php - 仅播放6秒的base64编码音乐文件

Question

你好，我有一个过程，正在上载.mp3格式的文件，将其转换为base64，然后将其保存到数据库中(当您从数据库中拉出文件以播放此文件的仅6秒钟时)？我似乎无法找出我哪里出了问题。
我只在我正在创建的网站的测试阶段，但是我想在我正式将网站完全淘汰之前得到正确的设置，我已经设置了可以正常工作的图像，但是音频和视频却存在严重问题用。
这是上传表单的代码

    <form action="action2.php" method="post" enctype="multipart/form-data">
    <label for="file">Filename:</label>
    <input type="file" name="file" id="file" /><br />
    <input type="text" name="user_id" value="<?php echo $_SESSION['user_id'] ?>" hidden="" />
    <input type="submit" name="submit" value="Submit" />
    </form>

这是上传，存储，编码和删除文件的部分。

    <?php
    require 'assests/classes/init.php';

    $temp = explode(".", $_FILES["file"]["name"]);
    $extension = end($temp);
     $allowedExts = array("mp3","wav","ogg");
    if ((($_FILES["file"]["type"] == "audio/mpeg")
    || ($_FILES["file"]["type"] == "audio/x-mpeg")
    || ($_FILES["file"]["type"] == "audio/mp3")
    || ($_FILES["file"]["type"] == "audio/x-mp3")
    || ($_FILES["file"]["type"] == "audio/mpeg3")
    || ($_FILES["file"]["type"] == "audio/x-mpeg3")
    || ($_FILES["file"]["type"] == "audio/mpg")
    || ($_FILES["file"]["type"] == "audio/x-mpg")
    || ($_FILES["file"]["type"] == "audio/x-mpegaudio")
    || ($_FILES["file"]["type"] == "audio/wav")
    || ($_FILES["file"]["type"] == "audio/x-wav")
    || ($_FILES["file"]["type"] == "audio/ogg"))   
    && ($_FILES["file"]["size"] < 2000000000000000000000)
    && in_array($extension, $allowedExts))
      {
      if ($_FILES["file"]["error"] > 0)
        {
        echo "Return Code: " . $_FILES["file"]["error"] . "<br>";
        }
      else
        {
        echo "Upload: " . $_FILES["file"]["name"] . "<br>";
        echo "Type: " . $_FILES["file"]["type"] . "<br>";
        echo "Size: " . ($_FILES["file"]["size"] / 1048576) . " MB<br>";
        echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br>";
        echo (20000000 / 1024);
        if (file_exists("upload/" . $_FILES["file"]["name"]))
          {
          echo $_FILES["file"]["name"] . " already exists. ";
          }
        else
          {
          move_uploaded_file($_FILES["file"]["tmp_name"],
          "upload/" . $_FILES["file"]["name"]);
          var_dump($_FILES);
          $byte_array = file_get_contents("upload/" . $_FILES["file"]["name"]);
          $audio = base64_encode($byte_array);
          unlink('upload/'.$_FILES["file"]["name"]);
          $jk = new users;
          $jk->audio_upload($_POST['user_id'],$audio);
          echo $audio;
          var_dump($jk->audio_upload($_POST['user_id'],$audio));
          var_dump($audio);
          }
        }
      }
    else
      {
      echo "Invalid file";
      }

    var_dump($_FILES);
    var_dump($extension);
    ?>

然后我用它来玩

    <?php
    $jk = new users;
    $audio = $jk->testing_audio_base_64($_SESSION['user_id']);
    var_dump($audio);
    ?>
    <audio controls >
   <?php echo '<source src="data:audio/mp3;base64, '.$audio.'" >'?>
     Your browser does not support the audio element.
    </audio>

但是它只显示文件的6秒？
我在这里做错了吗？

Answer 1

某些浏览器会限制数据网址的大小，例如IE8

Data URIs cannot be larger than 32,768 characters.

或Gecko

Although Mozilla supports data URIs of essentially unlimited length, browsers are not required to support any particular maximum length of data. For example, the Opera 11 browser limits data URIs to around 65000 characters.

另一个问题可能是PHP最大发布/上传大小或内存限制。