Lorem ipsum dolor sit amet!';
print HtmlTruncate::truncate($string, 10) . PHP_EOL;
class HtmlTruncate
{
const READ_STRING = 1;
const READ_OPEN_TAG = 2;
const READ_CLOSE_TAG = 3;
public static function truncate($string, $length)
{
$left = $length;
$state = self::READ_STRING;
$trunc = '';
$tags = 0;
for ($i = 0; $i < strlen($string); $i++) {
$c = $string[$i];
switch ($state) {
case self::READ_STRING:
if ($c == '<') {
if ($string[$i+1] == '/') {
$state = self::READ_CLOSE_TAG;
} else {
$state = self::READ_OPEN_TAG;
$tags += $left ? 0 : 1;
}
$i--;
continue;
} else {
if ($left) {
$trunc .= $c;
} else {
print "skip: " . $c . PHP_EOL;
}
$left = max($left-1, 0);
}
break;
case self::READ_OPEN_TAG:
if ($left) {
$trunc .= $c;
}
if ($c == '>') {
$state = self::READ_STRING;
}
break;
case self::READ_CLOSE_TAG:
if ($left || !$tags) {
$trunc .= $c;
}
if ($c == '>') {
$tags = max($tags-1, 0);
$state = self::READ_STRING;
}
break;
}
}
return $trunc;
}
}