yii2.0安装失败 [ 2.0 版本 ]

按照这个教程来的输入链接说明，我旁边的一个同事也是照着这个来的，一次就成功了，偏偏我的不行，第一步下载就出错了，下面是错误代码

E:\WWW\upupwapache\vhosts\test.test.com>php -r "readfile('https://getcomposer.or
g/installer');" | php
 version to install instead of the latest
--filename="..."     accepts a target filename (default: composer.phar)
--disable-tls        disable SSL/TLS security for file downloads
--cafile="..."       accepts a path to a Certificate Authority (CA) certificate
file for SSL/TLS verification

EOF;
}

/**
 * check the platform for possible issues on running composer
 */
function checkPlatform($quiet, $disableTls)
{
    $errors = array();
    $warnings = array();

    $iniPath = php_ini_loaded_file();
    $displayIniMessage = false;
    if ($iniPath) {
        $iniMessage = PHP_EOL.PHP_EOL.'The php.ini used by your command-line PHP
 is: ' . $iniPath;
    } else {
        $iniMessage = PHP_EOL.PHP_EOL.'A php.ini file does not exist. You will h
ave to create one.';
    }
    $iniMessage .= PHP_EOL.'If you can not modify the ini file, you can also run
 `php -d option=value` to modify ini values on the fly. You can use -d multiple
times.';

    if (ini_get('detect_unicode')) {
        $errors['unicode'] = 'On';
    }

    if (extension_loaded('suhosin')) {
        $suhosin = ini_get('suhosin.executor.include.whitelist');
        $suhosinBlacklist = ini_get('suhosin.executor.include.blacklist');
        if (false === stripos($suhosin, 'phar') && (!$suhosinBlacklist || false
!== stripos($suhosinBlacklist, 'phar'))) {
            $errors['suhosin'] = $suhosin;
        }
    }

    if (!function_exists('json_decode')) {
        $errors['json'] = true;
    }

    if (!extension_loaded('Phar')) {
        $errors['phar'] = true;
    }

    if (!extension_loaded('filter')) {
        $errors['filter'] = true;
    }

    if (!extension_loaded('hash')) {
        $errors['hash'] = true;
    }

    if (!ini_get('allow_url_fopen')) {
        $errors['allow_url_fopen'] = true;
    }

    if (extension_loaded('ionCube Loader') && ioncube_loader_iversion() < 40009)
 {
        $errors['ioncube'] = ioncube_loader_version();
    }

    if (version_compare(PHP_VERSION, '5.3.2', '<')) {
        $errors['php'] = PHP_VERSION;
    }

    if (version_compare(PHP_VERSION, '5.3.4', '<')) {
        $warnings['php'] = PHP_VERSION;
    }

    if (!extension_loaded('openssl') && true === $disableTls) {
        $warnings['openssl'] = true;
    } elseif (!extension_loaded('openssl')) {
        $errors['openssl'] = true;
    }

    if (!defined('HHVM_VERSION') && !extension_loaded('apcu') && ini_get('apc.en
able_cli')) {
        $warnings['apc_cli'] = true;
    }

    ob_start();
    phpinfo(INFO_GENERAL);
    $phpinfo = ob_get_clean();
    if (preg_match('{Configure Command(?: *</td><td class="v">| *=> *)(.*?)(?:</
td>|$)}m', $phpinfo, $match)) {
        $configure = $match[1];

        if (false !== strpos($configure, '--enable-sigchild')) {
            $warnings['sigchild'] = true;
        }

        if (false !== strpos($configure, '--with-curlwrappers')) {
            $warnings['curlwrappers'] = true;
        }
    }

    if (!empty($errors)) {
        out("Some settings on your machine make Composer unable to work properly
.", 'error');

        out('Make sure that you fix the issues listed below and run this script
again:', 'error');
        foreach ($errors as $error => $current) {
            switch ($error) {
                case 'json':
                    $text = PHP_EOL."The json extension is missing.".PHP_EOL;
                    $text .= "Install it or recompile php without --disable-json
";
                    break;

                case 'phar':
                    $text = PHP_EOL."The phar extension is missing.".PHP_EOL;
                    $text .= "Install it or recompile php without --disable-phar
";
                    break;

                case 'filter':
                    $text = PHP_EOL."The filter extension is missing.".PHP_EOL;
                    $text .= "Install it or recompile php without --disable-filt
er";
                    break;

                case 'hash':
                    $text = PHP_EOL."The hash extension is missing.".PHP_EOL;
                    $text .= "Install it or recompile php without --disable-hash
";

E:\WWW\upupwapache\vhosts\test.test.com>

好像是直接打开了，但是并没有下载，然后我又去下载了一个composer.phar放在了目录下，然后去执行第二步准备所有插件，还是不行

E:\WWW\upupwapache\vhosts\test.test.com>php composer.phar global require "fxp/co
mposer-asset-plugin:1.0.0"
Changed current directory to C:/Users/Administrator/AppData/Roaming/Composer
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)



  [RuntimeException]
  Could not load package fxp/composer-asset-plugin in http://packagist.org: [
  UnexpectedValueException] Could not parse version constraint ^1.0: Invalid
  version string "^1.0"






  [UnexpectedValueException]
  Could not parse version constraint ^1.0: Invalid version string "^1.0"



require [--dev] [--prefer-source] [--prefer-dist] [--no-progress] [--no-update]
[packages1] ... [packagesN]



E:\WWW\upupwapache\vhosts\test.test.com>

我现在再用我那个同事安装好的文件，但是我想知道我的为什么装不了，都是一步一步来的，我们俩用的环境都是一样的，而且他并没有配环境变量