(PHP 5 >= 5.3.0, PHP 7)
SQLite3::createFunction — Registers a PHP function for use as an SQL scalar function
$name
, mixed $callback
[, int $argument_count
= -1
[, int $flags
= 0
]] ) : boolRegisters a PHP function or user-defined function for use as an SQL scalar function for use within SQL statements.
name
Name of the SQL function to be created or redefined.
callback
The name of a PHP function or user-defined function to apply as a callback, defining the behavior of the SQL function.
This function need to be defined as:
value1
The first argument passed to the SQL function.
...
Further arguments passed to the SQL function.
argument_count
The number of arguments that the SQL function takes. If this parameter is -1, then the SQL function may take any number of arguments.
flags
A bitwise conjunction of flags. Currently, only
SQLITE3_DETERMINISTIC
is supported, which specifies
that the function always returns the same result given the same inputs
within a single SQL statement.
Returns TRUE
upon successful creation of the function, FALSE
on failure.
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7.1.4 |
The flags parameter has been added.
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Example #1 SQLite3::createFunction() example
<?php
function my_udf_md5($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")'));
?>
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string(32) "098f6bcd4621d373cade4e832627b4f6"