- str_repeat: documentation ( source)
- join: documentation ( source)
<?php
$character_map = array(',', '/', '(', ')', ' ', '-', ':', '__');
$replace_values = str_repeat('REPLACE(', count($character_map));
$replace_parts = '), ' . join("', '_'), '", $character_map);
print $replace_values . "\n\n";
print $replace_parts . "\n";