Open tmp file php

tmpfile

Creates a temporary file with a unique name in read-write (w+) mode and returns a file handle.

The file is automatically removed when closed (for example, by calling fclose(), or when there are no remaining references to the file handle returned by tmpfile()), or when the script ends.

If the script terminates unexpectedly, the temporary file may not be deleted.

Parameters

This function has no parameters.

Return Values

Returns a file handle, similar to the one returned by fopen(), for the new file or false on failure.

Examples

Example #1 tmpfile() example

 $temp = tmpfile(); fwrite($temp, "writing to tempfile"); fseek($temp, 0); echo fread($temp, 1024); fclose($temp); // this removes the file ?>

The above example will output:

See Also

• tempnam() — Create file with unique file name
• sys_get_temp_dir() — Returns directory path used for temporary files

PHP 8.2

(PHP 5 5.2.0, 7, 8) timezone_transitions_get Alias of DateTimeZone::getTransitions() This function an alias of: DateTimeZone::getTransitions()

(PHP 5 5.3.0, 7, 8) timezone_version_get Gets the of timezonedb Returns the current version of timezonedb.

(PHP 4 4.2.0, 5, 7, 8) token_get_all Split given source into PHP tokens token_get_all() parses the given code string into PHP language tokens using Zend

(PHP 4 4.2.0, 5, 7, 8) token_name Get the symbolic of given PHP token_name() gets the symbolic for PHP id value.

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tmpfile

Creates a temporary file with a unique name in read-write-binary (w+b) mode and returns a file handle.

The file is automatically removed when closed (for example, by calling fclose() , or when there are no remaining references to the file handle returned by tmpfile() ), or when the script ends.

If the script terminates unexpectedly, the temporary file may not be deleted.

Parameters

This function has no parameters.

Return Values

Returns a file handle, similar to the one returned by fopen() , for the new file or false on failure.

Examples

Example #1 tmpfile() example

$temp = tmpfile ();
fwrite ( $temp , «writing to tempfile» );
fseek ( $temp , 0 );
echo fread ( $temp , 1024 );
fclose ( $temp ); // this removes the file
?>

The above example will output:

See Also

• tempnam() — Create file with unique file name
• sys_get_temp_dir() — Returns directory path used for temporary files

User Contributed Notes 7 notes

To get the underlying file path of a tmpfile file pointer:

$file = tmpfile ();
$path = stream_get_meta_data ( $file )[ ‘uri’ ]; // eg: /tmp/phpFx0513a

I found this function useful when uploading a file through FTP. One of the files I was uploading was input from a textarea on the previous page, so really there was no «file» to upload, this solved the problem nicely:

# Upload setup.inc
$fSetup = tmpfile ();
fwrite ( $fSetup , $setup );
fseek ( $fSetup , 0 );
if (! ftp_fput ( $ftp , «inc/setup.inc» , $fSetup , FTP_ASCII )) echo «
Setup file NOT inserted

» ;
>
fclose ( $fSetup );
?>

The $setup variable is the contents of the textarea.

And I’m not sure if you need the fseek($temp,0); in there either, just leave it unless you know it doesn’t effect it.

Since this function may not be working in some environments, here is a simple workaround:

function temporaryFile($name, $content)
$file = DIRECTORY_SEPARATOR .
trim(sys_get_temp_dir(), DIRECTORY_SEPARATOR) .
DIRECTORY_SEPARATOR .
ltrim($name, DIRECTORY_SEPARATOR);

register_shutdown_function(function() use($file) unlink($file);
>);

at least on Windows 10 with php 7.3.7, and Debian Linux with php 7.4.2,

the mode is not (as the documentation states) ‘w+’ , it is ‘w+b’

(an important distinction when working on Windows systems)

To get tmpfile contents:
$tmpfile = tmpfile ();
$tmpfile_path = stream_get_meta_data ( $tmpfile )[ ‘uri’ ];
// . write to tmpfile .
$tmpfile_content = file_get_contents ( $tmpfile_path );
?>

Perhaps not the best way for production code, but good enough for logging or a quick var_dump() debug run.

No, the fseek() is necessary — after writing to the file, the file pointer (I’ll use «file pointer» to refer to the current position in the file, the thing you change with fseek()) is at the end of the file, and reading at the end of the file gives you EOF right away, which manifests itself as an empty upload.

Where you might be getting confused is in some systems’ requirement that one seek or flush between reading and writing the same file. fflush() satisfies that prerequisite, but it doesn’t do anything about the file pointer, and in this case the file pointer needs moving.

Beware that PHP’s tmpfile is not an equivalent of unix’ tmpfile.
PHP (at least v. 5.3.17/linux I’m using now) creates a file in /tmp with prefix «php», and deletes that file on fclose or script termination.
So, if you want to be sure that you don’t leave garbage even in case of a fatal error, or killed process, you shouldn’t rely on this function.
Use the classical method of deleting the file after creation:
$fn = tempnam ( ‘/tmp’ , ‘some-prefix-‘ );
if ( $fn )
$f = fopen ( $fn , ‘w+’ );
unlink ( $fn ); // even if fopen failed, because tempnam created the file
if ( $f )
do_something_with_file_handle ( $f );
>
>
?>

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A convenience class for temporary files

License

mikehaertl/php-tmpfile

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README.md

A convenience class for temporary files.

• Create temporary file with arbitrary content
• Delete file after use (can be disabled)
• Send file to client, either inline or with save dialog, optionally with custom HTTP headers
• Save file locally

 use mikehaertl\tmp\File; $file = new File('some content', '.html'); // send to client for download $file->send('home.html'); // . with custom content type (autodetected otherwhise) $file->send('home.html', 'application/pdf'); // . for inline display (download dialog otherwhise) $file->send('home.html', 'application/pdf', true); // . with custom headers $file->send('home.html', 'application/pdf', true, [ 'X-Header' => 'Example', ]); // save to disk $file->saveAs('/dir/test.html'); // Access file name and directory echo $file->getFileName(); echo $file->getTempDir();

If you want to keep the temporary file, e.g. for debugging, you can set the $delete property to false:

 use mikehaertl\tmp\File; $file = new File('some content', '.html'); $file->delete = false;

Default HTTP headers can also be added:

 use mikehaertl\tmp\File; File::$defaultHeader['X-Header'] = 'My Default'; $file = new File('some content', '.html'); $file->send('home.html');

About

A convenience class for temporary files

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PHP tmpfile() Function

Create a temporary file with a unique name in read-write (w+) mode:

fwrite($temp, «Testing, testing.»);
//Rewind to the start of file
rewind($temp);
//Read 1k from file
echo fread($temp,1024);

//This removes the file
fclose($temp);
?>

The output of the code above will be:

Definition and Usage

The tmpfile() function creates a temporary file with a unique name in read-write (w+) mode.

Note: The file is automatically removed when closed, with fclose() or when the script ends.

Tip: See also the tempnam() function.

Syntax

Technical Details

Return Value:	A file handle (similar to the one returned by fopen() for the new file), FALSE on failure
PHP Version:	4.0+

❮ PHP Filesystem Reference

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