Sets a callback that decides whether SQLite may perform specific statement operations.
The objective is to understand the behavior and operational limits, not only the method name.
What It Does
Sets a callback that decides whether SQLite may perform specific statement operations.
Syntax and Return Value
Pdo\Sqlite::setAuthorizer(...)The return value and exceptional cases depend on the call described here: Available from PHP 8.5; callback authorization is checked at preparation time, not a substitute for SQL parameter binding.
Requirements: install and enable the corresponding PHP driver or extension and configure the service before running the examples.
Version requirement: PHP 8.5 or later, with the SQLite PDO driver.
The driver-specific PDO subclasses are available starting with PHP 8.4, except setAuthorizer, which starts with PHP 8.5.
Example 1: Basic Use
PHP 8.5+ is required. The SQLite3 action constants and exact callback permissions depend on the SQLite build.
<?php
$sqlite = PDO::connect("sqlite::memory:");
if (PHP_VERSION_ID < 80500) { throw new RuntimeException("Requires PHP 8.5+"); }
$sqlite->setAuthorizer(static function (int $action): int {
return $action === SQLite3::DELETE ? Pdo\Sqlite::DENY : Pdo\Sqlite::OK;
});
echo "Authorizer installed";Example 2: A Second Scenario
PHP 8.5+ is required. The SQLite3 action constants and exact callback permissions depend on the SQLite build. This additional check distinguishes the method's result from connection or statement state.
<?php
$sqlite = PDO::connect("sqlite::memory:");
if (PHP_VERSION_ID < 80500) { throw new RuntimeException("Requires PHP 8.5+"); }
$sqlite->setAuthorizer(static function (int $action): int {
return $action === SQLite3::DELETE ? Pdo\Sqlite::DENY : Pdo\Sqlite::OK;
});
echo "Authorizer installed";
$sqlite->setAuthorizer(null);
echo "Authorizer cleared";Example 3: Practical Checks
PHP 8.5+ is required. The SQLite3 action constants and exact callback permissions depend on the SQLite build. This additional check distinguishes the method's result from connection or statement state.
<?php
$sqlite = PDO::connect("sqlite::memory:");
if (PHP_VERSION_ID < 80500) { throw new RuntimeException("Requires PHP 8.5+"); }
$sqlite->setAuthorizer(static function (int $action): int {
return $action === SQLite3::DELETE ? Pdo\Sqlite::DENY : Pdo\Sqlite::OK;
});
echo "Authorizer installed";
$sqlite->setAuthorizer(static fn(int $action): int => Pdo\Sqlite::OK);
echo "Read/write operations allowed by callback";Important Behavior and Edge Cases
Available from PHP 8.5; callback authorization is checked at preparation time, not a substitute for SQL parameter binding.
For production use, also account for error handling, data validation, resource limits and environment-specific driver behavior.
Comparison with Related Approaches
| Approach | Important distinction |
|---|---|
| Pdo\Sqlite::setAuthorizer | Sets a callback that decides whether SQLite may perform specific statement operations. |
| Related API / pattern | Prepared statements separate values from SQL, while an authorizer restricts SQL operations. |
Common Beginner Mistakes
| Mistake | Correct approach |
|---|---|
| Assuming the happy path covers edge cases | Available from PHP 8.5; callback authorization is checked at preparation time, not a substitute for SQL parameter binding. |
| Using a related API interchangeably | Prepared statements separate values from SQL, while an authorizer restricts SQL operations. |
Key Takeaways
- Sets a callback that decides whether SQLite may perform specific statement operations.
- Available from PHP 8.5; callback authorization is checked at preparation time, not a substitute for SQL parameter binding.
- Prepared statements separate values from SQL, while an authorizer restricts SQL operations.
Choose this API or pattern when its exact semantics match your task, and verify the result against the database driver and runtime used by your application.