PHP multi-file upload principle

【Foreword】

    This article describes the principle of multi-file upload, on the premise of understanding single-file upload

 

【main body】

(1) You can use $_FILES to accept file information, print and view the array

<form action="" method="post" enctype="multipart/form-data">
    <input type="file" name="file[]"/><hr>
    <input type="file" name="file[]"/><hr>
    <input type="submit" name="submit" value="提交" />
</form>
<?php
    echo "<pre>";
    var_dump($_FILES['file']);
    echo "</pre>";
?>

 

(2) When there are multiple files, it can be seen from the print data that the file information is stored in the array. At this time, a loop is needed to read the information of a single file.

$array = $_FILES['file']['name'];
    $length = count($array);
    for($i=0;$i<$length;$i++){
        echo "The file name is ".$array[$i]."<br>";
        echo "原先保存位置: " . $_FILES["file"]["tmp_name"][$i]."<br>";
        move_uploaded_file($_FILES["file"]["tmp_name"][$i],"./upload/" . $array[$i]);
        echo "Save location after submission: " . "./upload/" . $array[$i]."<br>";
    }

 Note: Add [$i] after the temporary file name to distinguish

 

【Key points】

   Mainly understand the loop to read a single information, the above is just a simple example, the focus is on logic

 

 

 

 

 

 

 

 

 

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