如何仅显示正文中的几行
[英]How to show only few lines from a body text
问题描述
我有一个mySql数据库，我只想显示其包含html代码的body字段中的10个单词，我该怎么做，是否有任何php函数可以做到这一点。
6 个解决方案
解决方案1
1 2010-06-17 15:37:02
I would suggest to create one more column for this so you don't need to limit words on every request. 
我建议为此再增加一列，这样就不必在每个请求上都限制单词。 Limitation will be easy to do with php: 使用php限制很容易做到：
$str = '<html>word word <b> word word word word word</b> word word word <u> word</u></html>';
$str = strip_tags($str); // strip html tags
preg_match('/^\s*+(?:\S++\s*+){1,10}/u', $str, $matches); // kohana's Text::limit_words()
$str = trim($matches[0]); // first 10 words of string
解决方案2
0 2010-06-17 15:31:45
$ten = 10;
$text = strip_tags($bodyText); // remove html tags from the body text
$wordArray = str_word_count($text,2); //extract word offsets into an array
$offsetArray = array_keys($wordArray); // Convert offsets to an array indexed by word
$firstTenWords = substr($text,0,$offsetArray[$ten]-1); extract from the string between the start and tenth word
解决方案3
0 2010-06-17 15:32:55
I forgot that you wanted to get the first 10 words but I would try using a substring of a stripped string and bring back a certain number of characters. 我忘记了您想获得前10个字，但我会尝试使用剥离字符串的子字符串并带回一定数量的字符。 Probably easier code and relatively the same result: 可能更简单的代码和相对相同的结果：
<?php
$start_position = 0;
$length = 30; // number of characters, not words
$suffix = "..."
// check if string is longer than limit and if so, shorten and attach suffix
if (strlen($your_text) > ($length - 3) {
echo substr(strip_tags($your_text), $start_position, $length) . $suffix;
} else {
echo $strip_tags($your_text);
}
?>
Should do the trick if you're getting rid of all formatting, like line breaks, etc. 如果您要摆脱所有格式设置（例如换行符等），则应该采取措施。
解决方案4
0 2010-06-17 15:33:22
解决方案5
0 已采纳 2010-06-17 16:00:02
BETTER solution 更好的解决方案
function gen_string($string,$min=10,$clean=false) {
$string = str_replace('<br />',' ',$string);
$string = str_replace('</p>',' ',$string);
$string = str_replace('<li>',' ',$string);
$string = str_replace('</li>',' ',$string);
$text = trim(strip_tags($string));
if(strlen($text)>$min) {
$blank = strpos($text,' ');
if($blank) {
# limit plus last word
$extra = strpos(substr($text,$min),' ');
$max = $min+$extra;
$r = substr($text,0,$max);
if(strlen($text)>=$max && !$clean) $r=trim($r,'.').'...';
} else {
# if there are no spaces
$r = substr($text,0,$min).'...';
}
} else {
# if original length is lower than limit
$r = $text;
}
return trim($r);
}
just pass the html through the gen_string() function 只需通过gen_string（）函数传递html
解决方案6
-1 2010-06-17 15:38:50
这样的事情可能会很方便。
echo substr($returnedQuery, 0,10);
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