致命错误:在PHP中调用未定义的函数finfo_open() [英] Fatal error: Call to undefined function finfo_open() in php
问题描述
我是php的新手，我创建了用于将图像上传到sql数据库并使用php检索图像的代码.
I am new to php, i have created code for upload images to sql database and retrieve the image using php.
这是我的代码:
<html>
<head><title>File Insert</title></head>
<body>
<h3>Please Choose a File and click Submit</h3>
<form enctype="multipart/form-data" action=
"<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<input type="hidden" name="MAX_FILE_SIZE" value="10000000" />
<input name="userfile" type="file" />
<input type="submit" value="Submit" />
</form>
<?php
// check if a file was submitted
if(!isset($_FILES['userfile']))
{
echo '<p>Please select a file</p>';
}
else
{
try {
$msg= upload(); //this will upload your image
echo $msg; //Message showing success or failure.
}
catch(Exception $e) {
echo $e->getMessage();
echo 'Sorry, could not upload file';
}
}
// the upload function
function upload() {
include "mysqlconnect.php";
$maxsize = 10000000; //set to approx 10 MB
//check associated error code
if($_FILES['userfile']['error']==UPLOAD_ERR_OK) {
//check whether file is uploaded with HTTP POST
if(is_uploaded_file($_FILES['userfile']['tmp_name'])) {
//checks size of uploaded image on server side
if( $_FILES['userfile']['size'] < $maxsize) {
//checks whether uploaded file is of image type
//if(strpos(mime_content_type($_FILES['userfile']['tmp_name']),"image")===0) {
$finfo = finfo_open(FILEINFO_MIME_TYPE);
if(strpos(finfo_file($finfo, $_FILES['userfile']['tmp_name']),"image")===0) {
// prepare the image for insertion
$imgData =addslashes (file_get_contents($_FILES['userfile']['tmp_name']));
// put the image in the db...
// database connection
mysql_connect($host, $user, $pass) OR DIE (mysql_error());
// select the db
mysql_select_db ($db) OR DIE ("Unable to select db".mysql_error());
// our sql query
$sql = "INSERT INTO test_image
(image, name)
VALUES
('{$imgData}', '{$_FILES['userfile']['name']}');";
// insert the image
mysql_query($sql) or die("Error in Query: " . mysql_error());
$msg='<p>Image successfully saved in database with id ='. mysql_insert_id().' </p>';
}
else
$msg="<p>Uploaded file is not an image.</p>";
}
else {
// if the file is not less than the maximum allowed, print an error
$msg='<div>File exceeds the Maximum File limit</div>
<div>Maximum File limit is '.$maxsize.' bytes</div>
<div>File '.$_FILES['userfile']['name'].' is '.$_FILES['userfile']['size'].
' bytes</div><hr />';
}
}
else
$msg="File not uploaded successfully.";
}
else {
$msg= file_upload_error_message($_FILES['userfile']['error']);
}
return $msg;
}
// Function to return error message based on error code
function file_upload_error_message($error_code) {
switch ($error_code) {
case UPLOAD_ERR_INI_SIZE:
return 'The uploaded file exceeds the upload_max_filesize directive in php.ini';
case UPLOAD_ERR_FORM_SIZE:
return 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form';
case UPLOAD_ERR_PARTIAL:
return 'The uploaded file was only partially uploaded';
case UPLOAD_ERR_NO_FILE:
return 'No file was uploaded';
case UPLOAD_ERR_NO_TMP_DIR:
return 'Missing a temporary folder';
case UPLOAD_ERR_CANT_WRITE:
return 'Failed to write file to disk';
case UPLOAD_ERR_EXTENSION:
return 'File upload stopped by extension';
default:
return 'Unknown upload error';
}
}
?>
</body>
</html>
现在我得到了错误，致命错误:在此行上调用未定义的函数finfo_open()
Now i got the error, Fatal error: Call to undefined function finfo_open() on this line
$finfo = finfo_open(FILEINFO_MIME_TYPE); .
有人可以帮我解决这个问题吗?
Can somebody help me to fix this.
谢谢.
推荐答案
我在IIS上使用PHP遇到了同样的问题.确保像这样在php.ini中启用fileinfo.so或php_fileinfo.dll，这取决于您的平台以及PHP和OS的版本:
I had this same issue with PHP on IIS. Make sure that the fileinfo.so or php_fileinfo.dll is enabled in the php.ini like so, that depends on your platform and version of PHP and OS:
应该有一行类似于
;extension=fileinfo.so或;extension=php_fileinfo.dll
删除分号;(取消注释)
extension=fileinfo.so或extension=php_fileinfo.dll
然后保存并重新启动apache，nginx，IIS或您正在使用的任何Web服务器.
Then save and restart apache, nginx, IIS or whatever web server you are using.
如果这不起作用，请确保已安装fileinfo扩展名.
If that doesn't work, make sure that the fileinfo extension is already installed.
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