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Dokumen ini menggunakan Manual laman web PHP Cina Lepaskan
(PHP 4, PHP 5)
chunk_split — 将字符串分割成小块
$body
[, int $chunklen
= 76
[, string $end
= "\r\n"
]] )
使用此函数将字符串分割成小块非常有用。例如将
base64_encode() 的输出转换成符合 RFC 2045 语义的字符串。它会在每
chunklen
个字符后边插入
end
。
body
要分割的字符。
chunklen
分割的尺寸。
end
行尾序列符号。
返回分割后的字符。
Example #1 chunk_split() 例子
<?php
// 使用 RFC 2045 语义格式化 $data
$new_string = chunk_split ( base64_encode ( $data ));
?>
[#1] Anonymous [2014-02-19 13:57:12]
Important note is the maximum line length and the recommended one. The standard says:
"Lines in a message MUST be a maximum of 998 characters excluding the CRLF, but it is RECOMMENDED that lines be limited to 78 characters excluding the CRLF. "
See PHP manual for chunk_split() Which is set to 76 characters long chunk and "\r\n" at the end of line by default.
[#2] qeremy [atta] gmail [dotta] com [2012-02-28 15:35:26]
An alternative for unicode strings;
<?php
function chunk_split_unicode($str, $l = 76, $e = "\r\n") {
$tmp = array_chunk(
preg_split("//u", $str, -1, PREG_SPLIT_NO_EMPTY), $l);
$str = "";
foreach ($tmp as $t) {
$str .= join("", $t) . $e;
}
return $str;
}
$str = "Yar?m kilo ?ay, yar?m kilo ?eker";
echo chunk_split($str, 4) ."\n";
echo chunk_split_unicode($str, 4);
?>
Yar?
?m k
ilo
?ay
, ya
r?m
kil
o ?
eker
Yar?
m ki
lo ?
ay,
yar?
m ki
lo ?
eker
[#3] belal dot nabeh at gmail dot com [2010-08-10 08:02:45]
If you are using UTF-8 charset you will face a problem with Arabic language
to solve this problem i used this function
<?php
function chunk_split_($text,$length,$string_end)
{
$text = iconv("UTF-8","windows-1256",$text);
$text = str_split($text);
foreach($text as $val)
{
if($a !== $val)
{
$a = $val;
$x = 0;
}else{
$a = $val;
$x++;
}
if($x > $length)
{
$new_text .= $val.$string_end;
$x = 0;
}else
{
$new_text .= $val;
}
}
$new_text = iconv("windows-1256","UTF-8",$new_text);
return $new_text;
}
?>
[#4] Peter from dezzignz.com [2010-04-05 04:30:57]
chunk_split() is not multibyte safe. If you ever run into needing the function that is multibyte safe, here you go:
<?php
function mbStringToArray ($str) {
if (empty($str)) return false;
$len = mb_strlen($str);
$array = array();
for ($i = 0; $i < $len; $i++) {
$array[] = mb_substr($str, $i, 1);
}
return $array;
}
function mb_chunk_split($str, $len, $glue) {
if (empty($str)) return false;
$array = mbStringToArray ($str);
$n = 0;
$new = '';
foreach ($array as $char) {
if ($n < $len) $new .= $char;
elseif ($n == $len) {
$new .= $glue . $char;
$n = 0;
}
$n++;
}
return $new;
}
?>
[#5] dampee at earthlink dot net [2009-11-20 09:10:11]
I've found this quite useful for simulating various kinds of shuffles with cards. It is humorous but can imitate multiple deck cuts and other (imperfectly) random events.
<?php
function truffle_shuffle($body, $chunklen = 76, $end = "\r\n")
{
$chunk = chunk_split($body, $chunklen, "-=blender=-");
$truffle = explode("-=blender=-",$chunk);
$shuffle = shuffle($truffle);
$huknc = implode($end,$shuffle);
return $huknc;
}
?>
[#6] tim at weird spots in my crotch dot com [2008-05-08 02:29:38]
@Royce
I think this is better, since you can still use the ampersand in your text:
<?php
function HtmlEntitySafeSplit($html,$size,$delim)
{
$pos=0;
for($i=0;$i<strlen($html);$i++)
{
if($pos >= $size && !$unsafe)
{
$out.=$delim;
$unsafe=0;
$pos=0;
}
$c=substr($html,$i,1);
if($c == "&")
$unsafe=1;
elseif($c == ";")
$unsafe=0;
elseif($c == " ")
$unsafe=0;
$out.=$c;
$pos++;
}
return $out;
}
?>
[#7] neos at blizzz dot ru [2008-05-03 11:38:46]
"version" of chunk_split for cyrillic characters in UTF-8
public function UTFChunk($Text,$Len = 10,$End = "\r\n")
{
if(mb_detect_encoding($Text) == "UTF-8")
{
return mb_convert_encoding(
chunk_split(
mb_convert_encoding($Text, "KOI8-R","UTF-8"), $Len,$End
),
"UTF-8", "KOI8-R"
);
} else
{
return chunk_split($Text,$Len,$End);
}
}
this is example for russian language
[#8] Royce [2008-04-16 00:31:19]
Here's a version of Chunk Split I wrote that will not split html entities. Useful if you need to inject something in html (in my case, <wbr/> tags to allow for long text wrapping).
<?php
function HtmlEntitySafeSplit($html,$size,$delim)
{
$pos=0;
for($i=0;$i<strlen($html);$i++)
{
if($pos >= $size && !$unsafe)
{
$out.=$delim;
$unsafe=0;
$pos=0;
}
$c=substr($html,$i,1);
if($c == "&")
$unsafe=1;
elseif($c == ";")
$unsafe=0;
$out.=$c;
$pos++;
}
return $out;
}
?>
[#9] mark [at] d0gz [dot] net [2007-04-10 22:12:28]
When using ssmtp for simple command line mailing:
$mail_to = "destination@emailbox.com";
$msg = "this would be an actual base64_encoded gzip msg";
$date = date(r);
$mail = "X-FROM: root@sender.org \n";
$mail .= "X-TO: ".$mail_to. " \n";
$mail .= "To: ".$mail_to. " \n";
$mail .= "Date: $date \n";
$mail .= "From: root@sender.org \n";
$mail .= "Subject: lifecheck \n";
$mail .= $msg." \n";
exec("echo '$mail' | /usr/sbin/ssmtp ".$mail_to);
be sure to invoke chunk_split() on your message body - ssmtp becomes unhappy with long lines and will subsequently trash your message.
[#10] hansvane at yahoo dot com dot ar [2007-01-21 22:06:24]
This function is very simple and many other functions make this on PHP 5 and even some ones in 4 the good think about this one is that work on php 3.0.6 and 4
function split_hjms_chars($xstr, $xlenint, $xlaststr)
{
$texttoshow = chunk_split($xstr,$xlenint,"\r\n");
$texttoshow = split("\r\n",$texttoshow);
$texttoshow = $texttoshow[0].$xlaststr;
return $texttoshow;
}
// For use
echo split_hjms_chars("This is your text",6,"...");
// Will return
This i...
It is useful to cut long text on preview lists and if the server it's old.
Hope it helps some one. Hans Svane
[#11] chris AT w3style.co DOT uk [2006-08-14 12:32:05]
I'm not sure what versions this also occurs in but the output of chunk_split() in PHP 5.0.4 does not match the output in other versions of PHP.
In all versions of PHP I have used, apart from 5.0.4 chunk_split() adds the separator (\r\n) to the end of the string. But in PHP 5.0.4 this does not happen. This had a fairly serious impact on a library I maintain so it may also affect others who are not aware of this.
[#12] xamine at gmail dot com [2006-06-04 11:06:00]
In reply to "adrian at zhp dot inet dot pl" digit grouping function:
<?php
$number = strrev(chunk_split (strrev($number), 3,' '));
//If $number is '1234567', result is '1 234 567'.
?>
There is a much more simple way of doing this, by using the built-in number_format() function.
<?php
$number = number_format($number,2,"."," ");
//This will round $number to 2 decimals, use the dot (".")
//as decimal point, and the space (" ") as thousand sepparator.
?>
[#13] kevin @t hyguard,com [2005-10-03 19:08:17]
Not quite completely obvious, but...
you can un_chunk_split() by:
$long_str = str_replace( "\r\n", "", $chunked_str );
[#14] harish at thespitbox dot net [2005-07-30 05:45:56]
another way to group thousands in a number, which is much simpler, is built into PHP :)
www.php.net/number_format
[#15] Kevin [2005-06-25 16:10:34]
To phpkid:
This is a much simpler solution.
<?php
function longWordWrap($string) {
$string = str_replace("\n", "\n ", $string); // add a space after newline characters, so that 2 words only seperated by \n are not considered as 1 word
$words = explode(" ", $string); // now split by space
foreach ($words as $word) {
$outstring .= chunk_split($word, 12, " ") . " ";
}
return $outstring;
}
?>
[#16] phpkid [2005-05-28 10:47:06]
Well I have been having issues with a shoutbox I am coding it would keep expanding the <TD> if there were large words in it but I fixed it with this:
function PadString($String){
$Exploded = explode(" ", $String);
$Max_Parts = count($Exploded);
$CurArray = 0;
$OutString = '';
while($CurArray<=$Max_Parts)
{
$Peice_Size = strlen($Exploded[$CurArray]);
if($Peice_Size>15)
{
$OutString .= chunk_split($Exploded[$CurArray], 12, " ");
$CurArray++;
} else {
$OutString .= " ".$Exploded[$CurArray];
$CurArray++;
}
}
return $OutString;
}
[#17] mv@NOSPAM [2004-01-24 07:39:25]
the best way to solve the problem with the last string added by chunk_split() is:
<?php
$string = '1234';
substr(chunk_split($string, 2, ':'), 0, -1);
// will return 12:34
?>
[#18] Danilo [2003-12-10 14:51:51]
>> chunk_split will also add the break _after_ the last occurence.
this should be not the problem
substr(chunk_split('FF99FF', 2, ':'),0,8);
will return FF:99:FF