我的表中有这样的数据：
#inlcude<stdio.h>
main() {
printf("Hi");
}
但是当我从数据库中检索数据时，它显示：
#inlude<stdio.h>main() { printf("Hi"); }
如您所见，没有换行符。这是我的整个代码：
function BBCode ($str) {
$str = htmlentities($str);
$simple_search = array(
//added line break
'/\[br\]/is',
'/\[b\](.*?)\[\/b\]/is',
'/\[i\](.*?)\[\/i\]/is',
'/\[u\](.*?)\[\/u\]/is',
'/\[url\=(.*?)\](.*?)\[\/url\]/is',
'/\[url\](.*?)\[\/url\]/is',
'/\[align\=(left|center|right)\](.*?)\[\/align\]/is',
'/\[img\](.*?)\[\/img\]/is',
'/\[mail\=(.*?)\](.*?)\[\/mail\]/is',
'/\[mail\](.*?)\[\/mail\]/is',
'/\[font\=(.*?)\](.*?)\[\/font\]/is',
'/\[size\=(.*?)\](.*?)\[\/size\]/is',
'/\[color\=(.*?)\](.*?)\[\/color\]/is',
//added textarea for code presentation
'/\[codearea\](.*?)\[\/codearea\]/is',
//added paragraph
'/\[p\](.*?)\[\/p\]/is',
//smilies
'/\:angry:/is',
'/\:angel:/is',
'/\:arrow:/is',
'/\:at:/is',
'/\:biggrin:/is',
'/\:blank:/is',
'/\:blush:/is',
'/\:confused:/is',
'/\:cool:/is',
'/\:dodgy:/is',
'/\:exclamation:/is',
'/\:heart:/is',
'/\:huh:/is',
'/\:lightbulb:/is',
'/\:my:/is',
'/\:rolleyes:/is',
'/\:sad:/is',
'/\:shy:/is',
'/\:sleepy:/is',
'/\:smile:/is',
'/\:tongue:/is',
'/\:undecided:/is',
'/\:wink:/is',
// For 3rd Party Code
'/\[code\](.*?)\[\/code\]/is',
'/\[php\](.*?)\[\/php\]/is',
'/\[css\](.*?)\[\/css\]/is',
'/\[jscript\](.*?)\[\/jscript\]/is',
'/\[sql\](.*?)\[\/sql\]/is',
'/\[perl\](.*?)\[\/perl\]/is',
);
$simple_replace = array(
//added line break
'<br />',
'<strong>$1</strong>',
'<em>$1</em>',
'<u>$1</u>',
// added nofollow to prevent spam
'<a href="$1" rel="nofollow" title="$2 - $1">$2</a>',
'<a href="$1" rel="nofollow" title="$1">$1</a>',
'<div style="text-align: $1;">$2</div>',
//added alt attribute for validation
'<img src="$1" alt="" />',
'<a href="mailto:$1">$2</a>',
'<a href="mailto:$1">$1</a>',
'<span style="font-family: $1;">$2</span>',
'<span style="font-size: $1;">$2</span>',
'<span style="color: $1;">$2</span>',
//added textarea for code presentation
'<textarea class="code_container" rows="20" cols="65">$1</textarea>',
//added paragraph
'<p>$1</p>',
//smilies
'<img src="comments/smilies/angry.gif" border="0" alt="" />',
'<img src="comments/smilies/angel.gif" border="0" alt="" />',
'<img src="comments/smilies/arrow.gif" border="0" alt="" />',
'<img src="comments/smilies/at.gif" border="0" alt="" />',
'<img src="comments/smilies/biggrin.gif" border="0" alt="" />',
'<img src="comments/smilies/blank.gif" border="0" alt="" />',
'<img src="comments/smilies/blush.gif" border="0" alt="" />',
'<img src="comments/smilies/confused.gif" border="0" alt="" />',
'<img src="comments/smilies/cool.gif" border="0" alt="" />',
'<img src="comments/smilies/dodgy.gif" border="0" alt="" />',
'<img src="comments/smilies/exclamation.gif" border="0" alt="" />',
'<img src="comments/smilies/heart.gif" border="0" alt="" />',
'<img src="comments/smilies/huh.gif" border="0" alt="" />',
'<img src="comments/smilies/lightbulb.gif" border="0" alt="" />',
'<img src="comments/smilies/my.gif" border="0" alt="" />',
'<img src="comments/smilies/rolleyes.gif" border="0" alt="" />',
'<img src="comments/smilies/sad.gif" border="0" alt="" />',
'<img src="comments/smilies/shy.gif" border="0" alt="" />',
'<img src="comments/smilies/sleepy.gif" border="0" alt="" />',
'<img src="comments/smilies/smile.gif" border="0" alt="" />',
'<img src="comments/smilies/tongue.gif" border="0" alt="" />',
'<img src="comments/smilies/undecided.gif" border="0" alt="" />',
'<img src="comments/smilies/wink.gif" border="0" alt="" />',
// For 3rd Party Code
'<pre class="brush: plain;">$1</pre>',
'<pre class="brush: php;">$1</pre>',
'<pre class="brush: css;">$1</pre>',
'<pre class="brush: jscript;">$1</pre>',
'<pre class="brush: sql;">$1</pre>',
'<pre class="brush: perl;">$1</pre>',
);
// Do simple BBCode's `
$str = preg_replace ($simple_search, $simple_replace, $str);
return $str;
}
function getComments($tutid){
//fetch all comments from database where the tutorial number is the one you are asking for:
$results = mysql_query("SELECT * FROM comments WHERE qazi_id='$tutid' ORDER BY id DESC") or die(mysql_error());
//find the number of comments:
$commentNum = mysql_num_rows($results);
echo' <div class="post-bottom-section">
<h2> '.$commentNum.' comments so far (<a href="#post" title="post your own">post your own</a>)</h2>
<div class="primary">
<ol class="commentlist">';
$count = mysql_numrows($results);
$i = 0;
while ($i < $count){
$qazi_id = mysql_result($results,$i,"qazi_id");
$name = mysql_result($results,$i,"name");
$email = mysql_result($results,$i,"email");
$description =mysql_result($results,$i,"description");
$url = mysql_result($results,$i,"url");
$date = mysql_result($results,$i,"date");
echo' <li class="'.$css.'">
<div class="comment-info">
<img alt="" src="'.$grav_url.' class="avatar" height="42" width="42" />
<cite>
<a href="'.$url.'" title="'.$name.'">'.$name.'</a> Says: <br />
<span class="comment-data"><a href="'.$url.'" title="'.$date.'">'.$date.'</a></span>
</cite>
</div>
<div class="comment-text">
<p>'.BBCode($description).'</p>
</div>
</li>';
$i++;
}
echo'</ol></div></div>';
}`
如果我替换$description =mysql_result($results,$i,"description");为$description =nl2br(mysql_result($results,$i,"description"));代码显示输出为
#include<stdio.h><br /> main() <br /> { <br /%gt; printf("hi");<br /> }
<br /> 标签出现。