(PHP 5 >= 5.3.0, PHP 7)
Registers a PHP function for use as an SQL scalar function
public bool SQLite3::createFunction ( string $name, mixed $callback [, int $argument_count = -1 ] )
Registers a PHP function or user-defined function for use as an SQL scalar function for use within SQL statements.
Parameters:
name
Name of the SQL function to be created or redefined.
callback
The name of a PHP function or user-defined function to apply as a callback, defining the behavior of the SQL function.
argument_count
The number of arguments that the SQL function takes. If this parameter is negative, then the SQL function may take any number of arguments.
Returns:
Returns TRUE upon successful creation of the function, FALSE on failure.
Examples:
SQLite3::createFunction() example
<?php
function my_udf_md5($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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