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Code Reference Functions bp_document_readfile_chunked()

bp_document_readfile_chunked( string $file, int $start, int $length )

Read file chunked.

Description

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

Parameters

$file

(string) (Required) File.

$start

(int) (Required) Byte offset/position of the beginning from which to read from the file.

$length

(int) (Required) Length of the chunk to be read from the file in bytes, 0 means full file.

Return

(bool) Success or fail

Source

File: bp-document/bp-document-filters.php 

function bp_document_readfile_chunked( $file, $start = 0, $length = 0 ) {
	if ( ! defined( 'BP_DOCUMENT_CHUNK_SIZE' ) ) {
		define( 'BP_DOCUMENT_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 = @filesize( $file ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
	}

	$read_length = (int) BP_DOCUMENT_CHUNK_SIZE;

	if ( $length ) {
		$end = $start + $length - 1;

		@fseek( $handle, $start ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
		$p = @ftell( $handle ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged

		while ( ! @feof( $handle ) && $p <= $end ) { // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
			// Don't run past the end of file.
			if ( $p + $read_length > $end ) {
				$read_length = $end - $p + 1;
			}

			echo @fread( $handle, $read_length ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged, WordPress.XSS.EscapeOutput.OutputNotEscaped, WordPress.WP.AlternativeFunctions.file_system_read_fread
			$p = @ftell( $handle ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged

			if ( ob_get_length() ) {
				ob_flush();
				flush();
			}
		}
	} else {
		while ( ! @feof( $handle ) ) { // @codingStandardsIgnoreLine.
			echo @fread( $handle, $read_length ); // @codingStandardsIgnoreLine.
			if ( ob_get_length() ) {
				ob_flush();
				flush();
			}
		}
	}

	return @fclose( $handle ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged, WordPress.WP.AlternativeFunctions.file_system_read_fclose
}

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Changelog

Changelog
Version Description
BuddyBoss 1.4.1 Introduced.

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