使用if语句，PHP file_get_contents和explode无法正常工作

问题描述：

I have a file called tracker.txt that contains 3 lines. The txt file is this: http://tracker.cpcheats.co/rookie/tracker.txt. I am using file_get_contents and explode to return each line of the array, like so:

$read = file_get_contents('tracker.txt');
$filed = explode("
",$read);
$status = $filed[0];
$server = $filed[1];
$room = $filed[2];

I then have an if statement, where the condition is if the first line of tracker.txt ($status) is 'found', then it will write out the second and third line onto the image. It doesn't work.

if ($status == 'found') {
//write out the server room and language (with shadow)
imagettftext($im, 15, 0, 140, 80, $white, $font, $server);
imagettftext($im, 15, 0, 139, 79, $black, $font, $server);
imagettftext($im, 15, 0, 140, 105, $white, $font, $room);
imagettftext($im, 15, 0, 139, 104, $black, $font, $room);
}

The odd thing is, if I just print out $status, $server and $room without the if statement, it works fine and dispays the correct lines. Why isn't it working with the condition? Because, I'm sure the first line of http://tracker.cpcheats.co/rookie/tracker.txt is 'found'.

我有一个名为tracker.txt的文件，其中包含3行。 txt文件是这样的： http://tracker.cpcheats.co/rookie/tracker.txt 一>。我正在使用file_get_contents并使用explode来返回数组的每一行，如下所示： p>

  $ read = file_get_contents（'tracker.txt'）; 
 $ filed = explode（  “
”，$ read）; 
 $ status = $ filed [0]; 
 $ server = $ filed [1]; 
 $ room = $ filed [2]; 
  code>   pre> 
 
 然后我有一个if语句，条件是如果tracker.txt（$ status）的第一行是'found'，那么它会将第二行和第三行写出到图像上 。 它不起作用。 p> 
 
 
  if（$ status =='found'）{
 // //写出服务器机房和语言（带阴影）
imagettftext（$  im，15,0,140,80，$ white，$ font，$ server）; 
imagettftext（$ im，15,0,139,79，$ black，$ font，$ server）; 
imagettftext（$ im，  15,0,140,105，$ white，$ font，$ room）; 
imagettftext（$ im，15,0,139,104，$ black，$ font，$ room）; 
} 
  code  >  pre> 
 
 奇怪的是，如果我只打印$ status，$ server和$ room而没有if语句，它可以正常工作并发出正确的行。 为什么不适应这种情况呢？ 因为，我确定 http://tracker.cpcheats.co/rookie/tracker的第一行 .txt 已“找到”。 p> 
  div>

答

You should try using trim to remove empty white space

$string = file_get_contents("http://tracker.cpcheats.co/rookie/tracker.txt");
$string = explode("
", $string);
list($status, $server, $room) = array_map("trim", $string);

Before trim

array
  0 => string 'found
' (length=6)
  1 => string ' (EN) Avalanche
' (length=16)
  2 => string 'Ice Berg' (length=8)

// After Trim

array
  0 => string 'found' (length=5)
  1 => string '(EN) Avalanche' (length=14)
  2 => string 'Ice Berg' (length=8)

Can you see that the length is of $status is different length=6 and length=5 respectively

You can also just do

if (trim($status) == 'found') {
    // .... 
}

答

Looks like you have an extra . This works:

if ($status == "found"){
   ...
}

使用if语句，PHP file_get_contents和explode无法正常工作

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