String/Text Word Wrap at a certain character. First created to wrap a long CSV list.

wordWrapAtCharacter.php

function wordWrapAtCharacter($str, $minWidth = 200, $char = ',', $lineBreak = "\n")
{
    // prev pos
    $marker = 0;
    // char pos
    $pos = false;
    if($minWidth+$marker < strlen($str))
    {
        $pos = strpos($str,$char,$minWidth+$marker);
    }
    // return string
    $ret = '';

    while($pos !== false)
    {
        // add sub string to return string
        $pos += strlen($char);
        $ret .= substr($str,$marker,($pos-$marker)).$lineBreak;
        $marker = $pos;
        // char pos
        if(($minWidth+$marker) < strlen($str))
        {
            $pos = strpos($str,$char,$minWidth+$marker);
        }
        else {
            $pos = false;
        }
    }
    // add final piece
    $ret .= substr($str,$marker).$lineBreak;

    return $ret;
}

// Test
    function test_wordWrapAtCharacter()
    {
        echo '<pre>';

        $input = '10010,10020,31000,15000,10020,10300,10200,3600,1040,1510,24810,342000,50250,10000,120825,12535,174900,65040,10010,10020,31000,15000,10020,10300,10200,3600,1040,1510,24810,342000,50250,10000,120825,12535,174900,65040,10010,10020,31000,15000,10020,10300,10200,3600,1040,1510,24810,342000,50250,10000,120825,12535,174900,65040,10010,10020,31000,15000,10020,10300,10200,3600,1040,1510,24810,342000,50250,10000,120825,12535,174900,65040,10010,10020,31000,15000,10020,10300,10200,3600,1040,1510,24810,342000,50250,10000,120825,12535,174900,65040';

        echo "\nInput: $input";

        echo "\nOutput: \n".wordWrapAtCharacter($input,80,',');

        echo "\n\n - done.";

    }