php搞砸了我的JavaScript，按钮无法打开

Question

I have a javascript button on my site that is supposed to popup a URL at random from an external txt file of urls (one per line) but the php keeps messing up the javascript by inserting an extra break.

 <a href="#" onClick="javascript:window.open('http://something.com/a.php?u=<?php echo $url ?>', 'yea', 'height=520, width=400, location=no, menubar=no, resizable=no, scrollbars=no, status=no, titlebar = yes, toolbar=no');"><img src="clic.jpg" border="0"></a>

<?php 

$urls = @file('urls.txt');
$num = count($urls)-1;
$url = $urls[rand(0,$num)];

?> 

Answer 1

像这样使用file（） ：
@file( 'urls.txt', FILE_IGNORE_NEW_LINES );

Answer 2

file() reads the entire file in to an array WITH the newlines still attached.

Try this:

$url = trim($urls[rand(0,$num)]);

Answer 3

Try this:

$url = trim($urls[rand(0,$num)]);

Each line has the CR (and LF) characters that mark a new line at its end. The trim function will remove such extra whitespace characters from the string.

Answer 4

<?php 

$urls = @file('urls.txt');
$num = count($urls)-1;
$url = $urls[rand(0,$num)];
$url = trim($url);
?>