Question

HY！我试图为长标题做一个摘录，但最后一句话不应该被削减。我已经阅读了这个问题的相关主题，但似乎它引用了另一个问题（在搜索结果上）。这是我现在的职能

function excerpt($title) {
        $new = substr($title, 0, 27);

        if (strlen($title) > 30) {
            return $new.'...';
        } else {
            return $title;
        }
    }

Answer 1

我修改了@mohd zubair khan的解决方案，以满足问题的要求。

问题在于缩短字符串而不将其从尾部切下。这是我的代码。

function strWordCut($string,$length)
{
    $str_len = strlen($string);
    $string = strip_tags($string);

    if ($str_len > $length) {

        // truncate string
        $stringCut = substr($string, 0, $length-15);
        $string = $stringCut.'.....'.substr($string, $str_len-10, $str_len-1);
    }
    return $string;
}

Answer 2

I was actually able to solve it with:

if (strlen($title) < 30) {
     return $title;
} else {

   $new = wordwrap($title, 28);
   $new = explode("\n", $new);

   $new = $new[0] . '...';

   return $new;
}

Answer 3

function strWordCut($string,$length,$end='....')
{
    $string = strip_tags($string);

    if (strlen($string) > $length) {

        // truncate string
        $stringCut = substr($string, 0, $length);

        // make sure it ends in a word so assassinate doesn't become ass...
        $string = substr($stringCut, 0, strrpos($stringCut, ' ')).$end;
    }
    return $string;
}

Answer 4

这是一个可以执行您想要的功能，并且检查它的测试功能是按预期工作的。

function excerpt($title, $cutOffLength) {

    $charAtPosition = "";
    $titleLength = strlen($title);

    do {
        $cutOffLength++;
        $charAtPosition = substr($title, $cutOffLength, 1);
    } while ($cutOffLength < $titleLength && $charAtPosition != " ");

    return substr($title, 0, $cutOffLength) . '...';

}

function test_excerpt($length) {

    echo excerpt("This is a very long sentence that i would like to be shortened", $length);
    echo "
";
    echo excerpt("The quick brown fox jumps over the lazy dog", $length);
    echo "
";
    echo excerpt("nospace", $length);
    echo "
";
    echo excerpt("A short", $length);
    echo "

";

}

test_excerpt(5);
test_excerpt(10);
test_excerpt(15);
test_excerpt(20);
test_excerpt(50);

输出 -

This is...
The quick...
nospace...
A short...

This is a very...
The quick brown...
nospace...
A short...

This is a very long...
The quick brown fox...
nospace...
A short...

This is a very long sentence...
The quick brown fox jumps...
nospace...
A short...

This is a very long sentence that i would like to be...
The quick brown fox jumps over the lazy dog...
nospace...
A short...

用php删除最后一个单词的摘录

4 个答案: