PHP - FileInfo close() Function

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The PHP FileInfo finfo_close() function is used to close a fileinfo resource. This function can close a resource opened by finfo_open() function, and it can return true on success, or false on failure.

Syntax

Below is the syntax of the PHP FileInfo finfo_close() function −

bool finfo_close ( resource $finfo )

Parameters

This function accepts $finfo parameter which is the file information resource that you want to close and it is created with the help of the finfo_open() function.

Return Value

The finfo_close() function returns TRUE on success, or FALSE on failure.

PHP Version

First appearing in core PHP 5.3.0, the finfo_close() function continues to function easily in PHP 7, and PHP 8.

Example 1

Here is the basic demonstration of the PHP FileInfo finfo_close() function to close a FileInfo resource.

<?php
   // Open a new FileInfo resource
   $finfo = finfo_open(FILEINFO_MIME_TYPE);
   
   // Check if the resource was created successfully
   if ($finfo) {
       // Perform operations
       
       // Close the FileInfo resource
       finfo_close($finfo);
       echo "The FileInfo resource is closed successfully!"
   } else {
       echo "Failed to create FileInfo resource.";
   }
?>

Output

Here is the outcome of the following code −

The FileInfo resource is closed successfully!

Example 2

In the following PHP example we will use the finfo_close() function to close a FileInfo resource and also we will get the MIME type.

<?php
   // Open a new FileInfo resource
   $finfo = finfo_open(FILEINFO_MIME_TYPE);
   
   // Check if the resource was created successfully
   if ($finfo) {
       // Get the MIME type of a file
       $file = '/PHP/PhpProjects/myfile.txt';
       $mime_type = finfo_file($finfo, $file);
       echo "MIME type of $file: $mime_type\n";
   
       // Close the FileInfo resource
       finfo_close($finfo);
   } else {
       echo "Failed to create FileInfo resource.";
   }
?> 

Output

This will generate the below output −

MIME type of /PHP/PhpProjects/myfile.txt: text/plain

Example 3

Now the below code retrieves the MIME type of multiple files simultaneously and close the resource using the finfo_close() function.

<?php
   // Open a new FileInfo resource
   $finfo = finfo_open(FILEINFO_MIME_TYPE);
   
   // Check if the resource is created successfully
   if ($finfo) {
       // List of files to check
       $files = ['/PHP/PhpProjects/myfile.txt', '/PHP/PhpProjects/image.jpg', '/PHP/PhpProjects/document.pdf'];
   
       // Loop over the files and get their MIME types
       foreach ($files as $file) {
           $mime_type = finfo_file($finfo, $file);
           echo "MIME type of $file: $mime_type\n";
       }
   
       // Close the FileInfo resource
       finfo_close($finfo);
   } else {
       echo "Failed to create FileInfo resource.";
   }
?> 

Output

This will create the below output −

MIME type of /PHP/PhpProjects/myfile.txt: text/plain
MIME type of /PHP/PhpProjects/image.jpg: image/gif
MIME type of /PHP/PhpProjects/document.pdf: text/plain

Example 4

In the following example, we are using the finfo_close() function to close a FileInfo resource and also handling errors.

<?php
   // Open a new FileInfo resource
   $finfo = @finfo_open(FILEINFO_MIME_TYPE);
   
   // Check if the resource was created successfully
   if ($finfo === false) {
       die("Failed to create fileinfo resource.");
   }
   
   // Get the MIME type of a file
   $file = 'example.txt';
   $mime_type = @finfo_file($finfo, $file);
   
   // Check if getting MIME type was successful
   if ($mime_type === false) {
       echo "Failed to get MIME type of $file.\n";
   } else {
       echo "MIME type of $file: $mime_type\n";
   }
   
   // Close the FileInfo resource
   if (!@finfo_close($finfo)) {
       echo "Failed to close FileInfo resource.";
   }
?> 

Output

Following is the output of the above code −

Failed to get MIME type of PHP/PhpProjects/example.txt.

Summary

The finfo_close() function is a built-in method in PHP which is used to close the FileInfo resource. And we saw four different examples to see the usage of this function with different scenarios.