(PHP 5 >= 5.3.0, PHP 7, PHP 8)

shm_has_varCheck whether a specific entry exists


shm_has_var(SysvSharedMemory $shm, int $key): bool

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

Elenco dei parametri


A shared memory segment obtained from shm_attach().


The variable key.

Valori restituiti

Returns true if the entry exists, otherwise false

Log delle modifiche

Versione Descrizione
8.0.0 shm expects a SysvSharedMemory instance now; previously, a resource was expected.

Vedere anche:

  • shm_get_var() - Restituisce una variabile dalla memoria condivisa
  • shm_put_var() - Inserisce o aggiorna una variabile nella memoria condivisa

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