PHP에서 글수정 기능 구현하기

수업소개

PHP를 이용해서 기존의 글을 수정하는 방법을 알려드립니다.

index.php

<?php
function print_title(){
  if(isset($_GET['id'])){
    echo $_GET['id'];
  } else {
    echo "Welcome";
  }
}
function print_description(){
  if(isset($_GET['id'])){
    echo file_get_contents("data/".$_GET['id']);
  } else {
    echo "Hello, PHP";
  }
}
function print_list(){
  $list = scandir('./data');
  $i = 0;
  while($i < count($list)){
    if($list[$i] != '.') {
      if($list[$i] != '..') {
        echo "<li><a href=\"index.php?id=$list[$i]\">$list[$i]</a></li>\n";
      }
    }
    $i = $i + 1;
  }
}
?>
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>
      <?php
      print_title();
      ?>
    </title>
  </head>
  <body>
    <h1><a href="index.php">WEB</a></h1>
    <ol>
      <?php
      print_list();
      ?>
    </ol>
    <a href="create.php">create</a>
    <?php if(isset($_GET['id'])) { ?>
      <a href="update.php?id=<?=$_GET['id']?>">update</a>
    <?php } ?>
    <h2>
      <?php
      print_title();
      ?>
    </h2>
    <?php
    print_description();
     ?>
  </body>
</html>

update.php

<?php
function print_title(){
  if(isset($_GET['id'])){
    echo $_GET['id'];
  } else {
    echo "Welcome";
  }
}
function print_description(){
  if(isset($_GET['id'])){
    echo file_get_contents("data/".$_GET['id']);
  } else {
    echo "Hello, PHP";
  }
}
function print_list(){
  $list = scandir('./data');
  $i = 0;
  while($i < count($list)){
    if($list[$i] != '.') {
      if($list[$i] != '..') {
        echo "<li><a href=\"index.php?id=$list[$i]\">$list[$i]</a></li>\n";
      }
    }
    $i = $i + 1;
  }
}
?>
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>
      <?php
      print_title();
      ?>
    </title>
  </head>
  <body>
    <h1><a href="index.php">WEB</a></h1>
    <ol>
      <?php
      print_list();
      ?>
    </ol>
    <a href="create.php">create</a>
    <?php if(isset($_GET['id'])) { ?>
      <a href="update.php?id=<?=$_GET['id']?>">update</a>
    <?php } ?>
    <h2>
     <form action="update_process.php" method="post">
       <input type="hidden" name="old_title" value="<?=$_GET['id']?>">
       <p>
         <input type="text" name="title" placeholder="Title" value="<?php print_title(); ?>">
       </p>
       <p>
         <textarea name="description" placeholder="Description"><?php print_description(); ?></textarea>
       </p>
       <p>
         <input type="submit">
       </p>
     </form>
  </body>
</html>

update_process.php

<?php
rename('data/'.$_POST['old_title'], 'data/'.$_POST['title']);
file_put_contents('data/'.$_POST['title'], $_POST['description']);
header('Location: /index.php?id='.$_POST['title']);
?>