## Uso básico

Ejemplo #1 Resumen de las operaciones con Memoria Compartida

    <?php

    // Crear un segmento de memoria compartida de 100 bytes con un identificador igual a 0xff3
    $shm_id = shmop_open(0xff3, "c", 0644, 100);
    if (!$shm_id) {
        echo "Couldn't create shared memory segment\n";
    }

    // Obtener tamaño del segmento de memoria compartida
    $shm_size = shmop_size($shm_id);
    echo "SHM Block Size: " . $shm_size . " has been created.\n";

    // Escribir una cadena de prueba en la memoria compartida
    $shm_bytes_written = shmop_write($shm_id, "my shared memory block", 0);
    if ($shm_bytes_written != strlen("my shared memory block")) {
        echo "Couldn't write the entire length of data\n";
    }

    // Ahora vamos a leer la cadena de texto
    $my_string = shmop_read($shm_id, 0, $shm_size);
    if (!$my_string) {
        echo "Couldn't read from shared memory block\n";
    }
    echo "The data inside shared memory was: " . $my_string . "\n";

    //Ahora vamos a eliminar y cerrar el segmento de memoria compartida
    if (!shmop_delete($shm_id)) {
        echo "Couldn't mark shared memory block for deletion.";
    }
    shmop_close($shm_id);

    ?>

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