teaser到底是啥意思

teaser中文翻译的时候叫做“内容摘要”，就是像首页那里看到的一小段文章内容，点击进去才是全文。
内容摘要，缺省设置就是文章的前一小部分（具体到哪里可以自己设置），也有专门的模块来定制专门的摘要内容。

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我的Drupal试验田：http://drupal.verydummy.com
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这是我在node.module当中取下来的代码，看过后你就明白了！
/**
* Automatically generate a teaser for a node body in a given format.
*/
function node_teaser($body, $format = NULL) {

$size = variable_get('teaser_length', 600);

// Find where the delimiter is in the body
$delimiter = strpos($body, '');

// If the size is zero, and there is no delimiter, the entire body is the teaser.
if ($size == 0 && $delimiter === FALSE) {
return $body;
}

// If a valid delimiter has been specified, use it to chop off the teaser.
if ($delimiter !== FALSE) {
return substr($body, 0, $delimiter);
}

// We check for the presence of the PHP evaluator filter in the current
// format. If the body contains PHP code, we do not split it up to prevent
// parse errors.
if (isset($format)) {
$filters = filter_list_format($format);
if (isset($filters['filter/1']) && strpos($body, '<?') !== FALSE) {
return $body;
}
}

// If we have a short body, the entire body is the teaser.
if (strlen($body) < $size) {
return $body;
}

// The teaser may not be longer than maximum length specified. Initial slice.
$teaser = truncate_utf8($body, $size);
$position = 0;
// Cache the reverse of the teaser.
$reversed = strrev($teaser);

// In some cases, no delimiter has been specified. In this case, we try to
// split at paragraph boundaries.
$breakpoints = array('' => 0, '' => 6, '' => 4, "\n" => 1);
// We use strpos on the reversed needle and haystack for speed.
foreach ($breakpoints as $point => $offset) {
$length = strpos($reversed, strrev($point));
if ($length !== FALSE) {
$position = - $length - $offset;
return ($position == 0) ? $teaser : substr($teaser, 0, $position);
}
}

// When even the first paragraph is too long, we try to split at the end of
// the last full sentence.
$breakpoints = array('. ' => 1, '! ' => 1, '? ' => 1, '。' => 0, '؟ ' => 1);
$min_length = strlen($reversed);
foreach ($breakpoints as $point => $offset) {
$length = strpos($reversed, strrev($point));
if ($length !== FALSE) {
$min_length = min($length, $min_length);
$position = 0 - $length - $offset;
}
}
return ($position == 0) ? $teaser : substr($teaser, 0, $position);
}

英文wiki给出的解释：

Teaser may refer to:

* "cold open", a segment at the beginning of a television program or film before the opening credits

* Teaser trailer, a short theatrical trailer
* Teaser (gambling), a type of gambling bet that allows the bettor to combine his bets on two different games.

在drupal中主要就是文章的前一小段内容。
--
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