Find and replace double curly braces in PHP, example: findReplace("Hello, {{ name }}", "name", "John"); // "Hello, John" Raw

findReplace.php

<?php

/**
 * Parses a template argument to the specified value
 * Template variables are defined using double curly brackets: {{ [a-zA-Z] }}
 * Returns the query back once the instances has been replaced
 * @param string $string
 * @param string $find
 * @param string $replace
 * @return string
 * @throws \Exception
 */
function findReplace($string, $find, $replace)
{
    if (preg_match("/[a-zA-Z\_]+/", $find)) {
        return (string) preg_replace("/\{\{(\s+)?($find)(\s+)?\}\}/", $replace, $string);
    } else {
        throw new \Exception("Find statement must match regex pattern: /[a-zA-Z]+/");
    }
}