我只是PHP的新手,
现在我在拆分内容功能方面遇到了麻烦, 我有一个字符串看起来像这样:
$tring = 'World Cup 2014 draw: England's chances of landing tough group rise';
我的splitcontent代码:
if(strlen($string)<$width){
return $string;
}
$string = substr($string,0,$width);
$string = $string.'...';
return $string;
结果是:
2014年世界杯抽签:英格兰队的成功机会......,
当我插入
$string = substr($string,0,strrpos($string,' '));
它看起来像这样:
2014年世界杯平局:英格兰有机会......,
现在我希望我的字符串看起来像这样:
2014年世界杯平局:英格兰队登陆的机会...... 我该怎么办 ?谢谢你的帮助
答案 0 :(得分:3)
这会将内容分成$width
个字符,但是如果它落在一个单词上,它将匹配单词的结尾(所以它实际上是$ width + [num chars直到单词的结尾,如果在中间一个“单词”被定义为字母,数字,下划线,连字符或单引号。这将把“英格兰”或“英格兰”或“前文本”之类的内容解释为整个单词。
$width = 20;
$text = "World Cup 2014 draw: England's chances of landi-ng tough group rise";
preg_match("~^.{".($width-1)."}([\w'-]+)?~i",$text,$m);
$newtext = $m[0].'...';
echo $newtext.'<br/>';
答案 1 :(得分:1)
可能这个功能会对你有所帮助。它可以帮助您截断内容或字符串,而不会让文字在中间切割。它还考虑HTML标记。
function truncate_content( $text, $length = 100, $ending = '...', $exact = false, $considerHtml = true)
{
if ($considerHtml)
{
// if the plain text is shorter than the maximum length, return the whole text
if (strlen(preg_replace('/<.*?>/', '', $text)) <= $length)
{
return $text;
}
// splits all html-tags to scanable lines
preg_match_all('/(<.+?>)?([^<>]*)/s', $text, $lines, PREG_SET_ORDER);
$total_length = strlen($ending);
$open_tags = array();
$truncate = '';
foreach ($lines as $line_matchings)
{
// if there is any html-tag in this line, handle it and add it (uncounted) to the output
if (!empty($line_matchings[1]))
{
// if it's an "empty element" with or without xhtml-conform closing slash
if (preg_match('/^<(\s*.+?\/\s*|\s*(img|br|input|hr|area|base|basefont|col|frame|isindex|link|meta|param)(\s.+?)?)>$/is', $line_matchings[1]))
{
// do nothing
// if tag is a closing tag
}
else if (preg_match('/^<\s*\/([^\s]+?)\s*>$/s', $line_matchings[1], $tag_matchings))
{
// delete tag from $open_tags list
$pos = array_search($tag_matchings[1], $open_tags);
if ($pos !== false)
{
unset($open_tags[$pos]);
}
// if tag is an opening tag
}
else if (preg_match('/^<\s*([^\s>!]+).*?>$/s', $line_matchings[1], $tag_matchings))
{
// add tag to the beginning of $open_tags list
array_unshift($open_tags, strtolower($tag_matchings[1]));
}
// add html-tag to $truncate'd text
$truncate .= $line_matchings[1];
}
// calculate the length of the plain text part of the line; handle entities as one character
$content_length = strlen(preg_replace('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|[0-9a-f]{1,6};/i', ' ', $line_matchings[2]));
if ($total_length+$content_length> $length)
{
// the number of characters which are left
$left = $length - $total_length;
$entities_length = 0;
// search for html entities
if (preg_match_all('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|[0-9a-f]{1,6};/i', $line_matchings[2], $entities, PREG_OFFSET_CAPTURE)) {
// calculate the real length of all entities in the legal range
foreach ($entities[0] as $entity)
{
if ($entity[1]+1-$entities_length <= $left)
{
$left--;
$entities_length += strlen($entity[0]);
}
else
{
// no more characters left
break;
}
}
}
$truncate .= substr($line_matchings[2], 0, $left+$entities_length);
// maximum lenght is reached, so get off the loop
break;
}
else
{
$truncate .= $line_matchings[2];
$total_length += $content_length;
}
// if the maximum length is reached, get off the loop
if($total_length>= $length) {
break;
}
}
}
else
{
if (strlen($text) <= $length)
{
return $text;
}
else
{
$truncate = substr($text, 0, $length - strlen($ending));
}
}
// if the words shouldn't be cut in the middle...
if (!$exact)
{
// ...search the last occurance of a space...
$spacepos = strrpos($truncate, ' ');
if (isset($spacepos))
{
// ...and cut the text in this position
$truncate = substr($truncate, 0, $spacepos);
}
}
// add the defined ending to the text
$truncate .= $ending;
if($considerHtml)
{
// close all unclosed html-tags
foreach ($open_tags as $tag)
{
$truncate .= '</' . $tag . '>';
}
}
return $truncate;
}
在此
$text
是内容或字符串。
$length
是您希望使用
$ending
是内容被剪切时要添加的结束序列。
$exact
指定是否需要完全剪切字符串而不考虑该字。如果你指出$exact
是真的,那么它就不会考虑这个词。
$considerHtml
参数询问您是否需要考虑html,以防止在拆分内容时破坏html标记。
所以在你的情况下你可以使用:
$string = "World Cup 2014 draw: England's chances of landing tough group rise";
echo truncate_content($string, $width);
希望这有助于你