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wp_tempnam( string $filename = '', string $dir = '' )

Returns a filename of a Temporary unique file.

Description

Please note that the calling function must unlink() this itself.

The filename is based off the passed parameter or defaults to the current unix timestamp, while the directory can either be passed as well, or by leaving it blank, default to a writable temporary directory.

Parameters

$filename

(string) (Optional) Filename to base the Unique file off.

Default value: ''

$dir

(string) (Optional) Directory to store the file in.

Default value: ''

Return

(string) a writable filename

Source

File: wp-admin/includes/file.php

function wp_tempnam( $filename = '', $dir = '' ) {
	if ( empty( $dir ) ) {
		$dir = get_temp_dir();
	}

	if ( empty( $filename ) || '.' == $filename || '/' == $filename || '\\' == $filename ) {
		$filename = uniqid();
	}

	// Use the basename of the given file without the extension as the name for the temporary directory
	$temp_filename = basename( $filename );
	$temp_filename = preg_replace( '|\.[^.]*$|', '', $temp_filename );

	// If the folder is falsey, use its parent directory name instead.
	if ( ! $temp_filename ) {
		return wp_tempnam( dirname( $filename ), $dir );
	}

	// Suffix some random data to avoid filename conflicts
	$temp_filename .= '-' . wp_generate_password( 6, false );
	$temp_filename .= '.tmp';
	$temp_filename  = $dir . wp_unique_filename( $dir, $temp_filename );

	$fp = @fopen( $temp_filename, 'x' );
	if ( ! $fp && is_writable( $dir ) && file_exists( $temp_filename ) ) {
		return wp_tempnam( $filename, $dir );
	}
	if ( $fp ) {
		fclose( $fp );
	}

	return $temp_filename;
}

Changelog

Version Description
2.6.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/wp_tempnam