使用 php 获取 <tag> 和 </tag> 之间的所有内容
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get everything between <tag> and </tag> with php
提问by Nate
I'm trying to grab a string within a string using regex.
我正在尝试使用正则表达式抓取字符串中的字符串。
I've looked and looked but I can't seem to get any of the examples I have to work.
我看了又看，但我似乎无法得到任何我必须工作的例子。
I need to grab the html tags <code> and </code> and everything in between them.
我需要获取 html 标签 <code> 和 </code> 以及它们之间的所有内容。
Then I need to pull the matched string from the parent string, do operations on both,
然后我需要从父字符串中提取匹配的字符串，对两者进行操作，
then put the matched string back into the parent string.
然后将匹配的字符串放回父字符串。
Here's my code:
这是我的代码：
$content = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. <code>Donec sed erat vel diam ultricies commodo. Nunc venenatis tellus eu quam suscipit quis fermentum dolor vehicula.</code>"
$regex='';
$code = preg_match($regex, $text, $matches);
I've already tried these without success:
我已经尝试过这些但没有成功：
$regex = "/<code\s*(.*)\>(.*)<\/code>/";
$regex = "/<code>(.*)<\/code>/";
回答by piouPiouM
You can use the following:
您可以使用以下内容：
$regex = '#<\s*?code\b[^>]*>(.*?)</code\b[^>]*>#s';
\bensures that a typo (like<codeS>) is not captured.- The first pattern
[^>]*captures the content of a tag with attributes (eg a class). - Finally, the flag
scapture content with newlines.
\b确保<codeS>不会捕获错字（如）。- 第一个模式
[^>]*捕获带有属性（例如类）的标签的内容。 - 最后，标志
s用换行符捕获内容。
See the result here : http://lumadis.be/regex/test_regex.php?id=1081
回答by Joe
$regex = '#<code>(.*?)</code>#';
Using #as the delimiter instead of /because then we don't need to escape the /in </code>
使用#作为分隔符，而不是/因为那时我们不需要逃避/的</code>
As Phoenix posted below, .*?is used to make the .*("anything") match as few characters as possible before it comes across a </code>(known as a "non-greedy quantifier"). That way, if your string is
正如 Phoenix 在下面发布的那样，.*?用于使.*（“任何东西”）在遇到 a </code>（称为“非贪婪量词”）之前匹配尽可能少的字符。这样，如果你的字符串是
<code>hello</code> something <code>again</code>
you'll match helloand againinstead of just matching hello</code> something <code>again.
你会匹配hello而again不是仅仅匹配hello</code> something <code>again.
回答by moni as
this function worked for me
这个功能对我有用
<?php
function everything_in_tags($string, $tagname)
{
$pattern = "#<\s*?$tagname\b[^>]*>(.*?)</$tagname\b[^>]*>#s";
preg_match($pattern, $string, $matches);
return $matches[1];
}
?>
回答by Alberto
you can use /<code>([\s\S]*)<\/code>/msUthis catch NEWLINES too!
你也可以使用/<code>([\s\S]*)<\/code>/msU这个 catch NEWLINES！
回答by Nate
function contentDisplay($text)
{
//replace UTF-8
$convertUT8 = array("\xe2\x80\x98", "\xe2\x80\x99", "\xe2\x80\x9c", "\xe2\x80\x9d", "\xe2\x80\x93", "\xe2\x80\x94", "\xe2\x80\xa6");
$to = array("'", "'", '"', '"', '-', '--', '...');
$text = str_replace($convertUT8,$to,$text);
//replace Windows-1252
$convertWin1252 = array(chr(145), chr(146), chr(147), chr(148), chr(150), chr(151), chr(133));
$to = array("'", "'", '"', '"', '-', '--', '...');
$text = str_replace($convertWin1252,$to,$text);
//replace accents
$convertAccents = array('à', 'á', '?', '?', '?', '?', '?', '?', 'è', 'é', 'ê', '?', 'ì', 'í', '?', '?', 'D', '?', 'ò', 'ó', '?', '?', '?', '?', 'ù', 'ú', '?', 'ü', 'Y', '?', 'à', 'á', 'a', '?', '?', '?', '?', '?', 'è', 'é', 'ê', '?', 'ì', 'í', '?', '?', '?', 'ò', 'ó', '?', '?', '?', '?', 'ù', 'ú', '?', 'ü', 'y', '?', 'A', 'a', 'A', 'a', 'A', 'a', 'C', 'c', 'C', 'c', 'C', 'c', 'C', 'c', 'D', 'd', 'D', 'd', 'E', 'e', 'E', 'e', 'E', 'e', 'E', 'e', 'E', 'e', 'G', 'g', 'G', 'g', 'G', 'g', 'G', 'g', 'H', 'h', 'H', 'h', 'I', 'i', 'I', 'i', 'I', 'i', 'I', 'i', 'I', 'i', '?', '?', 'J', 'j', 'K', 'k', 'L', 'l', 'L', 'l', 'L', 'l', '?', '?', 'L', 'l', 'N', 'n', 'N', 'n', 'N', 'n', '?', 'O', 'o', 'O', 'o', 'O', 'o', '?', '?', 'R', 'r', 'R', 'r', 'R', 'r', 'S', 's', 'S', 's', 'S', 's', '?', '?', 'T', 't', 'T', 't', 'T', 't', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'W', 'w', 'Y', 'y', '?', 'Z', 'z', 'Z', 'z', '?', '?', '?', '?', 'O', 'o', 'U', 'u', 'A', 'a', 'I', 'i', 'O', 'o', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', '?', '?', '?', '?', '?', '?');
$to = array('A', 'A', 'A', 'A', 'A', 'A', 'AE', 'C', 'E', 'E', 'E', 'E', 'I', 'I', 'I', 'I', 'D', 'N', 'O', 'O', 'O', 'O', 'O', 'O', 'U', 'U', 'U', 'U', 'Y', 's', 'a', 'a', 'a', 'a', 'a', 'a', 'ae', 'c', 'e', 'e', 'e', 'e', 'i', 'i', 'i', 'i', 'n', 'o', 'o', 'o', 'o', 'o', 'o', 'u', 'u', 'u', 'u', 'y', 'y', 'A', 'a', 'A', 'a', 'A', 'a', 'C', 'c', 'C', 'c', 'C', 'c', 'C', 'c', 'D', 'd', 'D', 'd', 'E', 'e', 'E', 'e', 'E', 'e', 'E', 'e', 'E', 'e', 'G', 'g', 'G', 'g', 'G', 'g', 'G', 'g', 'H', 'h', 'H', 'h', 'I', 'i', 'I', 'i', 'I', 'i', 'I', 'i', 'I', 'i', 'IJ', 'ij', 'J', 'j', 'K', 'k', 'L', 'l', 'L', 'l', 'L', 'l', 'L', 'l', 'l', 'l', 'N', 'n', 'N', 'n', 'N', 'n', 'n', 'O', 'o', 'O', 'o', 'O', 'o', 'OE', 'oe', 'R', 'r', 'R', 'r', 'R', 'r', 'S', 's', 'S', 's', 'S', 's', 'S', 's', 'T', 't', 'T', 't', 'T', 't', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'W', 'w', 'Y', 'y', 'Y', 'Z', 'z', 'Z', 'z', 'Z', 'z', 's', 'f', 'O', 'o', 'U', 'u', 'A', 'a', 'I', 'i', 'O', 'o', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'A', 'a', 'AE', 'ae', 'O', 'o');
$text = str_replace($convertAccents,$to,$text);
//Encode the characters
$text = htmlentities($text);
//normalize the line breaks (here because it applies to all text)
$text = str_replace("\r\n", "\n", $text);
$text = str_replace("\r", "\n", $text);
//decode the <code> tags
$codeOpen = htmlentities('<').'code'.htmlentities('>');
if (strpos($text, $codeOpen))
{
$text = str_replace($codeOpen, html_entity_decode(htmlentities('<')) . "code" . html_entity_decode(htmlentities('>')), $text);
}
$codeOpen = htmlentities('<').'/code'.htmlentities('>');
if (strpos($text, $codeOpen))
{
$text = str_replace($codeOpen, html_entity_decode(htmlentities('<')) . "/code" . html_entity_decode(htmlentities('>')), $text);
}
//match everything between <code> and </code>, the msU is what makes this work here, ADD this to REGEX archive
$regex = '/<code>(.*)<\/code>/msU';
$code = preg_match($regex, $text, $matches);
if ($code == 1)
{
if (is_array($matches) && count($matches) >= 2)
{
$newcode = $matches[1];
$newcode = nl2br($newcode);
}
//remove <code>and this</code> from $text;
$text = str_replace('<code>' . $matches[1] . '</code>', 'PLACEHOLDERCODE1', $text);
//convert the line breaks to paragraphs
$text = '<p>' . str_replace("\n\n", '</p><p>', $text) . '</p>';
$text = str_replace("\n" , '<br />', $text);
$text = str_replace('</p><p>', '</p>' . "\n\n" . '<p>', $text);
$text = str_replace('PLACEHOLDERCODE1', '<code>'.$newcode.'</code>', $text);
}
else
{
$code = false;
}
if ($code == false)
{
//convert the line breaks to paragraphs
$text = '<p>' . str_replace("\n\n", '</p><p>', $text) . '</p>';
$text = str_replace("\n" , '<br />', $text);
$text = str_replace('</p><p>', '</p>' . "\n\n" . '<p>', $text);
}
return $text;
}
回答by Milind Singh
You can also try:
你也可以试试：
function getTagValue($string, $tag)
{
$pattern = "/<{$tag}>(.*?)<\/{$tag}>/s";
preg_match($pattern, $string, $matches);
return isset($matches[1]) ? $matches[1] : '';
}
It returns empty string in case of no match.
如果不匹配，则返回空字符串。
