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Course Introduction：PHPExcel notes, mpdf export, phpexcelmpdf. PHPExcel notes, mpdf export, phpexcelmpdf phpexcel common processing ##Import class library require 'PHPExcel/Classes/PHPExcel.php'; require 'PHPExcel/Classes/PHPExcel/Writer/Excel5.php'; //Non-07 format

2016-07-12 comment 0  1159

Course Introduction：The most common way to read and write files in Java is to use the java.io package. The specific methods include: 1. Use FileReader and FileWriter to perform character-level reading and writing of text files, which is suitable for processing human-readable text content; 2. Use BufferedReader and BufferedWriter to provide a buffering mechanism to improve the efficiency of reading and writing text by line, which is suitable for log analysis and configuration file parsing; 3. Use FileInputStream and FileOutputStream to process binary files, which is suitable for copying pictures, network transmission and other scenarios. These classes provide flexible choices based on the data type and operation method. It is recommended to combine try-wit with

2025-07-10 comment 0  946

Course Introduction：To determine the strength of the password, it is necessary to combine regular and logical processing. The basic requirements include: 1. The length is no less than 8 digits; 2. At least containing lowercase letters, uppercase letters, and numbers; 3. Special character restrictions can be added; in terms of advanced aspects, continuous duplication of characters and incremental/decreasing sequences need to be avoided, which requires PHP function detection; at the same time, blacklists should be introduced to filter common weak passwords such as password and 123456; finally it is recommended to combine the zxcvbn library to improve the evaluation accuracy.

2025-07-03 comment 0  479

Course Introduction：Parsing strings is a very common and important operation in PHP, and you will use it whether you are processing user input, reading file content, or interacting with a database. Today we will explore in-depth various methods and techniques for parsing strings in PHP. In PHP, there are many ways to parse strings, from simple string functions to regular expressions to more complex parsing libraries, each with its own unique application scenarios and advantages and disadvantages. Let’s start from the most basic and gradually deepen into more complex analytical techniques. First, let's take a look at the most commonly used string functions in PHP. These functions are simple and easy to use and are suitable for handling basic string operations. For example, the exploit() function can split the string into numbers according to the specified separator.

2025-05-20 comment 0  469

Course Introduction：The easiest way to convert an object to a PHP array is to use type conversion (array)$object. For stdClass objects, properties will be converted directly into array key-value pairs; but private or protected property names will be modified, such as \0MyClass\0name. For custom classes, you can manually map properties or use reflection to get common properties. Recursive conversion is required when processing nested objects to ensure that objects at all levels are converted. You can also consider built-in methods such as json_decode(json_encode($object), true) or framework tools such as Laravel's Arr::fromArrayable(). The choice depends on structural complexity and nature

2025-07-04 comment 0  344

Course Elementary  13745

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

Course Elementary  82260

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

Course Elementary  13130

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

Course Elementary  24578

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Course Elementary  27436

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.