Example analysis of a method to implement multiple file uploads in PHP

This article mainly shares with you a method to implement multiple file uploads in PHP. Previously, when implementing the file type input in the form to select multiple images, I found a way that may not be the best, but it is feasible in personal testing and supports ie7 and above and chrome. Browser, I hope it can help everyone.

Use normal multiple file selection multiple attributes in the form

<input type="file" id="image" class="file image hidden" name="image[]" multiple="true">

Then use AjaxFileUpload or other methods to submit

The corresponding named file File$file['image'] Convert to json for printing

Normal format

##

{"name":"7332.png","type":"image\/png","tmp_name":"\/tmp\/phplqppvR","error":0,"size":659}

But the result at this time is

{"name":["7656.png","7718.png"],"type":["image/png","image/png"],"tmp_name":["/tmp/phpDzSovj","/tmp/phpP8kWmT"],"error":[0,0],"size":[357,662]}

All attributes are changed into arrays and arranged in order

At this time, you can use the following code to save the image

if (!isset($_FILES[$field])) {
  return new JsonResponse(array('errorCode'=>1, 'message'=>'请上传文件'));
}
//重新命名$_FILE 存储多个文件上传
$arrayFile = array();
foreach($_FILES[$field] as $key => $value){
  $i = 0;
  if(is_array($value)) {
    foreach ($value as $v) {
      $i++;
      //重命名后重新放入超全局变量_FILE 保证键名唯一 也可直接上传
      $name = $field . '_split_' . $i;
      $_FILES[$name][$key] = $v;
    }
  }
}
//是否上传多文件
if($i > 0){
  for($j = 1; $j <= $i; $j++){ array_push($arrayFile, $field . &#39;_split_&#39; . $j); } }else{ array_push($arrayFile, $field); } //遍历file多个文件 上传 foreach($arrayFile as $file){ if (isset($_FILES[$file]) && $_FILES[$file][&#39;name&#39;]) { //自定义上传方法 具体内容略 $data = $this->uploadFile($file, $path, uniqid());
    if ( isset($data) && !empty($data) ) {
      if(!isset($data[&#39;errors&#39;])){
        //将上传结果存储于$result中 多图片地址使用逗号拼接
        if(isset($result)){
          $result = array(&#39;errorCode&#39;=>0, &#39;message&#39;=>$result[&#39;message&#39;] . &#39;,&#39; . reset($data));
        }else{
          $result = array(&#39;errorCode&#39;=>0, &#39;message&#39;=>reset($data));
        }
      }else{
        //以下为返回错误信息
        if(is_array(reset($data))){
          $message = reset($data)[0];
        }else{
          $message = reset($data);
        }           
        $result = array(&#39;errorCode&#39; => 1, &#39;message&#39; => $message);
      }
    } else {
      $result = array(&#39;errorCode&#39;=>1, &#39;message&#39;=>&#39;上传失败&#39;);
      break;
    }
  } else {
    $result = array(&#39;errorCode&#39;=>1, &#39;message&#39;=>&#39;请上传文件&#39;);
    break;
  }
}
//返回上传结果
return $result;

Related recommendations:

How to implement common file upload functions on PHP web pages

Usage of Alibaba Cloud OSS for PHP file upload

PHP single file and multiple file upload examples_php examples

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