php_user_filter::filter()

(PHP 5, PHP 7)

Called when applying the filter

说明

publicphp_user_filter::filter(resource $in,resource $out,int &$consumed,bool $closing): int

This method is called whenever data is read from or written to the attached stream (such as withfread()orfwrite()).

参数

$in

$inis a resource pointing to abucket brigadewhich contains one or morebucketobjects containing data to be filtered.

$out

$outis a resource pointing to a secondbucket brigadeinto which your modified buckets should be placed.

$consumed

$consumed, which mustalwaysbe declared by reference, should be incremented by the length of the data which your filter reads in and alters. In most cases this means you will increment$consumedby$bucket->datalenfor each$bucket.

$closing

If the stream is in the process of closing (and therefore this is the last pass through the filterchain),the$closingparameter will be set toTRUE.

返回值

Thefilter()method must return one of three values upon completion.