我试图在这个php函数产生的截断字符串的末尾添加省略号。它是WordPress插件的一部分。但是,唉,我只是在学习PHP……
我尝试在函数末尾附近的结束HTML标记之前打印省略号,如下所示
$truncate .= '... </' . $tag . '>';
但没有运气。有什么想法吗?它必须相当简单。
整个功能如下:
if( !function_exists( 'yd_cake_truncate' ) ) {
function yd_cake_truncate($text, $length = 100, $ending = '...', $exact = true, $considerHtml = false) {
if ($considerHtml) {
if (strlen(preg_replace('/<.*?>/', '', $text)) <= $length) {
return $text;
}
preg_match_all('/(<.+?>)?([^<>]*)/s', $text, $lines, PREG_SET_ORDER);
$total_length = strlen($ending);
$open_tags = array();
$truncate = '';
foreach ($lines as $line_matchings) {
if (!empty($line_matchings[1])) {
if (preg_match('/^<(\s*.+?\/\s*|\s*(img|br|input|hr|area|base|basefont|col|frame|isindex|link|meta|param)(\s.+?)?)>$/is', $line_matchings[1])) {
} else if (preg_match('/^<\s*\/([^\s]+?)\s*>$/s', $line_matchings[1], $tag_matchings)) {
$pos = array_search($tag_matchings[1], $open_tags);
if ($pos !== false) {
unset($open_tags[$pos]);
}
} else if (preg_match('/^<\s*([^\s>!]+).*?>$/s', $line_matchings[1], $tag_matchings)) {
array_unshift($open_tags, strtolower($tag_matchings[1]));
}
$truncate .= $line_matchings[1];
}
$content_length = strlen(preg_replace('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|&#x[0-9a-f]{1,6};/i', ' ', $line_matchings[2]));
if ($total_length+$content_length> $length) {
$left = $length - $total_length;
$entities_length = 0;
if (preg_match_all('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|&#x[0-9a-f]{1,6};/i', $line_matchings[2], $entities, PREG_OFFSET_CAPTURE)) {
foreach ($entities[0] as $entity) {
if ($entity[1]+1-$entities_length <= $left) {
$left--;
$entities_length += strlen($entity[0]);
} else {
break;
}
}
}
$truncate .= substr($line_matchings[2], 0, $left+$entities_length);
break;
} else {
$truncate .= $line_matchings[2];
$total_length += $content_length;
}
if($total_length>= $length) {
break;
}
}
} else {
if (strlen($text) <= $length) {
return $text;
} else {
$truncate = substr($text, 0, $length - strlen($ending));
}
}
if (!$exact) {
$spacepos = strrpos($truncate, ' ');
if (isset($spacepos)) {
$truncate = substr($truncate, 0, $spacepos);
}
}
$truncate .= $ending;
if($considerHtml) {
foreach ($open_tags as $tag) {
$truncate .= '</' . $tag . '>';
}
}
return $truncate;
}
}