/**
* Returns the character length of a string.
*
* @param string $str A multibyte or singlebyte string.
*
* @return integer The string length.
*/
function _strlen($str)
{
static $mbstring;
// Strip ANSI color codes if requested.
if ($this->_ansiColor) {
$str = $this->_ansiColor->strip($str);
}
// Cache expensive function_exists() calls.
if (!isset($mbstring)) {
$mbstring = function_exists('mb_strwidth');
}
if ($mbstring) {
return mb_strwidth($str, $this->_charset);
}
return strlen($str);
}
