streamWrapper::stream_read

(PHP 4 >= 4.3.2, PHP 5)

streamWrapper::stream_readRead from stream

Опис

public string streamWrapper::stream_read ( int $count )

This method is called in response to fread() and fgets().

Зауваження:

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

Параметри

count

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

Значення, що повертаються

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.

Помилки/Винятки

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

Зауваження:

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

Примітки

Зауваження:

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

Увага

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.

Прогляньте Також

  • fread() - Binary-safe file read
  • fgets() - Gets line from file pointer

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