PHP

PHP provides us with a variety of system functions to implement the various functions we need, so how do we implement these functions without using system functions? Here is how several system functions are implemented.First, let's define an

ThinkPHP + phpexcel: Example of excel report output function, thinkphpphpexcel This example describes how to use thinkPHP + phpexcel to output excel reports. We will share this with you for your reference. The details are as follows: Preparations: 1.

Common HTTP status codes and common http Status Codes 200 OK request successful. It is generally used for GET and POST requests. 301 Moved Permanently is Permanently Moved. The requested resource has been permanently moved to the new URI. The

Reverses a word in an English sentence, and the corresponding position is case-insensitive. Enter an English sentence, only English text (a-z, A-Z), each word between only one space lattice, front and back no space.The returned result is to reverse

Install and use laravel-u-editor by composer, and use composer by laravel. 　　Preface The framework used is laravel5.1, which is built by composer. You can directly configure composer. If it is not set up by composer, you need to install composer

What is an integer data type? an integer is an integer that we often call. it can only be an integer. for example, if we wrote 123456, my age is 20, this is an integer, or-123456, this represents an integer. all of these values are in decimal format.

In our php website development, images are often processed. The most common one is to generate thumbnails for uploaded images or images in articles, the following is the 10 code used to generate thumbnails by using php for your use and download! 1. &

Font size refers to the size of a word displayed on the screen or printed media. each word is regarded as a square, and the size is calculated based on the diagonal length of the square. the font size is the same as the font color, it is an

This article describes how to set up an HTTP server and an FTP server in Python for reference, interested friends can refer to this article for details about how to build an HTTP server and an FTP server in Python, which has some reference value,

The following is an article about four numeric types of python (int, long, float, complex ). I think this is quite good. now I will share it with you and give you a reference. Let's take a look at it. Python supports four different numerical types,

The following is an article about memory usage of Python objects. I think this is quite good. now I will share it with you and give you a reference. Let's take a look at it together. everything is an object. In Python, everything is an object,

This article introduces Python errors and exceptions concepts Python errors and exceptions (total) 1. how to handle errors and exceptions Common errors A: NameError If True: SyntaxError F = oepn('1.txt '): IOError 10/0: ZeropisionError A =

Everyone knows that Python is a built-in Pdb library, and it is very convenient to debug Python programs using Pdb. However, Pdb cannot be used for remote debugging and multithreading. let's take a look at how to debug Python and common commands

This article mainly introduces Socket network programming in python, which has some reference value. if you are interested, please refer to it. What is network? A network is composed of nodes and connections, indicating many objects and their

Supervisor is a Python-based process management tool that allows you to easily manage programs that need to be executed in the form of Daemon, that is, background tasks. for example, it is used to start and manage Web programs written based on

The magic method of Python is the predefined functions of the type _ XXX _ in Python. The biggest advantage of using the Python magic method is that python provides a simple method to make objects behave like built-in types. _ Str _ function _ str _

Operators & amp; quot; and & amp; difference analysis of amp; quot; is & amp; quot; Preface Before talking about the differences between the is and = operators, you must first know the three basic elements of an object in Python: id (id), python

Detailed description of the python crawler framework scrapy instance generation project Scrapy provides a tool to generate a project. some files are preset in the generated project. you need to add your own code to these files. Open the command

This article provides a brief summary of simple applications that throw exceptions and customize exceptions in Python and pass exceptions. For more information, see 1. throw an exception Python uses an exception object to indicate exceptions. An

This article mainly introduces the example code for parsing xml files using the xml. dom module in python. learn how to parse xml files using python. For more information, see I. python module xml. dom parsing XML API Minidom. parse (filename) Load