如何防止php加载未请求的页面

我有一个php页面可以很好地执行shellscripts，直到我添加了一个curl进程，现在，页面不再加载最终结果print$output；加载curl请求的页面，是否有方法阻止此页面的加载并恢复原始行为

这是我的php代码：

<?php
$thetext = $_POST['thetext'];

//unify orthography with NMT
//system("curl --data-urlencode 'contents=$thetext' http://www.chandia.net:8080/NMT");

//new code
// Get cURL resource
$curl = curl_init();
// Set some options - we are passing in a useragent too here
curl_setopt_array($curl, array(
   CURLOPT_RETURNTRANSFER => 1,
   CURLOPT_URL => 'http://www.chandia.net:8080/NMT',
   CURLOPT_USERAGENT => 'Codular Sample cURL Request',
   CURLOPT_POST => 1,
   CURLOPT_POSTFIELDS => array(
       'contents' => $thetext
   )
));
// Send the request & save response to $resp
$resp = curl_exec($curl);
// Close request to clear up some resources
curl_close($curl);


//tokenize the textarea
system("cat ../NMT/nmt.txt | /opt/foma/linux64/flookup -i -x -w '' /srv/web/dungupeyem/tokenizer.fst > upfiles/thetext.tok"); 

//analyze the tokenized file
system("cat upfiles/thetext.tok | /opt/foma/linux64/flookup -s ' ==> ' -I f -I 1024k /srv/web/dungupeyem/dungupeyem.fst > upfiles/thetext.all");

//prepare text to output screen
system("grep '==> [^?+]' upfiles/thetext.all > upfiles/thetext.dpy");
system("sed -i 's/$/<br>/g' upfiles/thetext.dpy");

$output = file_get_contents("upfiles/thetext.dpy");
print $output;
?>

---

提前感谢

抱歉，感谢@mogosselin，我将代码从shellscript更改为php函数，最后它运行得非常好，正确的代码如下：

// Get cURL resource
$curl = curl_init();
// Set some options - we are passing in a useragent too here
curl_setopt_array($curl, array(
    CURLOPT_RETURNTRANSFER => 1,
    CURLOPT_URL => 'http://www.chandia.net:8080/NMT',
    CURLOPT_USERAGENT => 'Codular Sample cURL Request',
    CURLOPT_POST => 1,
    CURLOPT_POSTFIELDS => array(
        'contents' => $thetext
    )
));
// Send the request & save response to $resp
$resp = curl_exec($curl);
// Close request to clear up some resources
curl_close($curl);

---

那你为什么要使用curl呢？因为统一过程是在另一个应用程序中运行的，在8080端口的cherrypy下，有没有其他的方法呢？我不是专家，如果你能给我一个更好的建议，我会跟着你的…也许试着用php而不是Shell来实现卷曲这里有一个例子：Karl在说什么。。。。