內爆和爆炸聯想陣列

Question

我目前正在研究一個學校項目，無法設法弄清楚如何正確爆炸和爆炸陣列。我的目標是能夠添加新用戶，能夠刪除用戶並更新用戶。爲了達到這個目標，我需要正確獲取我的關鍵值對。

謝謝

<?php 
class index { 

    function __construct(){} 

我的CSV讀取結果在下面的

 
Array 
(
    [Email = test@mail.com] => FirstName = fake_firstname 
) 

public function display() { 

     $filename = 'testfile.csv'; 
     $lines  = file($filename); 
     $data  = array(); 

     echo "<tr> 
     <th>Email</th> 
     <th>First</th> 
     <th>Last</th> 
     </tr><br>"; 
     foreach($lines as $info) { 
      list($key, $value) = explode(',', $info); 
      $result[$key] = $value; 

      echo "<pre>"; 
      print_r($result); 
      echo "</pre>"; 
     } 
    } 

    public function add($Fname, $Lname, $Email) { 
     $this->Fname = $Fname; 
     $this->Lname = $Lname; 
     $this->Email = $Email; 
     $this->person = array('Email'=>$this->Email,'FirstName' =>$this->Fname, 
     'LastName' =>$this->Lname); 
     $this->save($this->person); 

     print_r($this->person); 
    } 

    public function save($arr) { 
     $filename = 'testfile.csv'; 
     $myfile = fopen($filename, "a+") or die("Unable to open file!"); 
     foreach($arr as $key => $value){ 
      $new[] = $key.' = '.$value; 
      $final = implode(",", $new); 
     } 
     fwrite($myfile, $final."\r\n"); 

     fclose($myfile); 
    } 

我的CSV保存的結果是以下Email = test@mail.com,FirstName = fake_firstname,LastName = fake_lastname

public function form(){ 
     include('add.html'); 
    } 

} // close off class index 

?> 

Answer 1

你爲什麼不拿到csv文件的內容爲一個字符串，使用爆炸兩次，一次爆炸（「，」，$ CSVString），然後爲每個索引調用爆炸（「=」，$ array [$ i]），如果需要trim（）第二次爆炸是爲了擺脫末端和開始的空間。需要注意的是第二個爆炸是一個數組，所以你必須使用

$email = trim(explode("=", $yourArray[0])[1]); 
$Fname = trim(explode("=", $yourArray[1])[1]); 
$Lname = trim(explode("=", $yourArray[2])[1]); 

這種非常緊湊的代碼創建了三個陣列，每個信息（郵件，FNAME，LNAME），並直接挑選neccessary字符串，修剪它並將該值放入一個變量中。 如果您需要進一步的幫助或完善，請讓我知道。

Answer 2

你也可能會引起爆炸的每一行一次

<?php 

$line = 'Email = test@mail.com,FirstName = fake_firstname,LastName = fake_lastname'; 

$parts = explode(',', str_replace(array(' = ', 'Email', 'FirstName', 'LastName'), '', $line)); 

// email = $parts[0] 
// firstname = $parts[1] 
// lastname = $parts[2] 
?> 

Answer 3

顯然你是在.csv文件的結構的控制。所以我說，使用鍵作爲.csv中的標題。 personFile.csv應該只是在它的頭開始

personFile.csv

Email,First Name,Last Name 

隨着它

<?php 
class index { 

    function __construct(){} 

    public function display() { 
     $filename = 'personFile.csv'; 
     $lines  = file($filename); 
     $data  = array(); // store the contents of the file in an associative array for future use? 

     // the first row is the header 
     $headers = $lines[0]; 
     $countHeaders = count($headers); // store the count for future use 
     echo " 
     <tr> 
      <th>" . implode("</th><th>",explode(",",$headers)) . "</th> 
     </tr>"; 

     // array_slice($lines, 1) will return all the lines in $lines except for the first line 
     foreach(array_slice($lines,1) as $row) { 
      echo " 
     <tr> 
      <td>" . implode("</td><td>",explode(",",$row)) . "</td> 
     </tr>"; 
     } 
    } 
    public function add($Fname, $Lname, $Email) { 
     $this->Fname = $Fname; 
     $this->Lname = $Lname; 
     $this->Email = $Email; 
     $this->person = array('Email'=>$this->Email,'FirstName' =>$this->Fname, 
     'LastName' =>$this->Lname); 
     $this->save($this->person); 

     print_r($this->person); 
    } 

    public function save($arr) { 
     $filename = 'personFile.csv'; 
     $myfile = fopen($filename, "a+") or die("Unable to open file!"); 

     $final = "\r\n" . implode(',',$arr); 

     fwrite($myfile, $final); 

     fclose($myfile); 
    } 
    public function form(){ 
     include('add.html'); 
    } 
    //return true if the person was found and removed. else return false 
    public function removePersonUsingEmail($emailToRemove) { 
     $filename = 'personFile.csv'; 
     $lines  = file($filename); 

     // the first row is the header 
     $headers = $lines[0]; 
     $emailColumn = array_search("Email",$headers); 

     $lines = array_slice($lines, 1); 
     // array_slice($lines, 1) will return all the lines in $lines except for the first line 
     foreach($lines as $rowNum => $row) { 
      if($row[$emailColumn] === $emailToRemove) { 
       unset($lines[$rowNum]); 
       $final = implode(",",$headers); 
       foreach($lines as $row) { 
        $final .= "\r\n" . implode(",",$row); 
       } 

       $myfile = fopen($filename, "w") or die("Unable to open file!"); 
       fwrite($myfile, $final); 
       fclose($myfile); 
       return true; 
      } 
     } 

     return false; 
    } 
} // close off class index 
?> 

只有線

Answer 4

list($fname, $lname) = explode(' ', $N1,2); 

誰能解釋一下什麼是 「2」在這裏表示？