Semaphore Functions
PHP Manual

shm_has_var

Check whether a specific entry exists

Description

bool shm_has_var ( resource $shm_identifier , int $variable_key )

Checks whether a specific key exists inside a shared memory segment.

Parameters

shm_identifier

Shared memory segment, obtained from shm_attach.

variable_key

The variable key.

Return Values

Returns TRUE if the entry exists, otherwise FALSE

See Also

  • shm_get_var
  • shm_put_var