Convert PHP array to YAML

array2yaml.php

#!/usr/local/bin/php
<?php
/*
 * CLI to convert a PHP array to a YAML file.
 */

error_reporting(E_ALL ^ E_NOTICE);
date_default_timezone_set('UTC');
require_once 'vendor/autoload.php';

if (php_sapi_name() !== 'cli') {
    echo "This script must be run from the command line.\n";
    exit(1);
}

use Symfony\Component\Yaml\Yaml;

if (!isset($argv[1]) || $argv[1] == 'help') {
    echo <<<EOT
Converts a PHP array to a YAML file.

Usage:
  php array2yaml.php <input> [<output>]

Arguments:
  input   Input file name (required, string)
  output  Output file name (optional, string, default: <input>.yml)
EOT;
    exit(0);
}

$input = (string) $argv[1];
$output = pathinfo($input)['filename'] . '.yml';
if (isset($argv[2])) {
    $output = (string) $argv[2];
}

try {
    is_file($input) or throw new \Exception("File \"$input\" does not exist");
    $array = include($input);
    file_put_contents($output, Yaml::dump($array, 99, 2));
    echo "Success: file \"$output\" created\n";
    exit(0);
} catch (\Exception $e) {
    echo 'Error: ',  $e->getMessage(), "\n";
    exit(1);
}

composer.json

{
    "require": {
        "symfony/yaml": "^7.3"
    }
}

Exactly what I was looking for. Thanks for this.

Updated to symfony/yaml 7.3 + better CLI