SQLite3::createAggregate
SQLite3::escapeString
SQLite3
PHP Manual

# SQLite3::createFunction

(PHP 5 >= 5.3.0)

SQLite3::createFunction — Registers a PHP function for use as an SQL scalar function

### Descripción

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

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

### Lista de parámetros

`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 negative, then the SQL function may take any number of arguments.

### Valores retornados

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

### Ejemplos

Example #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")'));
?>`

El resultado del ejemplo seria algo similar a:

    string(32) "098f6bcd4621d373cade4e832627b4f6"

SQLite3::createAggregate
SQLite3::escapeString
SQLite3
PHP Manual