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streamWrapper::stream_seek

(PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8)

streamWrapper::stream_seek — Seeks to specific location in a stream

Beschreibung

public streamWrapper::stream_seek(int $offset, int $whence): bool

This method is called in response to fseek().

The read/write position of the stream should be updated according to the offset and whence.

Parameter-Liste

offset

The stream offset to seek to.

whence

Possible values:

  • SEEK_SET - Set position equal to offset bytes.
  • SEEK_CUR - Set position to current location plus offset.
  • SEEK_END - Set position to end-of-file plus offset.

Hinweis: The current implementation never sets whence to SEEK_CUR; instead such seeks are internally converted to SEEK_SET seeks.

Rückgabewerte

Return true if the position was updated, false otherwise.

Anmerkungen

Hinweis:

If not implemented, false is assumed as the return value.

Hinweis:

Upon success, streamWrapper::stream_tell() is called directly after calling streamWrapper::stream_seek(). If streamWrapper::stream_tell() fails, the return value to the caller function will be set to false.

Hinweis:

Not all seeks operations on the stream will result in this function being called. PHP streams have read buffering enabled by default (see also stream_set_read_buffer()) and seeking may be done by merely moving the buffer pointer.

Siehe auch