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wp_tempnam › WordPress Function

Since2.6.0
已弃用n/a
› wp_tempnam ( $filename = '', $dir = '' )
参数: (2)
  • (string) $filename Optional. Filename to base the Unique file off. Default empty.
    Required: No
    默认: (empty)
  • (string) $dir Optional. Directory to store the file in. Default empty.
    Required: No
    默认: (empty)
返回:
  • (string) A writable filename.
定义在:
文档:

Returns a filename of a temporary unique file.

Please note that the calling function must delete or move the file. 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.


Related Functions: wp_basename, wp_is_stream, wp_date, wp_head, wp_mail

源码 

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

	if ( empty( $filename ) || in_array( $filename, array( '.', '/', '\\' ), true ) ) {
		$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  = wp_unique_filename( $dir, $temp_filename );

	/*
	 * Filesystems typically have a limit of 255 characters for a filename.
	 *
	 * If the generated unique filename exceeds this, truncate the initial
	 * filename and try again.
	 *
	 * As it's possible that the truncated filename may exist, producing a
	 * suffix of "-1" or "-10" which could exceed the limit again, truncate
	 * it to 252 instead.
	 */
	$characters_over_limit = strlen( $temp_filename ) - 252;
	if ( $characters_over_limit > 0 ) {
		$filename = substr( $filename, 0, -$characters_over_limit );
		return wp_tempnam( $filename, $dir );
	}

	$temp_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;
}