* Name: truncate
* Purpose: Truncate a string to a certain length if necessary,
* optionally splitting in the middle of a word, and
* appending the $etc string or inserting $etc into the middle.
* @link http://smarty.php.net/manual/en/language.modifier.truncate.php
* truncate (Smarty online manual)
* @author Monte Ohrt
* @param string
* @param integer
* @param string
* @param boolean
* @param boolean
* @return string
*/
function smarty_modifier_truncate(
$string,
$length = 80,
$etc = '...',
$break_words = false,
$middle = false
) {
if ($length == 0) {
return '';
}
$strlength = (function_exists('mb_strlen') ? 'mb_strlen' : 'strlen');
if ($strlength($string) > $length) {
$length -= min($length, strlen($etc));
if (function_exists('mb_substr')) {
$func = 'mb_substr';
} else {
$func = 'substr';
}
if (! $break_words && ! $middle) {
$string = preg_replace('/\s+?(\S+)?$/', '', $func($string, 0, $length + 1));
}
if (! $middle) {
return $func($string, 0, $length) . $etc;
} else {
return $func($string, 0, $length / 2) . $etc . $func($string, -$length / 2);
}
} else {
return $string;
}
}