多种上传表格 [英] Multiple Upload Forms
问题描述
我有许多需要验证的上传文件格式(简称示例):
I have a number of upload file forms that need validating (shortened example):
<form>
<input type='file' name='file[]' class='file_upload_button'>
<input type='file' name='file[]' class='file_upload_button'>
<input type='file' name='file[]' class='file_upload_button'>
<input type='file' name='file[]' class='file_upload_button'>
<input type='submit' value='Save Draft' class='save_draft_button'>
</form>
我希望每个上传输入都可以通过文件类型进行验证，但是我很难理解需要做什么.这是我正在尝试的事情，但是显然这是不对的！
And I want each upload input to be validated by file type, but I'm having a hard to understanding what needs to be done. This is the kind of thing I'm trying, but evidently it's not right!
if (! empty($_FILES['file']['name'][0])) {
// VALIDATION goes here
}
但是我不知道如何选择第一个上载字段-我尝试使用$ _FILES ['file'] ['name'] [0]，但无济于事.任何帮助将不胜感激！
But I can't figure out how to select, for example, the first upload field - I've tried using $_FILES['file']['name'][0] but to no avail. Any hep would be appreciated!
推荐答案
我偶然地昨天写了以下脚本.
这用于调整图像的大小，PNG或GIF或JPEG.
这需要'./tmp'目录.
如果您愿意，请参考此.
By chance, I wrote the following script yesterday.
This is for resizing images, PNG or GIF or JPEG.
This requires './tmp' directory.
If you like, please refer to this.
<?php
$html = PHP_EOL;
if (!empty($_FILES['images'])) {
$finfo = new finfo(FILEINFO_MIME);
for ($i=0;;$i++) {
switch (true) {
case (!isset($_FILES['images']['tmp_name'][$i])):
break 2;
case (!is_uploaded_file($filename = $_FILES['images']['tmp_name'][$i])):
case (($type = $finfo->file($filename)) === false):
continue 2;
case ($type === 'image/png; charset=binary'):
$img = imagecreatefrompng($filename);
break;
case ($type === 'image/jpeg; charset=binary'):
$img = imagecreatefromjpeg($filename);
break;
case ($type === 'image/gif; charset=binary'):
$img = imagecreatefromgif($filename);
break;
default:
continue 2;
}
list($width, $height) = getimagesize($filename);
$new_width = 100;
$new_height = (int)($new_width * $height / $width);
$new_img = imagecreatetruecolor($new_width, $new_height);
imagecopyresampled(
$new_img, $img,
0, 0, 0, 0,
$new_width, $new_height, $width, $height
);
switch (true) {
case ($type === 'image/png; charset=binary'):
imagepng($new_img, $filename);
break;
case ($type === 'image/jpeg; charset=binary'):
imagejpeg($new_img, $filename);
break;
default:
imagegif($new_img, $filename);
}
$new_filename = './tmp/'.basename($filename);
if (move_uploaded_file($filename,$new_filename))
$html .= sprintf('<p><img src="%s" /></p>'.PHP_EOL, $new_filename);
}
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Resizer</title>
<style>
label { display: block; }
</style>
</head>
<body>
<fieldset>
<legend>Select Image File (PNG, JPEG, GIF available)</legend>
<form enctype="multipart/form-data" method="post" action="<?php echo $_SERVER['SCRIPT_NAME']; ?>">
<label><input type="file" name="images[]" /></label>
<label><input type="file" name="images[]" /></label>
<label><input type="file" name="images[]" /></label>
<label><input type="submit" value="Resize!" /></label>
</form>
</fieldset>
<fieldset>
<legend>Resized Images</legend><?php
echo $html;
?>
</fieldset>
</body>
</html>
这篇关于多种上传表格的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
