Let's demystify swoole : tables

Introduction

Swoole provide a table system based on memory.

These tables are stored in memory with very high speed access and accessible to every thread and processes.

Creating your first table

To create table, use Swoole\Table object :

$members = new Swoole\Table(500);

The parameter represent max entries managed by table. Adjust the size to avoid using too much memory.

We will now declare fields :

$members->column('firstname', Swoole\Table::TYPE_STRING);
$members->column('lastname', Swoole\Table::TYPE_STRING);

And create the table :

$members->create();

Insert/update data

We can now use the table.

Use set method to persist records :

foreach ([
    ['firstname' => 'john', 'lastname' => 'doe'],
    ['firstname' => 'paul', 'lastname' => 'carbon']
] as $key => $record) {
    $members->set($key, $record);
}

And same for update :

$members->set(0, ['firstname' => 'john the second', 'lastname' => 'doe']);

Getting data

You can access data from key :

$key = 0;
$member = $members->get($key);

And if you need only one field :

$key = 0;
$field = 'firstname';
$firstname = $members->get($key, $field);

You can also iterate all records with foreach :

foreach ($members as $key => $record) {
    echo 'member #' . $key . ' : ' . $record['firstname'] . ' ' . $record['lastname'];
}

Delete a record

To remove a record, use :

$key = 0;
$members->del($key);

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