how can i remove "\n" in string in php?
<p>how to remove "\n" in string?<br>
I used 3 method bellow ,seams that only the "\s+" works , but I only want to remove \n,not all space ,how to do the job?<br>
need help, this question had puzzled me for a long time.</p>

<pre><code>$str="&lt;p&gt;
    hello&lt;br&gt;
    world
&lt;/p&gt;";

//$str=str_replace("\n","",$str);
$str=preg_replace("@\n@","",$str);
//$str=preg_replace("@\s+@"," ",$str);  
echo $str;
</code></pre>
