Question

我想将部分博客员额作为员额的导言,然后在最后添加“更多”链接,但我无法找到在字句或句尾合并案文的办法。下面的法典是空洞的 lo。

<?php

$num_of_words = 400;
while (! substr($article, $num_of_words, 1) != "")
     $num_of_words++;

?>

Any help please? Thanks

Answer 1

假设有最长的长度,即使没有白天空间,你也不想超过。

$maxlength=100; //100 characters
$mystring= I want to use part of a blog post as the introduction to the post and then add a "read more" link at the end, but I couldn t find a way to round up the text either at the end of a word or sentence. The code below runs into an empty infinite loop. ;

$mystring=substr($mystring,0,$maxlength); //now string can t be too long
$last_space=strrpos($mystring,   );
$mystring=substr($mystring,-,$last_space);

But if you really want to do it by word count, keeping in mind that words can be very long, a regex like this should match up to the 1st 25 words.

/^(w+){1,25}/

Answer 2

这样做的另一个办法是:

if (strlen($article) <= 400)
    $intro = $article;
else
    $intro = substr($article, 0, strrpos($article,    , strlen($article)-400));

Answer 3

如果你想要获得头25个字的话,你就可以使用像你这样的东西。

^([w,:]+s+){1,25}

如果你需要更经常的表达方式,那么就要求......

Answer 4

<?php

$num_of_words = 400;

$art=explode(   ,$article);
$shortened=  ;
for ($i=0 ; $i<=$num_of_words ; $i++){
    $shortened.=$art[$i].   ;
}
echo $shortened;
?>

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