Unexpected WordPress.WP.AlternativeFunctions.file_system_read_fopen warning

[paulschreiber]

[PHPCS 3.1, WPCS 0.13.1, PHP 5.6.30]

I'm using fopen() with a stream, and WPCS is now flagging this as filesystem usage:

<?php
Header( 'HTTP/1.1 200 OK' );
Header( 'Content-Type: text/csv' );
Header( "Content-Disposition: attachment; filename={$filename}" );

$output_stream = fopen( 'php://output', 'w' );

fputcsv( $output_stream, $output_columns );
foreach ( self::$metadata as $row ) {
	fputcsv( $output_stream, $row );
}

fclose( $output_stream );

I get this error:

File operations should use WP_Filesystem methods instead of direct PHP filesystem calls. Found: fopen()

WP_Filesystem doesn't seem appropriate here.

Do you recommend a different way of writing the above code?

[JDGrimes]

This is related to #295, though that is for a different sniff.

[GaryJones]

Very relevant: #1265 (comment)

[jrfnl]

Closing as fixed by #1655 which was included in WPCS 2.1.0.