1.项目安装debug工具

php composer.phar require --prefer-dist yiisoft/yii2-debug

2.配置web/index.php

defined('YII_DEBUG') or define('YII_DEBUG', true);defined('YII_ENV') or define('YII_ENV', 'dev');

3.配置config/web.php

if(file_exists(__DIR__ . "/web-local.php")) {    $localConfig = require __DIR__ . "/web-local.php";    $config = ArrayHelper::merge($config, $localConfig);}

（相关教程推荐：yii框架）

4.增加web-local.php

<?php $localConfig = [    'components' => [        'log' => [            'traceLevel' => YII_DEBUG ? 3 : 0,            'targets' => [                [                    'class' => 'yii\log\FileTarget',                    'levels' => ['error', 'warning'],                ],            ],        ],    ],]; if (YII_ENV_DEV) {    // configuration adjustments for 'dev' environment    $localConfig['bootstrap'][] = 'debug';    $localConfig['modules']['debug'] = [        'class' => 'yii\debug\Module',        // uncomment the following to add your IP if you are not connecting from localhost.        //'allowedIPs' => ['127.0.0.1', '::1'],        'allowedIPs' => ['*'],    ];     $localConfig['bootstrap'][] = 'gii';    $localConfig['modules']['gii'] = [        'class' => 'yii\gii\Module',        // uncomment the following to add your IP if you are not connecting from localhost.        //'allowedIPs' => ['127.0.0.1', '::1'],    ];} return $localConfig;

5.设置runtime目录为可读写

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