streamWrapper
PHP Manual

streamWrapper::stream_read

Read from stream

Description

public string streamWrapper::stream_read ( int $count )

This method is called in response to fread and fgets.

Note:

Remember to update the read/write position of the stream (by the number of bytes that were successfully read).

Parameters

count

How many bytes of data from the current position should be returned.

Return Values

If there are less than count bytes available, return as many as are available. If no more data is available, return either FALSE or an empty string.

Errors/Exceptions

Emits E_WARNING if call to this method fails (i.e. not implemented).

Note:

If the return value is longer then count an E_WARNING error will be emitted, and excess data will be lost.

Notes

Note:

streamWrapper::stream_eof is called directly after calling streamWrapper::stream_read to check if EOF has been reached. If not implemented, EOF is assumed.

Warning

When reading the whole file (for example, with file_get_contents), PHP will call streamWrapper::stream_read followed by streamWrapper::stream_eof in a loop but as long as streamWrapper::stream_read returns a non-empty string, the return value of streamWrapper::stream_eof is ignored.

See Also

  • fread
  • fgets