stream_filter_prepend
Description
bool stream_filter_prepend ( resource stream, string filtername [, int read_write [, mixed params]])Adds filtername to the list of filters attached to stream . This filter will be added with the specified params to the beginning of the list and will therefore be called first during stream operations. To add a filter to the end of the list, use stream_filter_append().
By default, stream_filter_prepend() will attach the filter to the read filter chain if the file was opened for reading (i.e. File Mode: r, and/or +). The filter will also be attached to the write filter chain if the file was opened for writing (i.e. File Mode: w, a, and/or +). STREAM_FILTER_READ , STREAM_FILTER_WRITE , and/or STREAM_FILTER_ALL can also be passed to the read_write parameter to override this behavior. See stream_filter_append() for an example of using this parameter.
When using custom (user) filters: stream_filter_register() must be called first in order to register the desired user filter to filtername .
See also stream_filter_register(), and stream_filter_append()
