PHP

Use PHP to generate a QR code. Today, with extensive application of QR codes, it is the most basic requirement to automatically generate corresponding QR codes on websites. This article introduces three ways to automatically generate a QR code using

Example of rrnt differences in php. N soft carriage return: in Windows, it indicates a line break and returns to the start position of the next line. It is equivalent to the r effect in MacOS. In Linux and unix, only line breaks are displayed, but \

Php full-width conversion to halfwidth functions. I tried to replace ASCII characters on the internet and found many inexplicable problems. Finally, replace it with the following character replacement method. I tried to replace all the currently

Usage of the phpcurl_init function. Using the PHP cURL library, you can easily and effectively capture webpages. You only need to run a script and analyze the web page you crawled, then, you can get the desired PHP cURL library in the form of a

Html_entity_decode () converts an HTML object into a character prototype. PHPhtml_entity_decode () applies to PHP4.3.0 + and converts HTML objects into characters. Html_entity_decode (a string containing HTML entities, which can be used to decode

Php apc cache details the installation of the apc module. 1. APC cache overview APC, full name: AlternativePHPCache. the official translation is optional PHP Cache. It provides us with a framework for caching and optimizing PHP intermediate code.

The codeigniter framework inserts data in batches. Copy the code as follows: $ sub_formarray (); $ loop0; $ ins_loop0; $ sumcount ($ form_datas); $ this-logger-info (insertdatatotal :. $ sum); using batch transaction import helps The code is as

Usage of php9 Super global variables (2 ). Let's talk about $ _ GET () and $ _ POST () today (). In fact, it is easy to understand. it can be seen from the surface that it is to obtain the data of the post and get Forms. In fact, this is also the

PHPStartup: Unabletoloaddynamiclibrary. Yesterday, I helped a friend configure the server and found that there was a prompt for PHPWarning: PHPStartup: Unabletoloaddynamiclibrary in the apache log. then I debugged the database connection and found

In windows, phpcurl supports the configuration method. If Fatalerror: Calltoundefinedfunction: curl_init () is prompted when the php environment is installed but curl_init () is used for testing, this proves that our curl is not properly configured,

The error "Failedtowritesessiondata" is returned in php. When we look at the Failedtowritesessiondata prompt, we will know that the session cannot be written. the solution is to set a save_path path in php. ini. Error message: W we can see the

Solution for ecshop background logon timeout session expiration. Many users may find that their ecshop often times out when it is used. There are many solutions to this problem. we can directly modify it in ecsho, the specific method is as follows.

Phppdo_mysql is not installed. When pdo_mysql is not installed, the system will prompt that pdo_mysql must be supported. check whether the pdo_mysql module is correctly loaded. the installation method is simple. let's take a look. Solution: 1. when

PHP character truncation function, compatible with various gbk and UTF-8 encoding. In PHP, the character truncation function substr can only intercept all English letters without garbled characters. if there is a Chinese character in it, it cannot

Php file upload code. A simple php file Upload class is an image processing class found during PHP class sorting. php has many Image processing classes, including processing images separately and adding watermarks, it is also a simple php file

Phpmyadmin4 + slow access solution. Many of my friends have found that phpmyadmin4.0 or later versions are much slower to open than before. if dedecms is used, they will encounter the same problem, dedecms is solved by loading many friends who found

PHP obtains the Flash playback addresses on the pages of major video websites. Many of our friends directly use the flash playback address of a large video website for movie websites. if this does not affect our server, the following is a small

A summary of how to add correlated elements to the php array. Here we will introduce how to add an associated array to the array, and then combine the multi-dimensional array. here I will give you some examples to help you. Here we will introduce

For phpfile_get_contents data collection and common problems, see solution. In php, the file_get_contents function is rarely used for batch data collection. However, for a small amount of data, you can use the file_get_contents function, because it

Php obtains the summary of the file name suffix instance. When uploading php files, we need to obtain the file name suffix and then determine the simple file type. in php, the file name suffix acquisition method is very simple and there are many