<?php
$format = <<<SQL
CREATE DATABASE IF NOT EXISTS :database;
GRANT ALL PRIVILEGES ON :database_name.* TO ':user'@':host';
SET PASSWORD = PASSWORD(':pass');
SQL;
$args = ["database"=>"people", "user"=>"staff", "pass"=>"pass123", "host"=>"localhost"];
preg_replace_callback("/:(\w+)/", function ($matches) use ($args) {
return @$args[$matches[1]] ?: $matches[0];
}, $format);
/*
Result:
CREATE DATABASE IF NOT EXISTS people;
GRANT ALL PRIVILEGES ON :database_name.* TO 'staff'@'localhost';
SET PASSWORD = PASSWORD('pass123');
The `:database_name` placeholder doesn't exist as a matching key in `$args` so it's returned as is.
This way you know you need to correct the array by adding the "database_name" item.
*/