PHP Flag

Generic PHP command line flags parse library

Github: php-toolkit/pflag

Features

• Generic command line options and arguments parser.
• Support set value data type(int,string,bool,array), will auto format input value.
• Support set multi alias names for an option.
• Support set multi short names for an option.
• Support set default value for option/argument.
• Support read flag value from ENV var.
• Support set option/argument is required.
• Support set validator for check input value.
• Support auto render beautiful help message.

Flag Options:

• Options start with - or --, and the first character must be a letter
• Support long option. eg: --long --long value
• Support short option. eg: -s -a value
• Support define array option
  • eg: --tag php --tag go will get tag: [php, go]

Flag Arguments:

• Support binding named arguemnt
• Support define array argument

Quick build command

• Use Toolkit\PFlag\CliCmd to quickly build a simple command application
• Use Toolkit\PFlag\CliApp to quickly build a command application that supports subcommands

Install

• Require PHP 8.0+

composer

composer require toolkit/pflag

---

Flags Usage

Flags - is an cli flags(options&argument) parser and manager.

example codes please see example/flags-demo.php

Create Flags

use Toolkit\PFlag\Flags;
require dirname(DIR) . '/test/bootstrap.php';
$flags = $_SERVER['argv'];
// NOTICE: must shift first element.
$scriptFile = array_shift($flags);
$fs = Flags::new();
// can with some config
$fs->setScriptFile($scriptFile);
/** @see Flags::$settings */
$fs->setSettings([
'descNlOnOptLen' => 26
]);
// ...

Define options

Examples for add flag option define:

use Toolkit\PFlag\Flag\Option;
use Toolkit\PFlag\FlagType;
use Toolkit\PFlag\Validator\EnumValidator;
// add options
// - quick add
$fs->addOpt('age', 'a', 'this is a int option', FlagType::INT);
// - use string rule
$fs->addOptByRule('name,n', 'string;this is a string option;true');
// - use array rule
/** @see Flags::DEFINE_ITEM for array rule */
$fs->addOptByRule('name-is-very-lang', [
'type'   => FlagType::STRING,
'desc'   => 'option name is to lang, desc will print on newline',
'shorts' => ['d','e','f'],
// TIP: add validator limit input value.
'validator' => EnumValidator::new(['one', 'two', 'three']),
]);
// -- add multi option at once.
$fs->addOptsByRules([
'tag,t' => 'strings;array option, allow set multi times',
'f'     => 'bool;this is an bool option',
]);
// - use Option
$opt = Option::new('str1', "this is  string option, \ndesc has multi line, \nhaha...");
$opt->setDefault('defVal');
$fs->addOption($opt);

Define Arguments

Examples for add flag argument define:

use Toolkit\PFlag\Flag\Argument;
use Toolkit\PFlag\FlagType;
// add arguments
// - quick add
$fs->addArg('strArg1', 'the is string arg and is required', 'string', true);
// - use string rule
$fs->addArgByRule('intArg2', 'int;this is a int arg and with default value;no;89');
// - use Argument object
$arg = Argument::new('arrArg');
// OR $arg->setType(FlagType::ARRAY);
$arg->setType(FlagType::STRINGS);
$arg->setDesc("this is an array arg,\n allow multi value,\n must define at last");
$fs->addArgument($arg);

Parse Input

use Toolkit\PFlag\Flags;
use Toolkit\PFlag\FlagType;
// ...
if (!$fs->parse($flags)) {
// on render help
return;
}
vdump($fs->getOpts(), $fs->getArgs());

Show help

$ php example/flags-demo.php --help

Output:

Run demo:

$ php example/flags-demo.php --name inhere --age 99 --tag go -t php -t java -d one -f arg0 80 arr0 arr1

Output:

# options
array(6) {
  ["str1"]=> string(6) "defVal"
  ["name"]=> string(6) "inhere"
  ["age"]=> int(99)
  ["tag"]=> array(3) {
    [0]=> string(2) "go"
    [1]=> string(3) "php"
    [2]=> string(4) "java"
  }
  ["name-is-very-lang"]=> string(3) "one"
  ["f"]=> bool(true)
}
arguments
array(3) {
[0]=> string(4) "arg0"
[1]=> int(80)
[2]=> array(2) {
[0]=> string(4) "arr0"
[1]=> string(4) "arr1"
}
}

---

Get Value

Get flag value is very simple, use method getOpt(string $name) getArg($nameOrIndex).

TIP: Will auto format input value by define type.

Options

$force = $fs->getOpt('f'); // bool(true)
$age  = $fs->getOpt('age'); // int(99)
$name = $fs->getOpt('name'); // string(inhere)
$tags = $fs->getOpt('tags'); // array{"php", "go", "java"}

Arguments

$arg0 = $fs->getArg(0); // string(arg0)
// get an array arg
$arrArg = $fs->getArg(1); // array{"arr0", "arr1"}
// get value by name
$arrArg = $fs->getArg('arrArg'); // array{"arr0", "arr1"}

---

Build simple cli app

In the pflag, built in CliApp and CliCmd for quick create and run an simple console application.

Create simple alone command

Build and run a simple command handler. see example file example/clicmd.php

use Toolkit\Cli\Cli;
use Toolkit\PFlag\CliCmd;
use Toolkit\PFlag\FlagsParser;
CliCmd::new()
->config(function (CliCmd $cmd) {
$cmd->name = 'demo';
$cmd->desc = 'description for demo command';
    // config flags
    $cmd->options = [
        'age, a'  => 'int;the option age, is int',
        'name, n' => 'the option name, is string and required;true',
        'tags, t' => 'array;the option tags, is array',
    ];
    // or use property
    // $cmd->arguments = [...];
})
->withArguments([
    'arg1' => 'this is arg1, is string'
])
->setHandler(function (FlagsParser $fs) {
    Cli::info('options:');
    vdump($fs->getOpts());
    Cli::info('arguments:');
    vdump($fs->getArgs());
})
->run();

Usage:

# show help
php example/clicmd.php -h
# run command
php example/clicmd.php --age 23 --name inhere value1

• Display help:

• Run command:

Create an multi commands app

Create an multi commands application, run subcommand. see example file example/cliapp.php

use Toolkit\Cli\Cli;
use Toolkit\PFlag\CliApp;
use Toolkit\PFlag\FlagsParser;
use Toolkit\PFlagTest\Cases\DemoCmdHandler;
$app = new CliApp();
$app->add('test1', fn(FlagsParser $fs) => vdump($fs->getOpts()), [
'desc'    => 'the test 1 command',
'options' => [
'opt1' => 'opt1 for command test1',
'opt2' => 'int;opt2 for command test1',
],
]);
$app->add('test2', function (FlagsParser $fs) {
Cli::info('options:');
vdump($fs->getOpts());
Cli::info('arguments:');
vdump($fs->getArgs());
}, [
// 'desc'    => 'the test2 command',
'options' => [
'opt1' => 'a string opt1 for command test2',
'opt2' => 'int;a int opt2 for command test2',
],
'arguments' => [
'arg1' => 'required arg1 for command test2;true',
]
]);
// fn - required php 7.4+
$app->add('show-err', fn() => throw new RuntimeException('test show exception'));
$app->addHandler(DemoCmdHandler::class);
$app->run();

Usage:

# show help
php example/cliapp.php -h
# run command
php example/cliapp.php test2 --opt1 val1 --opt2 23 value1

• Display commands:

• Command help:

• Run command:

---

Flag rule

The options/arguments rules. Use rule can quick define an option or argument.

• string value is rule(type;desc;required;default;shorts).
• array is define item SFlags::DEFINE_ITEM
• supported type see FlagType::*

use Toolkit\PFlag\FlagType;
$rules = [
// v: only value, as name and use default type FlagType::STRING
// k-v: key is name, value can be string|array
'long,s',
// name => rule
'long,a,b' => 'int', // long is option name, a and b is shorts.
'f'      => FlagType::BOOL,
'str1'   => ['type' => 'int', 'desc' => 'an string option'],
'tags'   => 'array', // can also: ints, strings
'name'   => 'type;the description message;required;default', // with desc, default, required
]

For options

• option allow set shorts

TIP: name long,a,b - long is the option name. remaining a,b is short names.

For arguments

• argument no alias/shorts
• array value only allow defined at last

Definition item

The const Flags::DEFINE_ITEM:

public const DEFINE_ITEM = [
    'name'      => '',
    'desc'      => '',
    'type'      => FlagType::STRING,
    'helpType'  => '', // use for render help
    // 'index'    => 0, // only for argument
    'required'  => false,
    'default'   => null,
    'shorts'    => [], // only for option
    // value validator
    'validator' => null,
    // 'category' => null
];

---

Custom settings

Settings for parse

    // -------------------- settings for parse option --------------------
/**
 * Stop parse option on found first argument.
 *
 * - Useful for support multi commands. eg: `top --opt ... sub --opt ...`
 *
 * @var bool
 */
protected $stopOnFistArg = true;

/**
 * Skip on found undefined option.
 *
 * - FALSE will throw FlagException error.
 * - TRUE  will skip it and collect as raw arg, then continue parse next.
 *
 * @var bool
 */
protected $skipOnUndefined = false;

// -------------------- settings for parse argument --------------------

/**
 * Whether auto bind remaining args after option parsed
 *
 * @var bool
 */
protected $autoBindArgs = true;

/**
 * Strict match args number.
 * if exist unbind args, will throw FlagException
 *
 * @var bool
 */
protected $strictMatchArgs = false;

Setting for render help

support some settings for render help

    // -------------------- settings for built-in render help --------------------
/**
 * Auto render help on provide '-h', '--help'
 *
 * @var bool
 */
protected $autoRenderHelp = true;

/**
 * Show flag data type on render help.
 *
 * if False:
 *
 * -o, --opt    Option desc
 *
 * if True:
 *
 * -o, --opt STRING   Option desc
 *
 * @var bool
 */
protected $showTypeOnHelp = true;

/**
 * Will call it on before print help message
 *
 * @var callable
 */
private $beforePrintHelp;

• custom help message renderer

$fs->setHelpRenderer(function (\Toolkit\PFlag\FlagsParser $fs) {
    // render help messages
});

---

Unit tests

phpunit --debug

test with coverage:

phpdbg -dauto_globals_jit=Off -qrr $(which phpunit) --coverage-text
phpdbg -dauto_globals_jit=Off -qrr $(which phpunit) --coverage-clover ./test/clover.info
# use xdebug
phpunit --coverage-clover ./test/clover.info

Project use

Check out these projects, which use https://github.com/php-toolkit/pflag :

• inhere/console Full-featured php command line application library.
• kite Kite is a tool for help development.
• More, please see Packagist

License

MIT