String Truncate | Milian Wolff

› Code Snippets › String Truncate

Wed, 07/19/2006 - 14:26

If you write a CMS you will have to truncate your contents to automagically create summaries. The following function will do the job:

If you write a given string (default '') inside one of your contents, the text will be truncated to that position.

Else the function looks for the nearest word boundary after at least $len characters and cuts there. Because that might be directly inside your text $append will be appended. To prevent that the markup is messed up, closetags() is called.

/**
 * if $splitter is found inside the $str, everything before $splitter will be
 * returned.
 * else truncates $str after $length chars (actually at the nearest
 * word boundary after at least $len characters). Also $append will be added to
 * $str
 *
 * @param string &$str
 * @param integer $length
 * @param optional string $hardbreak
 * @param optional string $append
 * @return string
 * @author Milian Wolff <mail@milianw.de>
 */
function truncate($str, $len = 200, $splitter = '<!--MORE-->', $append = '…') {
    if (strlen($str) <= $len) {
        return $str;
    }
    if ($len > 0 && !strstr($str, $splitter)) {
        preg_match('#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){'.$len.',}\b#U', $str, $matches);
        $str = $matches[0];
        # remove trailing opener tags and close all other open tags:
        $str = closetags(preg_replace('#\s*<[^>]+>?\s*$#', '', $str).$append);
    } else {
        $arr = explode($splitter, $str, 2);
        $str = $arr[0];
    }
    return $str;
}

Milian Wolff

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