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    shm_has_var

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

    shm_has_var — Check whether a specific entry exists

    Descrizione

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

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

    Elenco dei parametri

    shm

    A shared memory segment obtained from shm_attach().

    key

    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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