我在这个代码段中遇到了问题，我尝试验证我尝试上传的文件。代码来自此页面，但是当我检查 mime 类型时Invalid file format.它不断抛出异常。我只需要上传PDF文件。我尝试的每个PDF文件都失败了。
这里可能有什么问题？
private function File($f) { // example from http://php.net/manual/en/features.file-upload.php
try {
if(!isset($f['file']['error']) || is_array($f['file']['error'])) {
throw new RuntimeException('Invalid parameters.');
}
switch ($f['file']['error']) {
case UPLOAD_ERR_OK:
break;
case UPLOAD_ERR_NO_FILE:
throw new RuntimeException('No file sent.');
case UPLOAD_ERR_INI_SIZE:
case UPLOAD_ERR_FORM_SIZE:
throw new RuntimeException('Exceeded filesize limit.');
default:
throw new RuntimeException('Unknown errors.');
}
if($f['file']['size'] > 10000000) {
throw new RuntimeException('Exceeded filesize limit.');
}
$finfo = new finfo(FILEINFO_MIME_TYPE);
$extentions = array(
'pdf' => 'application/pdf',
'pdf' => 'x-pdf',
'pdf' => 'application/vnd.cups-pdf',
'pdf' => 'application/vnd.sealedmedia.softseal-pdf'
);
$ext = array_search($finfo->file($f['file']['tmp_name']), $extentions);
if(false === $ext) {
throw new RuntimeException('Invalid file format.');
}
if(!move_uploaded_file($f['file']['tmp_name'], sprintf('./uploads/%s.%s', sha1_file($f['file']['tmp_name']), $ext))) {
throw new RuntimeException('Failed to move uploaded file.');
}
echo 'File is uploaded successfully.';
}
catch (RuntimeException $e) {
echo $e->getMessage();
}
}
您正在用新值覆盖$extentions中的数组键，而不是添加新的键/值对。
以下代码未按您的想法执行操作：
$extentions = array(
'pdf' => 'application/pdf',
'pdf' => 'x-pdf',
'pdf' => 'application/vnd.cups-pdf',
'pdf' => 'application/vnd.sealedmedia.softseal-pdf'
);
var_dump($extentions);将产生：
array(1) {
["pdf"]=>
string(40) "application/vnd.sealedmedia.softseal-pdf"
}
您需要添加其他 MIME 类型，而不是覆盖它们。
一个问题是：我相信你的键和值是交换的。在下文中，将有一个名为 $extensions 的数组，其中有一个键pdf与一个值相关联application/vnd.sealedmedia.softseal-pdf
$extentions = array(
'pdf' => 'application/pdf',
'pdf' => 'x-pdf',
'pdf' => 'application/vnd.cups-pdf',
'pdf' => 'application/vnd.sealedmedia.softseal-pdf'
);
我怀疑你实际上是在尝试这样做：
$extentions = array(
'application/pdf' => 'pdf',
'x-pdf' => 'pdf',
'application/vnd.cups-pdf' => 'pdf',
'application/vnd.sealedmedia.softseal-pdf' => 'pdf'
);
$ext = @$extensions[$finfo->file($f['file']['tmp_name'])];