PHP - 如何在某一点将“...”附加到不同长度的字符串？ 例如，200个字符之后

Question

i have a mysql database and a table full of information, specifically a column of product descriptions. This column is used in my scripts twice. Its max length is 1000 characters.

One of the uses for this information is a brief description of any given product. I would like to display a shortened version of the description that I have just mentioned, so it will be say for instance 200 characters long.

Now, using PHP I would like to append the string with "..." (3 dots) at the point where it reaches 200 characters. So basically only the first 200 characters are displayed.

How would I go about something like this? I am sure it will be a fairly simple task but the internet is a big place to look for something you don't know the name of :)

If anyone could help in this regard, with an example or some links relating to the relevant functions that would be great. Thanks a lot!

Answer 1

您可以使用substr实现此目的。

$string = substr($string,0,197) . "...";

Answer 2

This one takes care of strings that aren't actually 200 chars yet.

$string = 'your long string goes here';
if (strlen($string) >= 200) {
    $string = substr($string, 0, 197).'...';
}

Source: php.net/substr

Answer 3

May I give you an alternative made in pure CSS (good for headlines, for example)?

overflow: hidden; white-space: nowrap; text-overflow: ellipsis;

cuts off too long text automatically if the element around it is not long / big enough.

Answer 4

$string = 'asd';
$maxLength = 200;
if (mb_strlen($string) > $maxLength) {
    $string = mb_substr($string, 0, $maxLength) . "...";
}

Answer 5

Only collect 200 characters from your database in the first place.

$sql = "SELECT LEFT(article, 200) as article WHERE ETC ETC "

Then apply something like this , but essentially you need to go back to the previous word end chop off the rest and apend an elipsis.

…