php文件上传

单文件上传前台

        <form action="up.php" method="post" enctype="multipart/form-data" > 
            <input type="file" name="file" id="file"><br>
            <input type="submit" name="submit" value="提交">
        </form>

多文件上传

        <form action="up.php" method="post" enctype="multipart/form-data" > 
            <input type="file" name="file[]" id="file" multiple="multiplt"><br>
            <input type="submit" name="submit" value="提交">
        </form>

后台接受：$_FILES   （$_POST这些是接受不到的）

array(1) {
  ["file"] => array(5) {
    ["name"] => array(2) {
      [0] => string(27) "360截图16501005896885.png"
      [1] => string(28) "360截图164001195710387.png"
    }
    ["type"] => array(2) {
      [0] => string(9) "image/png"
      [1] => string(9) "image/png"
    }
    ["tmp_name"] => array(2) {
      [0] => string(53) "C:UsersAdministratorAppDataLocalTempphp3671.tmp"
      [1] => string(53) "C:UsersAdministratorAppDataLocalTempphp3682.tmp"
    }
    ["error"] => array(2) {
      [0] => int(0)
      [1] => int(0)
    }
    ["size"] => array(2) {
      [0] => int(69926)
      [1] => int(39556)
    }
  }
}

or

        <form action="{:url('upload1')}" method="post" enctype="multipart/form-data" > 
            <input type="file" name="file[]" id="file"><br>
            <input type="file" name="file[]" id="file"><br>
            <input type="file" name="file[]" id="file"><br>
            <input type="submit" name="submit" value="提交">
        </form>