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escaping for special characters

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This commit is contained in:
Emanuil Rusev 2013-11-03 17:32:45 +02:00
parent 2e314ad474
commit d4d3612710
3 changed files with 53 additions and 7 deletions
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31
Parsedown.php
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@ -550,15 +550,17 @@ class Parsedown
{
foreach ($matches as $matches)
{
$url = $this->escape_special_characters($matches[4]);
if ($matches[1]) # image
{
$element = '<img alt="'.$matches[3].'" src="'.$matches[4].'">';
$element = '<img alt="'.$matches[3].'" src="'.$url.'">';
}
else
{
$element_text = $this->parse_inline_elements($matches[3]);
$element = '<a href="'.$matches[4].'">'.$element_text.'</a>';
$element = '<a href="'.$url.'">'.$element_text.'</a>';
}
# ~
@ -588,6 +590,7 @@ class Parsedown
if (isset($this->reference_map[$link_definition]))
{
$url = $this->reference_map[$link_definition];
$url = $this->escape_special_characters($url);
if ($matches[1]) # image
{
@ -613,13 +616,17 @@ class Parsedown
}
}
# Automatic Links
if (strpos($text, '<') !== FALSE and preg_match_all('/<((https?|ftp|dict):[^\^\s]+?)>/i', $text, $matches, PREG_SET_ORDER))
{
foreach ($matches as $matches)
{
$url = $this->escape_special_characters($matches[1]);
$element = '<a href=":href">:text</a>';
$element = str_replace(':text', $matches[1], $element);
$element = str_replace(':href', $matches[1], $element);
$element = str_replace(':text', $url, $element);
$element = str_replace(':href', $url, $element);
# ~
@ -633,6 +640,12 @@ class Parsedown
}
}
# ~
$text = $this->escape_special_characters($text);
# ~
if (strpos($text, '_') !== FALSE)
{
$text = preg_replace('/__(?=\S)(.+?)(?<=\S)__/', '<strong>$1</strong>', $text);
@ -649,5 +662,13 @@ class Parsedown
return $text;
}
}
private function escape_special_characters($text)
{
strpos($text, '&') !== FALSE and $text = preg_replace('/&(?!#?\w+;)/', '&amp;', $text);
$text = str_replace('<', '&lt;', $text);
return $text;
}
}

8
tests/data/special_characters.html Normal file
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@ -0,0 +1,8 @@
<p>AT&amp;T has an ampersand in their name.</p>
<p>AT&amp;T is another way to write it.</p>
<p>This &amp; that.</p>
<p>4 &lt; 5 and 6 > 5.</p>
<p>Here's a <a href="http://example.com/?foo=1&amp;bar=2">link</a> with an ampersand in the URL.</p>
<p>Here's an inline <a href="/script?foo=1&amp;bar=2">link</a>.</p>
<hr />
<p>Based on <a href="http://daringfireball.net/projects/downloads/MarkdownTest_1.0.zip">the original</a> test suite.</p>

17
tests/data/special_characters.md Normal file
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@ -0,0 +1,17 @@
AT&T has an ampersand in their name.
AT&amp;T is another way to write it.
This & that.
4 < 5 and 6 > 5.
Here's a [link] [1] with an ampersand in the URL.
Here's an inline [link](/script?foo=1&bar=2).
[1]: http://example.com/?foo=1&bar=2
---
Based on [the original](http://daringfireball.net/projects/downloads/MarkdownTest_1.0.zip) test suite.