瞰赽 1. Reading shared memory block

boolean value. TRUE if support for reading GIF images is included.

ע As of PHP 4.1.1, this file reading functionality has the following restrictions

Open text file for reading. The stream is positioned at the beginning of the file.

'r' Open for reading only place the file pointer at the beginning of the file.

Open text file for reading and writing. The stream is positioned at the beginning of the file.

File reading is not subject to any safe mode or open basedir restrictions. This is fixed in PHP 4.2.0.

Opens a new zip archive for reading. The filename parameter is the filename of the zip archive to open.

The internal position of the stream is advanced by the number of bytes that were read, so that subsequent reads will continue reading from that point.

Open text file for reading and writing. The file is created if it does not exist, otherwise it is truncated. The stream is positioned at the beginning of the file.

If you are experiencing problems with reading and writing to files and you're using the server module version of PHP, remember to make sure that the files and directories you're using are accessible to the server process.

If the file is opened for reading, this function is emulated but can be extremely slow. If the file is opened for writing, only forward seeks are supported gzseek then compresses a sequence of zeroes up to the new starting position.