm not sure why larger values for $length don't work. :(

<?php
 
# output: 9223372036854775807
 
echo PHP_INT_MAX;
?>
2021-11-16 01:49:30
http://php5.kiev.ua/manual/ru/function.mb-strcut.html

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