CommandLine

A simple command-line options parser.

The main idea was to create a class that will not require any configuration.

A basic usage is to just create a new object and go.

Description

The class parses all arguments passed in $argv. Parsed arguments are easily accessed with class' methods. These methods are documents in CommandLine.php.

A command-line argument can be either an option or a param:

• options have to be passed before params; when the parser encounters the first param, all arguments that come after will be treated as params as well
• an option is an argument starting with a dash - (i.e. -v, -4=yes) or dashes -- (i.e. --enabled, --start=now)
• params start with a first argument not being an option
• the class generally won't filter options, make them required, optional, etc.
• however, the class supports $allowedOptions and $shortOptionsMap (see the class' __construct documentation); they are optional and CommandLine works perfectly well without using them

A developer needs to implement a logic connected with parsed arguments (their meaning, correctness, dependencies, etc.). The class will not take care of these things: its purpose is to be a convenient "reader" of $argv.

Installation

Requirements

• PHP 7

with Composer

composer require jacekciach/commandline

without Composer

Just download CommandLine.php from the repository; this is the only required file.

Then include this file in your code with include or require.

Examples

Example 1.

<?php
require_once __DIR__. '/vendor/autoload.php';

use CommandLine\CommandLine;

$cmd = new CommandLine();
var_export(array(
  "binary"  => $cmd->binary(),  // returns PHP_BINARY
  "script"  => $cmd->script(),  // returns the name of the script
  "options" => $cmd->options(), // returns all "options" passed from command line
  "params"  => $cmd->params(),  // returns all "params" passed from command line
));
echo PHP_EOL;

So a command:

$ php example1.php --start --msg="Hello, World!" file1.txt --book

will return something like:

array (
  'binary' => '/usr/bin/php7.0',
  'script' => 'example1.php',
  'options' => 
  array (
    'start' => true,
    'msg' => 'Hello, World!',
  ),
  'params' => 
  array (
    0 => 'file1.txt',
    1 => '--book'
  ),
)

Example 2.

$ php example2.php --start --msg="Hellow World!" "Test Application" user

<?php
require_once __DIR__. '/vendor/autoload.php';

use CommandLine\CommandLine;

$cmd = new CommandLine();
echo 'start = ' . var_export($cmd->option('start'), true) . PHP_EOL;
echo 'msg   = ' . var_export($cmd->option('msg'), true) . PHP_EOL;
echo 'stop  = ' . var_export($cmd->option('stop'), true) . PHP_EOL; // reading a not existing options will return NULL 
echo PHP_EOL;
echo 'param(0) = ' . var_export($cmd->param(0), true) . PHP_EOL;
echo 'param(1) = ' . var_export($cmd->param(1), true) . PHP_EOL;
echo 'param(2) = ' . var_export($cmd->param(2), true) . PHP_EOL; // reading a not existing param will return NULL

will output:

start = true
msg   = 'Hellow World!'
stop  = NULL

param(0) = 'Application name'
param(1) = 'user'
param(2