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我对编程很熟悉，但我面临的有点奇怪。if 语句仅适用于最后一次迭代：

输出： IN IN OUT OUT OUT OUT IN OUT IN BIN BOUT OUT OUT OUT OUT

但是，如果我添加一个 if 语句，它只会在最后一次迭代中执行：

<?php

$conn = mysqli_connect('localhost','root','','text');

if(!$conn)
{
    die(mysqli_error());
}


$open = fopen('test.txt','r');
while (!feof($open)) 
{
    
    $getTextLine = fgets($open);
    $explodeLine = explode(",",$getTextLine);
    list($Date,$ID,$Status) = $explodeLine;
    
    if($Status == "OUT"){
        echo "$Status";
    }

}
fclose($open);
?>

输出：输出

文本文件：

19-04-21 13:41:38  ,0000000917         ,IN
19-04-21 13:49:50  ,0000001310         ,IN
19-04-21 13:52:24  ,0000000505         ,OUT
19-04-21 13:53:36  ,0000000546         ,OUT
19-04-21 14:05:24  ,0000001267         ,OUT
19-04-21 14:05:32  ,0000001228         ,OUT
19-04-21 14:06:26  ,0000000454         ,IN
19-04-21 14:13:10  ,0000000990         ,OUT
19-04-21 14:17:32  ,0000001354         ,IN
19-04-21 14:27:04  ,0000000325         ,BIN
19-04-21 14:27:18  ,0000000325         ,BOUT
19-04-21 14:31:12  ,0000000649         ,OUT
19-04-21 14:32:22  ,0000000061         ,OUT
19-04-21 14:33:00  ,0000001301         ,OUT
19-04-21 14:34:34  ,0000000548         ,OUT
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