PHP上傳圖片到資料庫並顯示

2020-07-16 10:06:09
PHP上傳圖片到資料庫並顯示

1、建立資料表

CREATE TABLE ccs_image (
  id int(4) unsigned NOT NULL auto_increment,
  description varchar(250) default NULL,
  bin_data longblob,
  filename varchar(50) default NULL,
  filesize varchar(50) default NULL,
  filetype varchar(50) default NULL,
  PRIMARY KEY (id)
)engine=myisam DEFAULT charset=utf8

2、用於上傳圖片到伺服器的頁面 upimage.html

<!doctype html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <style type="text/css">
        *{margin: 1%}
    </style>
    <title>Document</title>
</head>
<body>
<form method="post" action="upimage.php" enctype="multipart/form-data">
    描述:
    <input type="text" name="form_description" size="40">
    <input type="hidden" name="MAX_FILE_SIZE" value="1000000"> <br>
    上傳檔案到資料庫:
    <input type="file" name="form_data" size="40"><br>
    <input type="submit" name="submit" value="submit">
</form>
</body>
</html>

3、處理圖片上傳的php upimage.php

<?php
if (isset($_POST['submit'])) {
    $form_description = $_POST['form_description'];
    $form_data_name = $_FILES['form_data']['name'];
    $form_data_size = $_FILES['form_data']['size'];
    $form_data_type = $_FILES['form_data']['type'];
    $form_data = $_FILES['form_data']['tmp_name'];
    
    $dsn = 'mysql:dbname=test;host=localhost';
    $pdo = new PDO($dsn, 'root', 'root');
    $data = addslashes(fread(fopen($form_data, "r"), filesize($form_data)));
    //echo "mysqlPicture=".$data;
    
    $result = $pdo->query("INSERT INTO ccs_image (description,bin_data,filename,filesize,filetype)
                  VALUES ('$form_description','$data','$form_data_name','$form_data_size','$form_data_type')");
    if ($result) {
        echo "圖片已儲存到資料庫";
    } else {
        echo "請求失敗,請重試";

註:圖片是以二進位制blob形式存進資料庫的,像這樣

4、顯示圖片的php getimage.php

<?php
 
    $id =2;// $_GET['id']; 為簡潔,直接將id寫上了,正常應該是通過使用者填入的id獲取的
    $dsn ='mysql:dbname=test;host=localhost';
    $pdo = new PDO($dsn,'root','root');
    $query = "select bin_data,filetype from ccs_image where id=2";
    $result = $pdo->query($query);
    $result = $result->fetchAll(2);
//    var_dump($result);
    $data = $result[0]['bin_data'];
    $type = $result[0]['filetype'];
    Header( "Content-type: $type");
    echo $data;

5、到瀏覽器檢視已經上傳的圖片,看是否可以顯示

210157258e7fc9e2acae9b9068b37b1.png

是沒有問題的,證明圖片已經以二進位制的形式儲存到資料庫了

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