Code for word wrap

If a word is too long to squeeze into the available space, it'll hyphenate it as needed so it fits the container. This operates recursively, so ridiculously long words or names (e.g., URLs or this guy's signature - http://en.wikipedia.org/wiki/Wolfe+585,_Senior) will still keep getting broken off after they've passed the fourth or fifth lines, or whatever.

<?php/**
     * Wraps a string to a given number of pixels.
     *
     * This function operates in a similar fashion as PHP's native wordwrap function; however,
     * it calculates wrapping based on font and point-size, rather than character count. This
     * can generate more even wrapping for sentences with a consider number of thin characters.
     *
     * @static $mult;
     * @param string $text - Input string.
     * @param float $width - Width, in pixels, of the text's wrapping area.
     * @param float $size - Size of the font, expressed in pixels.
     * @param string $font - Path to the typeface to measure the text with.
     * @return string The original string with line-breaks manually inserted at detected wrapping points.
     */
    function pixel_word_wrap($text, $width, $size, $font){#    Passed a blank value? Bail early.
        if(!$text) return $text;#    Check if imagettfbbox is expecting font-size to be declared in points or pixels.
        static $mult;
        $mult    =    $mult ?: version_compare(GD_VERSION, '2.0', '>=') ? .75 : 1;#    Text already fits the designated space without wrapping.
        $box    =    imagettfbbox($size * $mult, 0, $font, $text);
        if($box[2] - $box[0] / $mult < $width)    return $text;#    Start measuring each line of our input and inject line-breaks when overflow's detected.
        $output        =    '';
        $length        =    0;$words        =    preg_split('/b(?=S)|(?=s)/', $text);
        $word_count    =    count($words);
        for($i = 0; $i < $word_count; ++$i){#    Newline
            if(PHP_EOL === $words[$i])
                $length    =    0;#    Strip any leading tabs.
            if(!$length) $words[$i]    =    preg_replace('/^t+/', '', $words[$i]);$box    =    imagettfbbox($size * $mult, 0, $font, $words[$i]);
            $m        =    $box[2] - $box[0] / $mult;#    This is one honkin' long word, so try to hyphenate it.
            if(($diff = $width - $m) <= 0){
                $diff    =    abs($diff);#    Figure out which end of the word to start measuring from. Saves a few extra cycles in an already heavy-duty function.
                if($diff - $width <= 0)    for($s = strlen($words[$i]); $s; --$s){
                    $box    =    imagettfbbox($size * $mult, 0, $font, substr($words[$i], 0, $s) . '-');
                    if($width > ($box[2] - $box[0] / $mult) + $size){
                        $breakpoint    =    $s;
                        break;
                    }
                }

                else{

$word_length    =    strlen($words[$i]);
                    for($s = 0; $s < $word_length; ++$s){
                        $box    =    imagettfbbox($size * $mult, 0, $font, substr($words[$i], 0, $s+1) . '-');
                        if($width < ($box[2] - $box[0] / $mult) + $size){
                            $breakpoint    =    $s;
                            break;
                        }
                    }
                }

                if(

$breakpoint){
                    $w_l    =    substr($words[$i], 0, $s+1) . '-';
                    $w_r    =    substr($words[$i],     $s+1);$words[$i]    =    $w_l;
                    array_splice($words, $i+1, 0, $w_r);
                    ++$word_count;
                    $box    =    imagettfbbox($size * $mult, 0, $font, $w_l);
                    $m        =    $box[2] - $box[0] / $mult;
                }
            }#    If there's no more room on the current line to fit the next word, start a new line.
            if($length > 0 && $length + $m >= $width){
                $output    .=    PHP_EOL;
                $length    =    0;#    If the current word is just a space, don't bother. Skip (saves a weird-looking gap in the text).
                if(' ' === $words[$i]) continue;
            }#    Write another word and increase the total length of the current line.
            $output    .=    $words[$i];
            $length +=    $m;
        }

        return

$output;
    };?>

<?php
function utf8_wordwrap($string, $width=75, $break="n", $cut=false)
{
  if($cut) {
    // Match anything 1 to $width chars long followed by whitespace or EOS,
    // otherwise match anything $width chars long
    $search = '/(.{1,'.$width.'})(?:s|$)|(.{'.$width.'})/uS';
    $replace = '$1$2'.$break;
  } else {
    // Anchor the beginning of the pattern with a lookahead
    // to avoid crazy backtracking when words are longer than $width
    $pattern = '/(?=s)(.{1,'.$width.'})(?:s|$)/uS';
    $replace = '$1'.$break;
  }
  return preg_replace($search, $replace, $string);
}
?>
Of course don't forget to use preg_quote on the $width and $break parameters if they come from untrusted input.

<?php

    function textWrap($text) {

        $new_text = '';

        $text_1 = explode('>',$text);

        $sizeof = sizeof($text_1);

        for ($i=0; $i<$sizeof; ++$i) {

            $text_2 = explode('<',$text_1[$i]);

            if (!empty($text_2[0])) {

                $new_text .= preg_replace('#([^nr .]{25})#i', '\1  ', $text_2[0]);

            }

            if (!empty($text_2[1])) {

                $new_text .= '<' . $text_2[1] . '>';   

            }

        }

        return $new_text;

    }

?>

<?php
function utf8_wordwrap($string, $width=75, $break="n", $cut=false)
{
  if($cut) {
    // Match anything 1 to $width chars long followed by whitespace,
    // otherwise match anything $width chars long
    $search= '/(.{1,'.$width.'})(?:s)|(.{'.$width.'})(?!$)/uS';
    $replace = '$1$2'.$break;
  } else {
    // Anchor the beginning of the pattern with a lookbehind
    // to avoid crazy backtracking when words are longer than $width
    $search= '/(?<=s|^)(.{1,'.$width.'}S*)(?:s)/uS';
    $replace = '$1'.$break;
  }
  return preg_replace($search, $replace, $string);
}
?>

To work around it I use this:

<?php
function linewrap($string, $width, $break, $cut) {
  $array = explode("n", $string);
  $string = "";
  foreach($array as $key => $val) {
   $string .= wordwrap($val, $width, $break, $cut);
   $string .= "n";
  }
  return $string;
}
?>

I then use linewrap() instead of wordwrap()

hope this helps someone

<?php

$a

= "some text that must wrap nice";$a = wordwrap($a, 9);

echo

$a;//  some text
//  that must
//  wrap nice$a = wordwrap($a, 9);

echo

$a;//  some text
//  that
//  must
//  wrap
//  nice?>

Subsequent uses of wordwrap() on already wrapped text will take the end-of-line characters into account when working out line length, thus reading each line that just fit nicely the first time around as being one character too long the second. This can be a problem when preparing a text email that contains (eg.) a forwarded email which has already been word-wrapped.

Solutions below which explode() the text on end-of-lines and wordwrap() the resulting strings separately take care of this nicely.

<?php

function processtext($text,$nr=10)

    {

        $mytext=explode(" ",trim($text));

        $newtext=array();

        foreach($mytext as $k=>$txt)

        {

            if (strlen($txt)>$nr)

            {

                $txt=wordwrap($txt, $nr, "-", 1);

            }

            $newtext[]=$txt;

        }

        return implode(" ",$newtext);

    }

?>

<?phpfunction mb_wordwrap_array($string, $width)
{
    if (($len = mb_strlen($string, 'UTF-8')) <= $width)
    {
        return array($string);
    }$return = array();
    $last_space = FALSE;
    $i = 0;

    do
    {
        if (

mb_substr($string, $i, 1, 'UTF-8') == ' ')
        {
            $last_space = $i;
        }

        if (

$i > $width)
        {
            $last_space = ($last_space == 0) ? $width : $last_space;$return[] = trim(mb_substr($string, 0, $last_space, 'UTF-8'));
            $string = mb_substr($string, $last_space, $len, 'UTF-8');
            $len = mb_strlen($string, 'UTF-8');
            $i = 0;
        }$i++;
    }
    while ($i < $len);$return[] = trim($string);

    return

$return;
}?>

Apparently what this piece of code does is: it takes the entered text and looks for words longer than the defined ‘$chunk_length’ if it finds any, it splits the long words and then it concatenates the whole string back to a new string with longer words separated by a dash character in this case.

After it has accomplished this task it then inserts an HTML line break after a specified ‘$line_length’ (Depending on your containers width requirements)

<?php//Start function explode_ wrap
function explode_wrap($text, $chunk_length, $line_length){//Explode all the words separated by spaces in a string
$string_chunks = explode(' ', $text);// Get each split word from the array $sring_chunks_array => key => value
foreach ($string_chunks as $chunk => $value) {

if(

strlen($value) >= $chunk_length){//Split the chunks/words which are longer than $chunk_length
$new_string_chunks[$chunk] = chunk_split($value, $chunk_length, ' - ');

}else {

//Do not split the normal length words
$new_string_chunks[$chunk] = $value;

}

}

//End foreach loop

//Concatenate back the all the words

$new_text=implode(' ', $new_string_chunks);

return

wordwrap($new_text, $line_length, '<br />');

}

//End function?>

My old sheep word wrap function (posted at the bottom of this page, is kinda old dated and this one is faster and more accurate).

<?php

//the width of the biggest char @

$fontwidth = 11;
//each chargroup has char-ords that have the same proportional displaying width

$chargroup[0] = array(64);

$chargroup[1] = array(37,87,119);

$chargroup[2] = array(65,71,77,79,81,86,89,109);

$chargroup[3] = array(38,66,67,68,72,75,78,82,83,85,88,90);

$chargroup[4] = array(35,36,43,48,49,50,51,52,53,54,55,56,57,60,61,62,63, 69,70,76,80,84,95,97,98,99,100,101,103,104,110,111,112, 113,115,117,118,120,121,122,126);

$chargroup[5] = array(74,94,107);

$chargroup[6] = array(34,40,41,42,45,96,102,114,123,125);

$chargroup[7] = array(44,46,47,58,59,91,92,93,116);

$chargroup[8] = array(33,39,73,105,106,108,124);
//how the displaying width are compared to the biggest char width

$chargroup_relwidth[0] = 1; //is char @

$chargroup_relwidth[1] = 0.909413854;

$chargroup_relwidth[2] = 0.728241563;

$chargroup_relwidth[3] = 0.637655417;

$chargroup_relwidth[4] = 0.547069272;

$chargroup_relwidth[5] = 0.456483126;

$chargroup_relwidth[6] = 0.36589698;

$chargroup_relwidth[7] = 0.275310835;

$chargroup_relwidth[8] = 0.184724689;
//build fast array

$char_relwidth = null;

for ($i=0;$i<count($chargroup);$i++){

    for ($j=0;$j<count($chargroup[$i]);$j++){

        $char_relwidth[$chargroup[$i][$j]] = $chargroup_relwidth[$i];

    }

}
//get the display width (in pixels) of a string

function get_str_width($str){

    global $fontwidth,$char_relwidth;

    $result = 0;

    for ($i=0;$i<strlen($str);$i++){

        $result += $char_relwidth[ord($str[$i])];

    }

    $result = $result * $fontwidth;

    return $result;   

}
//truncates a string at a certain displaying pixel width

function truncate_str_at_width($str, $width, $trunstr='...'){

    global $fontwidth,$char_relwidth;       

    $trunstr_width = get_str_width($trunstr);

    $width -= $trunstr_width;

    $width = $width/$fontwidth;

    $w = 0;

    for ($i=0;$i<strlen($str);$i++){

        $w += $char_relwidth[ord($str[$i])];

        if ($w > $width)

            break;   

    }

    $result = substr($str,0,$i).$trunstr;

    return $result;

    // texas is the reason rules at 10am :)

}

?>

<?php

function myWordWrap ($string, $length=3, $wrap=',', $from='left') {

    if ($from=='left') $txt=wordwrap($string, $length, $wrap, true);

    if ($from=='right') {

        // string to array

        $arr_l=array();

        for ($a=0;strlen($string)>$a;$a++) $arr_l[$a]=$string{$a};

        // reverse array

        $arr_r=array_reverse($arr_l);

        // array to string

        $string_r='';

        foreach ($arr_r as $arr_line => $arr) $string_r.=$arr;

        // add wrap to reverse string

        $string_r=wordwrap($string_r, $length, $wrap, true);

        // reverse string to array

        $arr_r=array();

        for ($a=0;strlen($string_r)>$a;$a++) $arr_r[]=$string_r{$a};

        // reverse array again

        $arr_l=array_reverse($arr_r);

        // string with wrap

        $txt='';

        foreach ($arr_l as $arr_line => $arr) $txt.=$arr;

        }

    return $txt;

    }

?>

<?php
function bb2html($bb) {
        $words= explode(' ', $bb); // string to array
    foreach ($words as $word) {
        $break = 0;
        for ($i = 0; $i < strlen($word); $i++) {
            if ($break >= 40) {
                $word= wordwrap($word, 40, '-<br>', true); //add <br> every 40 chars
                $break = 0;
            }
            $break++;

        }

$newText[] = $word; //add word to array
    }
    $bb = implode(' ', $newText); //array to string
    return $bb;
}
?>

Testing out your function, I can confirm that it works, and it works very well.

However, others that intend to use your function need to be aware that if they use it in conjunction with unverified data (such as raw user input from $_POST, $_GET, etcetera), they are creating potential attack vectors that can be exploited by hackers via script requests containing malicious code. This is because your function is using the preg_replace function in conjunction with the "e" flag (in order to allow the chunk_split bit to execute), which can allow execution of arbitrary code.

Solution: If there is any possibility that $str may contain unverified data (such as raw user input), ensure that the contents of $str is sanitized (such as by using htmlentities/htmlspecialchars/etc) prior to sending it to wrap($str,...).

Not a criticism; I intend to use your function, because I like it. However, just posting this as a note to other users that may not be aware of the importance of data sanitation.

<?php
function mb_wordwrap($string, $limit)
{
    $string = strip_tags($string); //Strip HTML tags off the text
    $string = html_entity_decode($string); //Convert HTML special chars into normal text
    $string = str_replace(array("r", "n"), "", $string); //Also cut line breaks
    if(mb_strlen($string, "UTF-8") <= $limit) return $string; //If input string's length is no more than cut length, return untouched
    $last_space = mb_strrpos(mb_substr($string, 0, $limit, "UTF-8"), " ", 0, "UTF-8"); //Find the last space symbol positionreturn mb_substr($string, 0, $last_space, "UTF-8").' ...'; //Return the string's length substracted till the last space and add three points
}
?>

The function simply searches the last space symbol in the range and returns the string cut till that position. No iterations, no regular expressions and no buffer overload. Tested with large Russian texts and works perfectly.

public static function myWordWrap ($string, $length=3, $wrap=',', $from='left') {
        if ($from=='left') $txt=wordwrap($string, $length, $wrap, true);
            if ($from=='right') {
                $m = strlen($string)%$length;
                if ($m < strlen($string))
                    $txt = substr($string,0,$m).$wrap.wordwrap(substr($string,$m),$length, $wrap, true);
                else
                    $txt = $string;
            }

            return $txt;
       }

/Applications/MAMP/bin/php5/bin/php --version
PHP 5.1.6 (cli) (built: Sep  8 2006 10:25:04)

/Applications/MAMP/bin/php5/bin/php -r 'echo wordwrap("In aller Freundschaft (50)_UT", 20) . "n";'
In aller
Freundschaft
(50)_UT

php --version
PHP 5.2.5 (cli) (built: Feb 20 2008 12:30:47)

php -r 'echo wordwrap("In aller Freundschaft (50)_UT", 20) . "n";'
In aller
Freundschaft (50)_UT

<?php
    $linebreak = '<br/>' . PHP_EOL;
    $width = 5;
    $standardized = preg_replace('/r?n/',$linebreak, "abc abc abcnabc abc abcrnabc abc abc");
    echo 'Standardized EOL:', PHP_EOL, $standardized, PHP_EOL, PHP_EOL; // PHP_EOL for the command line, use '<br/>' for HTML.
    echo "Wrapped at $width:", PHP_EOL, wordwrap( $standardized, 7, $linebreak), PHP_EOL;
?>

$ php -f test.php
Standardized EOL:
abc abc abc<br/>
abc abc abc<br/>
abc abc abc

Wrapped at 5:
abc abc<br/>
abc<br/>
abc abc<br/>
abc<br/>
abc abc<br/>
abc

If you specify the $break parameter, then *that string defines what the function considers a "newline"*.

Consider the following string:

$str = "Rumplestiltskin Schwartzmenikoff
1534 Gingerbread Lane
Black Forest, Germany";

You are trying to fit this address into a space that only allows for 22 characters, but you want it clear that you're continuing a previous line, so you want a space added. You might try this:

$str = wordwrap($str, 22, "n>");

If you did that, you would end up with the following output:

"Rumplestiltskin
>Schwartzmenikoff
1534
>Gingerbread Lane
Black
>Forest, Germany"

This is because when you pass it a third parameter of "n>", it assumes that entire string is a newline character. It's no longer using "n". In your output, of course, n is still a newline, so it appears to have extra lines.

If you're looking to wordwrap a multi-line string with something besides a newline character, make sure all existing linebreaks are already delineated with the string you pass to wordwrap().

<?php
$break = strpos( $content, "r" ) === false ? "n" : "rn";
$content = wordwrap( $content, 78, $break );
?>

I also tend to normalize multi-line strings (if my OCD is acting up).  You would typically perform this conversion _before_ sending it off to wordwrap().

<?php
//quick and simple, but clobbers old-style Mac line-endings
$content = str_replace( "r", '', $content );//slower, but works with everything
$content = preg_replace( "/(rn|r)/", "n", $content );//now, wordwrap() will behave exactly as expected
$content = wordwrap( $content, 78, "n" );
?>

To preserve the spaces and still achieve a consistent cut length, you need to replace spaces with a suitable one-character replacement. I chose the ASCII non-printing character SUB (ASCII #26; some old telephone code meaning substitute):

<?php
$regex= str_replace(' ', chr(26), $regex);
$regex= wordwrap($regex, 80, '<br />', TRUE);
$regex= str_replace(chr(26), ' ', $regex);
?>

(Of course, you need to replace 80 with your column length and '<br />' with your break string)

Hope it can be useful for you :-)
<?php
function htmlwrap(&$str, $maxLength, $char='<br />'){
    $count = 0;
    $newStr = '';
    $openTag = false;
    $lenstr = strlen($str);
    for($i=0; $i<$lenstr; $i++){
        $newStr .= $str{$i};
        if($str{$i} == '<'){
            $openTag = true;
            continue;
        }
        if(($openTag) && ($str{$i} == '>')){
            $openTag = false;
            continue;
        }
        if(!$openTag){
            if($str{$i} == ' '){
                if ($count == 0) {
                    $newStr = substr($newStr,0, -1);
                    continue;
                } else {
                    $lastspace = $count + 1;
                }
            }
            $count++;
            if($count==$maxLength){
                if ($str{$i+1} != ' ' && $lastspace && ($lastspace < $count)) {
                    $tmp = ($count - $lastspace)* -1;
                    $newStr = substr($newStr,0, $tmp) . $char . substr($newStr,$tmp);
                    $count = $tmp * -1;
                } else {
                    $newStr .= $char;
                    $count = 0;
                }
                $lastspace = 0;
            }
        } 
    }

    return

$newStr;
}
?>

<?php
function mb_wordwrap($string, $width=75, $break="n", $cut = false) {
    if (!$cut) {
        $regexp = '#^(?:[x00-x7F]|[xC0-xFF][x80-xBF]+){'.$width.',}b#U';
    } else {
        $regexp = '#^(?:[x00-x7F]|[xC0-xFF][x80-xBF]+){'.$width.'}#';
    }
    $string_length = mb_strlen($string,'UTF-8');
    $cut_length = ceil($string_length / $width);
    $i = 1;
    $return = '';
    while ($i < $cut_length) {
        preg_match($regexp, $string,$matches);
        $new_string = $matches[0];
        $return .= $new_string.$break;
        $string = substr($string, strlen($new_string));
        $i++;
    }
    return $return.$string;
}$mb_string = "こんにちは";//Hello in Japanese
$cut_mb_string = mb_wordwrap($mb_string,1," ",true); //こ ん に ち は
print($cut_mb_string);
?>

<?php
function txtcut($string, $length) {
    $tag = false;
    $chars = 0;
    $position = 0;
    $split = str_split($string);
    foreach ($split as $char) {
        $position++;
        if ($char == "<") {
            $tag = true;
            continue;
        }
        if ($char == ">") {
            $tag = false;
            continue;
        }
        if ($tag == true) {
            continue;
        }
        $chars++;
        if ($chars >= $length) {
            if ($char == " " || $char == "r" || $char == "n") {
                $position--;
                break;
            }
        }
    }
    if ($position == strlen($string)) {
        return strlen($string);
    } else {
        $string = substr($string, 0, $position);
        if (substr($string, -4, 4) == "<br>") {
            $string = rtrim(substr($string, 0, -4));
        }
        return strlen($string);
    }
}
?>