SQLite3::exec

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

SQLite3::exec — Executes a result-less query against a given database

Descrizione

public SQLite3::exec(string $query): bool

Executes a result-less query against a given database.

Nota: SQLite3 may need to create » temporary files during the execution of queries, so the respective directories may have to be writable.

Elenco dei parametri

query: The SQL query to execute (typically an INSERT, UPDATE, or DELETE query).

Valori restituiti

Returns true if the query succeeded, false on failure.

Esempi

Example #1 SQLite3::exec() example

<?php
$db = new SQLite3('mysqlitedb.db');

$db->exec('CREATE TABLE bar (bar TEXT)');
?>

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User Contributed Notes 2 notes

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alexandre dot schmidt at gmail dot com ¶

8 years ago

I was getting "database locked" all the time until I found out some features of sqlite3 must be set by using SQL special instructions (i.e. using PRAGMA keyword). For instance, what apparently solved my problem with "database locked" was to set journal_mode to 'wal' (it is defaulting to 'delete', as stated here: https://www.sqlite.org/wal.html (see Activating  And Configuring WAL Mode)).

So basically what I had to do was creating a connection to the database and setting journal_mode with the SQL statement. Example:

<?php
$db = new SQLite3('/my/sqlite/file.sqlite3');
$db->busyTimeout(5000);
// WAL mode has better control over concurrency.
// Source: https://www.sqlite.org/wal.html
$db->exec('PRAGMA journal_mode = wal;');
?>

Hope that helps.

down

synnus ¶

2 years ago

<?php
       $db->exec('PRAGMA journal_mode = wal;');
       $db->exec('PRAGMA synchronous = NORMAL;');
       $db->exec('PRAGMA schema.taille_cache = 16000;');
?>

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