Php 分析错误：语法错误，意外的“{”

我正在尝试获取index.html以使用此脚本：

<form action="upload.php" method="post"
enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file" />
<br />
<input type="submit" name="submit" value="Upload" />
</form>

在浏览了有关堆栈溢出的主题后，我一直试图通过添加/删除}来发现问题，但失败了。谁能告诉我怎么了？提前谢谢

你错过了一个收场机会

真的有点明显

<?php
    if ((($_FILES["file"]["type"] == "audio/mp3")
    || ($_FILES["file"]["type"] == "audio/mp3"))
    && ($_FILES["file"]["size"] < 21000000)) {
        if ($_FILES["file"]["error"] > 0) {
            echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
        } else {
            echo ""; //another echo to display after upload is complete

            if (file_exists("mp3/" . $_FILES["file"]["name"])) {
                echo $_FILES["file"]["name"] . " already exists. ";
            } else {
                move_uploaded_file($_FILES["file"]["tmp_name"], "mp3/" . $_FILES["file"]["name"]);
                //Below shows the link for the mp3
                echo "http://www.Domain here" . "mp3/" . $_FILES["file"]["name"] . ""; //Only change domain here leave directory

            }
        }
    } else {
        echo "Extension not allowed"; //Error message here if it's to big or wrong extension
    }
?> 

Parse error: syntax error, unexpected '{' in /var/www/xxxx/test/upload.php on line 5

if ((($_FILES["file"]["type"] == "audio/mp3") //File type
|| ($_FILES["file"]["type"] == "audio/mp3"))
&& ($_FILES["file"]["size"] < 21000000))  //20MB File Size
  {

<?php
    if ((($_FILES["file"]["type"] == "audio/mp3")
    || ($_FILES["file"]["type"] == "audio/mp3"))
    && ($_FILES["file"]["size"] < 21000000)) {
        if ($_FILES["file"]["error"] > 0) {
            echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
        } else {
            echo ""; //another echo to display after upload is complete

            if (file_exists("mp3/" . $_FILES["file"]["name"])) {
                echo $_FILES["file"]["name"] . " already exists. ";
            } else {
                move_uploaded_file($_FILES["file"]["tmp_name"], "mp3/" . $_FILES["file"]["name"]);
                //Below shows the link for the mp3
                echo "http://www.Domain here" . "mp3/" . $_FILES["file"]["name"] . ""; //Only change domain here leave directory

            }
        }
    } else {
        echo "Extension not allowed"; //Error message here if it's to big or wrong extension
    }
?>