SQLite3::createFunction

(PHP 5 >= 5.3.0, PHP 7)

SQLite3::createFunctionRegisters a PHP function for use as an SQL scalar function

Описание

public bool SQLite3::createFunction ( string $name , mixed $callback [, int $argument_count = -1 [, int $flags = 0 ]] )

Registers a PHP function or user-defined function for use as an SQL scalar function for use within SQL statements.

Список параметров

name

Name of the SQL function to be created or redefined.

callback

The name of a PHP function or user-defined function to apply as a callback, defining the behavior of the SQL function.

argument_count

The number of arguments that the SQL function takes. If this parameter is -1, then the SQL function may take any number of arguments.

flags

A bitwise conjunction of flags. Currently, only SQLITE3_DETERMINISTIC is supported, which specifies that the function always returns the same result given the same inputs within a single SQL statement.

Возвращаемые значения

Returns TRUE upon successful creation of the function, FALSE on failure.

Список изменений

Версия Описание
PHP 7.1.4 The flags has been added.

Примеры

Пример #1 SQLite3::createFunction() example

<?php
function my_udf_md5($string) {
    return 
md5($string);
}

$db = new SQLite3('mysqlitedb.db');
$db->createFunction('my_udf_md5''my_udf_md5');

var_dump($db->querySingle('SELECT my_udf_md5("test")'));
?>

Результатом выполнения данного примера будет что-то подобное:

string(32) "098f6bcd4621d373cade4e832627b4f6"