Programmer Group

1. Advanced application of PHP objects final keyword Final means "final" and "final"; The classes and methods modified by final are the "final version"; If there is a method, the format is: final class class name{ //... } Indicates that this class is no longer inherited and cannot have subclasses; If there ...

php+mysql to achieve a simple library management system ps: the front-end page design is a little ugly. I'll make do with it. Ha ha ha. It does not have user and administrator functions. If you want to realize it, you only need to selectively use the function of the home page according to the account information in the database. Database relat ...

Environment construction The vulnerability is in the version before yii2.0.38. Download version 2.0.37basic https://github.com/yiisoft/yii2/releases/tag/2.0.37 Modify the value of the / config/web file Enter php yii serve in the current directory to start Reappearance Construct the deserialization entry first Create a new contro ...

Let's first determine the most basic functions of the container. First, the container needs to be able to store and extract objects.The objects in the container can be managed uniformly in an array. The class name can be used as the key, the object as the value, and the object can be stored in the array.When extracting an object, you only need ...

web151 front bypass Simply change exts:png to php on the front end exts:'php' visit /upload/shell.php?shell=system("tac ../flag.php"); Web152 content type bypass Instead of changing the front end this time, change the content type directly in bp to image/png Summarize the common content type types Common media format types are ...

What is SQL injection The first is the security vulnerability in the database layer of the Web program, which is the simplest vulnerability in the website.The main reason is that the program does not judge the legitimacy of the user input data, so that the attacker can add additional SQL statements to the pre-defined SQL statements in the Web ...

1 reproduction environment PHP 5.6 Decmsv5.7sp2 official version (January 9, 2018) Reproduction process According to gourd painting ladle, water a blog. First download the source code of this version, and then unzip it. See the construction process for details This article After the installation, I can't directly access the home page anyway. ...

composer require whereof/think-csv $users = User::select(); // All users $csvExporter = new \whereof\think\csv\Export(); $csvExporter->build($users, ['email', 'name'])->download(); Create CSV $exporter - > build ($modelcollection, $fields) requires three parameters. The first is the model (a collection of models), the second is t ...

IDS is an advanced open source key value storage system, which is implemented in ANSI C. It is similar to memcached, but supports persistent data storage Queue operation: <?php $redis = new Redis(); $redis->connect('127.0.0.1',6379); while(True){ try{ $value = 'value_'.date('Y-m-d H:i:s'); $redis->LPUSH('key1',$value); sleep(r ...

First, you need to create an order table Create the database migration file when creating the model php artisan make:model Order -m Perfect database fields public function up() { Schema::create('orders', function (Blueprint $table) { $table->id(); $table->integer('user_id')->comment('User placin ...