mb_strcut

(PHP 4 >= 4.0.6, PHP 5)

mb_strcut — Get part of string

설명

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.

인수

str: The string being cut.
start: The position that begins the cut.
length: The string being decoded.
encoding: encoding 인수는 문자 인코딩입니다. 생략하면, 내부 문자 인코딩값을 사용합니다.

반환값

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

참고

mb_substr() - Get part of string
mb_internal_encoding() - Set/Get internal character encoding

mb_strimwidth

mb_split

Last updated: Fri, 24 Jul 2009

add a note User Contributed Notes
mb_strcut

egoalesum at IHATEBOTS dot youarchive dot it
21-May-2009 04:07


I found this function to be extremely useful.



Here is a practical example, showing the difference between substr(), mb_substr() and mb_strcut():



<?php

mb_internal_encoding('UTF-8');

$string = 'cioèòà';

var_dump(

substr($string, 0, 6),

mb_substr($string, 0, 6),

mb_strcut($string, 0, 6)

);

?>



Output:

string(6) "cioè?"

string(9) "cioèòà"

string(5) "cioè"



Explanation:

$string is long 9 bytes

c - 1 byte

i - 1 byte

o - 1 byte

è - 2 bytes

ò - 2 bytes

à - 2 bytes



substr() works with bytes, so it returns a string which is exactly 6 bytes long. Thus, it truncates the ò character.

mb_substr(), instead, works with characters, so it returns a string which is exactly 6 characters long (but in this case is 9 bytes long).

mb_strcut() works exactly as substr(), but, if the last byte appears to be truncated, it simply omits the character.



When you use

$string = mb_strcut($string, 6);

you can know for sure that strlen($string) <= 6. But no unicode characters will be truncated.



I hope my comment could finally be a simple explanation.

t dot starling at physics dot unimelb dot edu dot au
27-Aug-2004 11:01


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.

oyag02 at yahoo dot co dot jp
26-Sep-2003 10:53


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

add a note

mb_strimwidth

mb_split

Last updated: Fri, 24 Jul 2009