PHP怎样解析命令行参数 解析命令行参数的5个实用技巧

<?php

if ($argc > 1) {
    for ($i = 1; $i < $argc; $i++) {
        if ($argv[$i] == '-n') {
            if (isset($argv[$i+1])) {
                $name = $argv[$i+1];
                echo "Hello, " . $name . "!\n";
                $i++; // 跳过下一个参数，因为它已经是名字了
            } else {
                echo "Error: -n option requires a name.\n";
                exit(1);
            }
        } else {
            echo "Unknown option: " . $argv[$i] . "\n";
            exit(1);
        }
    }
} else {
    echo "Usage: php my_script.php -n <name>\n";
    exit(1);
}

?>

php my_script.php -n John

Hello, John!

<?php

$options = getopt("n:", ["name:"]);

if (isset($options['n'])) {
    $name = $options['n'];
    echo "Hello, " . $name . "!\n";
} elseif (isset($options['name'])) {
    $name = $options['name'];
    echo "Hello, " . $name . "!\n";
} else {
    echo "Usage: php my_script.php -n <name> or php my_script.php --name <name>\n";
    exit(1);
}

?>

<?php

$options = getopt("vn:", ["name:"]);

$verbose = isset($options['v']);

if (isset($options['n'])) {
    $name = $options['n'];
    echo "Hello, " . $name . "!\n";
} elseif (isset($options['name'])) {
    $name = $options['name'];
    echo "Hello, " . $name . "!\n";
} else {
    echo "Usage: php my_script.php [-v] -n <name> or php my_script.php [-v] --name <name>\n";
    exit(1);
}

if ($verbose) {
    echo "Verbose mode is enabled.\n";
}

?>

composer require symfony/console

<?php

require 'vendor/autoload.php';

use Symfony\Component\Console\Application;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

class GreetCommand extends Command
{
    protected static $defaultName = 'greet';

    protected function configure()
    {
        $this->setDescription('Greets someone')
            ->addArgument('name', InputArgument::REQUIRED, 'Who do you want to greet?')
            ->addOption('loud', 'l', InputOption::VALUE_NONE, 'If set, the task will yell in uppercase letters');
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $name = $input->getArgument('name');
        $loud = $input->getOption('loud');

        if ($loud) {
            $output->writeln('HELLO '.strtoupper($name).'!');
        } else {
            $output->writeln('Hello '.$name.'!');
        }

        return Command::SUCCESS;
    }
}

$application = new Application();
$application->add(new GreetCommand());
$application->run();