ftok
PHP function
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(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
Convert a pathname and a project identifier to a System V IPC key
Description
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.
Parameters
filenamePath to an accessible file.
project_idProject identifier. This must be a one character string.
Return Values
On success the return value will be the created key value, otherwise -1 is returned.