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PHP Manual || SQLite3

(PHP 5 >= 5.3.0, PHP 7)

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

Description

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

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

Parameters

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.

This function need to be defined as:

callback ( mixed $value1 [, mixed $... ] ) : mixed
value1

The first argument passed to the SQL function.

...

Further arguments passed to 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.

Return Values

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

Changelog

Version Description
7.1.4 The flags parameter has been added.

Examples

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")'));
?>

The above example will output something similar to:

string(32) "098f6bcd4621d373cade4e832627b4f6"



PHP Manual || SQLite3