if( !function_exists('mb_str_split')){
function mb_str_split( $string = '', $length = 1 , $encoding = null ){
if(!empty($string)){
$split = array();
$mb_strlen = mb_strlen($string,$encoding);
for($pi = 0; $pi < $mb_strlen; $pi += $length){
$substr = mb_substr($string, $pi,$length,$encoding);
if( !empty($substr)){
$split[] = $substr;
}
}
}
return $split;
}
}
mb_str_split
(PHP 7 >= 7.4.0, PHP 8)
mb_str_split — Given a multibyte string, return an array of its characters
Description
This function will return an array of strings, it is a version of str_split() with support for encodings of variable character size as well as fixed-size encodings of 1,2 or 4 byte characters.
If the length parameter is specified, the string is broken down into chunks of the specified length in characters (not bytes).
The encoding parameter can be optionally specified and it is good practice to do so.
Parameters
-
string -
The string to split into characters or chunks.
-
length -
If specified, each element of the returned array will be composed of multiple characters instead of a single character.
-
encoding -
The
encodingparameter is the character encoding. If it is omitted ornull, the internal character encoding value will be used.A string specifying one of the supported encodings.
Return Values
mb_str_split() returns an array of strings.
Changelog
| Version | Description |
|---|---|
| 8.0.0 |
encoding is nullable now.
|
| 8.0.0 |
This function no longer returns false on failure.
|
add a note
User Contributed Notes 3 notes
webmaster at redinfo dot co dot kr ¶
2 years ago
info at ensostudio dot ru ¶
4 years ago
Note: function return NULL if can't convert argument type.
Polyfill PHP < 7.4 based on package "symfony/polyfill-mbstring":
<?php
function mb_str_split($string, $split_length = 1, $encoding = null)
{
if (null !== $string && !\is_scalar($string) && !(\is_object($string) && \method_exists($string, '__toString'))) {
trigger_error('mb_str_split(): expects parameter 1 to be string, '.\gettype($string).' given', E_USER_WARNING);
return null;
}
if (null !== $split_length && !\is_bool($split_length) && !\is_numeric($split_length)) {
trigger_error('mb_str_split(): expects parameter 2 to be int, '.\gettype($split_length).' given', E_USER_WARNING);
return null;
}
$split_length = (int) $split_length;
if (1 > $split_length) {
trigger_error('mb_str_split(): The length of each segment must be greater than zero', E_USER_WARNING);
return false;
}
if (null === $encoding) {
$encoding = mb_internal_encoding();
} else {
$encoding = (string) $encoding;
}
if (! in_array($encoding, mb_list_encodings(), true)) {
static $aliases;
if ($aliases === null) {
$aliases = [];
foreach (mb_list_encodings() as $encoding) {
$encoding_aliases = mb_encoding_aliases($encoding);
if ($encoding_aliases) {
foreach ($encoding_aliases as $alias) {
$aliases[] = $alias;
}
}
}
}
if (! in_array($encoding, $aliases, true)) {
trigger_error('mb_str_split(): Unknown encoding "'.$encoding.'"', E_USER_WARNING);
return null;
}
}
$result = [];
$length = mb_strlen($string, $encoding);
for ($i = 0; $i < $length; $i += $split_length) {
$result[] = mb_substr($string, $i, $split_length, $encoding);
}
return $result;
}
?>
vovan-ve at yandex dot ru ¶
4 years ago
Lazy polyfill for UTF-8 only:
function utf8_str_split(string $input, int $splitLength = 1)
{
$re = \sprintf('/\\G.{1,%d}+/us', $splitLength);
\preg_match_all($re, $input, $m);
return $m[0];
}
