chunk_split

描述

string chunk_split ( string body [, int chunklen [, string end]] )

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（默认为 76）个字符后边插入 end（默认为“\r\n”）。此函数会返回新的字符串，而不会修改原有字符串。
例子 1. chunk_split() 示例
<?php // 使用 RFC 2045 语义格式化 $data $new_string = chunk_split(base64_encode($data)); ?>

参见 str_split()、explode()、split()、wordwrap() 和 RFC 2045。

add a note User Contributed Notes

xamine at gmail dot com
05-Jun-2006 02:06


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.



?>

kevin @t hyguard,com
04-Oct-2005 10:08


Not quite completely obvious, but... 



you can un_chunk_split() by:



$long_str = str_replace( "\r\n", "", $chunked_str );

harish at thespitbox dot net
30-Jul-2005 08:45


another way to group thousands in a number, which is much simpler, is built into PHP :)



www.php.net/number_format

adrian at zhp dot inet dot pl
09-Jul-2005 05:28


If you need to output number formated with thousand's separator, just use it:



$number = strrev(chunk_split (strrev($number), 3,' '));



If $number is '1234567', result is '1 234 567'.

Kevin
26-Jun-2005 07:10


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;

}

?>

Chris
16-Jun-2005 05:18


@phpkid:



You can avoid such long complex code and just use some CSS stuff.



Just add style="table-layout:fixed" in your <td > tag and your problem will be solved.



ciao

phpkid
29-May-2005 01:47


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;

}

mv@NOSPAM
24-Jan-2004 11:39


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


?>

Danilo
11-Dec-2003 06:51


>> 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

sbarnum at pointsystems dot com
21-Apr-2001 10:46


[Editor's note: You can always use wordwrap('FF99FF', 2, ':', 2); to avoid this]





chunk_split will also add the break _after_ the last occurence.  So, attempting to split a color into base components,


chunk_split('FF99FF', 2, ':');


will return FF:99:FF:

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