如何在PHP中逐行寫入文本文件？

Question

我很新的PHP。我有一個FORM輸入數據，FORM包含3個字段：名稱，年齡，地址 我想獲取提交的數據，並將它們逐行寫入文本文件。 例如，如果我在表單提交3次，我會在下面的文本文件：

john 
20 
US 
Simson 
18 
UK 
Marry 
26 
Japan 

I tried to implement it, but there was always a blank space in the beginning of text file, or there was always a blank space in the end of text file.I could not write file line by line. How do I do that, please help me ? 
here is my form :<br> 

<form action="themSinhVien.php" method="POST"> 
    <table id="tableHome"> 
     <tr> 
      <td id="td1"> 
       <span> Name: </span> 
      </td> 
      <td id="td2"> 
       <input type="text" name="name" placeholder="put your name here"> 
      </td> 
     </tr> 

     <tr> 
      <td id="td1"> 
       <span> Age: </span> 
      </td> 
      <td id="td2"> 
       <input type="text" name="age" placeholder="put your age here"> 
      </td> 
     </tr> 

     <tr> 
      <td id="td1"> 
       <span> Adress: </span> 
      </td> 
      <td id="td2"> 
       <input type="text" name="address" placeholder="put your address here"> 
      </td> 
     </tr> 


     <tr> 
      <td id="td1" style="padding-left:180px"> 
       <input type="submit" name="submit" value="Submit"> 
      </td> 
      <td id="td2"> 
       <input type="reset" name="reset" value="reset"> 
      </td> 
     </tr> 

    </table> 
</form> 

這裏是我的PHP腳本：

<?php 
    if(isset($_POST['submit'])){ 
     $name = "\r\n".$_POST['name']; 
     $age = "\r\n".$_POST['age']."\r\n"; 
     $address = $_POST['address'];     
     $file = fopen("student.txt","a",1); 
     fwrite($file,$name); 
     fwrite($file,$age); 
     fwrite($file,$address); 
     fclose($file); 
     echo "Adding student successfully"; 
    } 
?> 

Answer 1

只要改變你的代碼：

if(isset($_POST['submit'])){ 
        $name = $_POST['name']; 
        $age = $_POST['age']; 
        $address = $_POST['address'];     
        $file = fopen("student.txt","a"); 
        fwrite($file,$name.PHP_EOL); 
        fwrite($file,$age.PHP_EOL); 
        fwrite($file,$address.PHP_EOL); 
        fclose($file); 
        echo "Adding student successfully"; 
       } 

我希望它適合你。 :)