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Registers a PHP function for use as an SQL scalar function


SQLite3::createFunction

(PHP 5 >= 5.3.0)

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

Description

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.

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.

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.

Return Values

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

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" 



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