ftok

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

ftokConvert a pathname and a project identifier to a System V IPC key

说明

ftok ( string $filename , string $project_id ) : int

The function converts the filename of an existing accessible file and a project identifier into an integer for use with for example shmop_open() and other System V IPC keys.

参数

filename

Path to an accessible file.

project_id

Project identifier. This must be a one character string.

返回值

On success the return value will be the created key value, otherwise -1 is returned.

参见