function extrp_get_excerpt($post_id, $maxchars = '', $q = '', $highlight = '', $snippet = '')
{
$post_id = null === $post_id ? get_the_ID() : (int) $post_id;
if ($snippet) {
$args = array('post_id' => $post_id, 'q' => $q, 'highlight' => $highlight, 'maxchars' => $maxchars);
$extrp_excerpt = extrp_excerpt($args);
$excerpt = $extrp_excerpt->get();
} else {
$excerpt = extrp_max_charlength($maxchars, strip_shortcodes(get_the_excerpt()));
}
return $excerpt;
}
protected function highlight_excerpt()
{
$text = wp_strip_all_tags($this->content);
for ($i = 0; $i < sizeof($this->keys); $i++) {
$this->keys[$i] = preg_quote($this->keys[$i], '/');
}
$workkeys = $this->keys;
$ranges = array();
$included = array();
$length = 0;
while (256 > $length && count($workkeys)) {
foreach ($workkeys as $k => $key) {
if (0 == strlen($key)) {
unset($workkeys[$k]);
continue;
}
if (256 <= $length) {
break;
}
if (!isset($included[$key])) {
$included[$key] = 0;
}
if (preg_match('/' . $key . '/iu', $text, $match, PREG_OFFSET_CAPTURE, $included[$key])) {
$p = $match[0][1];
$success = 0;
if (false !== ($q = strpos($text, ' ', max(0, $p - 60))) && $q < $p) {
$end = substr($text, $p, 80);
if (false !== ($s = strrpos($end, ' ')) && 0 < $s) {
$ranges[$q] = $p + $s;
$length += $p + $s - $q;
$included[$key] = $p + 1;
$success = 1;
}
}
if (!$success) {
$q = $this->_jamul_find_1stbyte($text, max(0, $p - 60));
$q = $this->_jamul_find_delimiter($text, $q);
$s = $this->_jamul_find_1stbyte_reverse($text, $p + 80, $p);
$s = $this->_jamul_find_delimiter($text, $s);
if ($s >= $p && $q <= $p) {
$ranges[$q] = $s;
$length += $s - $q;
$included[$key] = $p + 1;
} else {
unset($workkeys[$k]);
}
}
} else {
unset($workkeys[$k]);
}
}
}
if (0 == sizeof($ranges)) {
return '<p>' . $this->_jamul_truncate($text, $this->maxchars) . ' ...</p>';
}
ksort($ranges);
$newranges = array();
foreach ($ranges as $from2 => $to2) {
if (!isset($from1)) {
$from1 = $from2;
$to1 = $to2;
continue;
}
if ($from2 <= $to1) {
$to1 = max($to1, $to2);
} else {
$newranges[$from1] = $to1;
$from1 = $from2;
$to1 = $to2;
}
}
$newranges[$from1] = $to1;
$out = array();
foreach ($newranges as $from => $to) {
$out[] = substr($text, $from, $to - $from);
}
$text = (isset($newranges[0]) ? '' : '... ') . implode(' ... ', $out) . ' ...';
//maxchars
$text = extrp_max_charlength($this->maxchars, $text);
$text = preg_replace('/(' . implode('|', $this->keys) . ')/iu', $this->highlight, $text);
return "<p>{$text}</p>";
}
