php - file_exists 在托管服务器上给出错误结果

问题描述

我正在尝试使用表单上传 .pdf 文件，并在检查文件是否存在时，即使目录没有任何文件，结果也总是正确的。

HTML 表单：

<form id="contactForm" method="post" autocomplete="off" enctype="multipart/form-data">
          <input autocomplete="false" name="hidden" type="text" style="display:none;">
          <div class="row">
            <div class="col-md-12 form-group">
              <label for="name">Name</label>
              <input type="text" name="name" class="form-control form-control-lg" id="name" required autocomplete="off">
            </div>
          </div>
          <div class="row">
            <div class="col-md-12 form-group">
              <label for="email">Email</label>
              <input type="email" name="email" id="email" class="form-control form-control-lg" autocomplete="off">
            </div>
          </div>
          <div class="row">
            <div class="col-md-12 form-group">
              <label for="email">Phone</label>
              <input type="number" name="phone" id="phone" class="form-control form-control-lg" required autocomplete="off">
            </div>
          </div>
          <div class="row">
            <div class="col-md-12 form-group">
              <label for="address">Address</label>
              <textarea name="address" id="address" class="form-control form-control-lg" cols="30" rows="8" autocomplete="off"></textarea>
            </div>
          </div>
          <div class="row">
            <div class="col-md-12 form-group">
              <label for="department">Department</label>
              <select class="form-control form-control-lg" name="department" required autocomplete="off">
                <option value="so">Select Department</option>
                <option value="Accounts">Accounts</option>
                <option value="Machine Handling">Machine Handling</option>
                <option value="Marketing">Marketing</option>
                <option value="Sales Development">Sales Development</option>
                <option value="Floor Manager">Floor Manager</option>
                <option value="After Sales Service Manager">After Sales Service Manager</option>
              </select>
            </div>
          </div>
          <div class="row">
            <div class="col-md-12 form-group">
              <label for="file">Upload Your Resume (.pdf only!)</label>
              <input type="file" name="fileToUpload" required autocomplete="off" class="form-control" accept="application/pdf">
            </div>
          </div>
          <div class="row">
            <div class="col-md-6 form-group">
              <input type="submit" name="submit" value="Send Message" class="btn btn-primary btn-lg btn-block">
            </div>
          </div>
        </form>

表格提交脚本：

<script>
$("#contactForm").submit(function(e){
  e.preventDefault();
  var form_data = $(this).serialize();
  $('input[type="submit"]').val("Sending Message...");
  $.ajax({
    type: "POST",
    url: "backend/career.php",
    dataType: "json",
    data: form_data
  }).done(function (data){
    console.log(data);
    $('input[type="submit"]').removeClass('btn-primary');
    $('input[type="submit"]').addClass('btn-success');
    $('input[type="submit"]').val("Message Sent...");
    $("#contactForm").closest('form').find("input[type='text'],input[type='number'],input[type='email'],input[type='file'], textarea, select").val("");
  }).fail(function(data){
    console.log(data);
    $('input[type="submit"]').removeClass('btn-primary');
    $('input[type="submit"]').addClass('btn-danger');
    $('input[type="submit"]').val("Sending Failed...");
    $("#contactForm").closest('form').find("input[type='text'],input[type='number'],input[type='email'],input[type='file'], textarea, select").val("");
  });
});
  </script>

PHP代码：

$target_dir = "../pdf/";
$target_file = $target_dir.basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$pdfFileType = strtolower(pathinfo($target_file,PATHINFO_EXTENSION));
if (file_exists($target_file)) {
  echo "Sorry, file already exists.";
  $uploadOk = 0;
}
if ($_FILES["fileToUpload"]["name"] > 500000) {
  echo "Sorry, your file is too large.";
  $uploadOk = 0;
}
if ($uploadOk == 0) {
  echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
}

输出：

Sorry, file already exists.Sorry, your file was not uploaded.

即使该目录中不存在任何文件，这也是输出。

如何解决这个问题？

标签： phpajaxhtmlformsfile-exists

php - file_exists 在托管服务器上给出错误结果

问题描述

解决方案

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