WC_Download_Handler::readfile_chunked │ public static │ WC 1.0

Read file chunked.

Reads file in chunks so big downloads are possible without changing PHP.INI - http://codeigniter.com/wiki/Download_helper_for_large_files/.

Method of the class: WC_Download_Handler{}

No Hooks.

Returns

bool. Success or fail

Usage

$result = WC_Download_Handler::readfile_chunked( $file, $start, $length );
$file(string) (required)
File.
$start(int)
Byte offset/position of the beginning from which to read from the file.
$length(int)
Length of the chunk to be read from the file in bytes, 0 means full file.

WC_Download_Handler::readfile_chunked() code WC 11.1.2

woocommerce/includes/class-wc-download-handler.php 
public static function readfile_chunked( $file, $start = 0, $length = 0 ) {
	// Define before attempting to open the file: the constant has always been defined even
	// when the open fails, and external code may rely on that side effect.
	if ( ! defined( 'WC_CHUNK_SIZE' ) ) {
		define( 'WC_CHUNK_SIZE', 1024 * 1024 );
	}

	$handle = @fopen( $file, 'r' ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged, WordPress.WP.AlternativeFunctions.file_system_read_fopen

	if ( false === $handle ) {
		return false;
	}

	if ( ! $length ) {
		$length = (int) @filesize( $file ); // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- Remote paths make filesize error; false is handled by the cast (0 means read until EOF).
	}

	return self::readfile_from_handle( $handle, $start, $length );
}