public function truncate_utf8_string($string, $length, $etc = ‘…’)
{
$result = ”;
$string = html_entity_decode(trim(strip_tags($string)), ENT_QUOTES, ‘UTF-8’);
$strlen = strlen($string);
for ($i = 0; (($i < $strlen) && ($length > 0)); $i++)
{
if ($number = strpos(str_pad(decbin(ord(substr($string, $i, 1))), 8, ‘0’, STR_PAD_LEFT), ‘0’))
{
if ($length < 1.0)
{
break;
}
$result .= substr($string, $i, $number);
$length -= 1.0;
$i += $number – 1;
}
else
{
$result .= substr($string, $i, 1);
$length -= 0.5;
}
}
$result = htmlspecialchars($result, ENT_QUOTES, ‘UTF-8’);
if ($i < $strlen)
{
$result .= $etc;
}
return $result;
}
$this->truncate_utf8_string($value[‘coursedes’],15) //带省略号
$this->truncate_utf8_string($value[‘coursedes’],15,false) //不带省略号
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