CascadiaPHP 2024

Schema::existsInDatabase

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Schema::existsInDatabaseCheck if exists in database

Açıklama

public mysql_xdevapi\Schema::existsInDatabase(): bool

Checks if the current object (schema, table, collection, or view) exists in the schema object.

Bağımsız Değişkenler

Bu işlevin bağımsız değişkeni yoktur.

Dönen Değerler

true if the schema, table, collection, or view still exists in the schema, else false.

Örnekler

Örnek 1 mysql_xdevapi\Schema::existsInDatabase() example

<?php
$session
= mysql_xdevapi\getSession("mysqlx://user:password@localhost");

$session->sql("DROP DATABASE IF EXISTS food")->execute();
$session->sql("CREATE DATABASE food")->execute();
$session->sql("CREATE TABLE food.fruit(name text, rating text)")->execute();

$schema = $session->getSchema("food");
$schema->createCollection("trees");

// ...

$trees = $schema->getCollection("trees");

// ...

// Is this collection still in the database (schema)?
if ($trees->existsInDatabase()) {
echo
"Yes, the 'trees' collection is still present.";
}

Yukarıdaki örnek şuna benzer bir çıktı üretir:

Yes, the 'trees' collection is still present.
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