Programmer Group

Detailed introduction of angular file upload Angular file upload is a lightweight AngularJS file upload tool. It is designed for the file API Polyfill which does not support browser, and uses HTML5 to upload files directly. Online demo Characteristic Support upload progress, cancel or abort when uploading, support file drag ( ...

How to understand object-oriented Abstract is the prerequisite of encapsulation, inheritance and polymorphism. Reasonable abstraction comes from reasonable analysis and understanding of business topics. Reasonable abstraction should be self consistent and easy to understand about the relationship betwee ...

Ci framework does not support creating CommonController directly under controllers and inheriting the parent class like yii2 framework. When we want to do login control or permission control, it is unreasonable to operate directly on the parent class controller. At this time, the more convenient method is to extend the CI controller of the pare ...

zabbix theory + operation-02 (zabbix deployment + email alarm) Experimental environment Monitoring end: 192.168.136.168Monitored end: 192.168.136.185 Install LAMP yum install -y \ httpd \ mariadb-server mariadb \ php \ php-mysql \ php-gd \ libjpeg* \ php-ldap \ php-odbc \ php-pear \ php-xml \ php-xmlrpc \ php-mhash vim /etc/httpd/conf/httpd. ...

First step (1) Form login settings and form validation   1> Set click event - > get the password value of the account entered in the form - > use regular expression to verify the form - > send ajax request - > enter the background - > Import configuration file - > receive the data sent by ajax - &gt ...

1, On regular expression 1. Definition: it is a special character sequence, which can help to detect whether a string matches the character sequence we set. 2. Function: it can quickly retrieve text and replace text. 3. scenario: 1. Check whether a string of numbers is a telephone number 2. Check whether a string conforms to e-mail format 3. Re ...

I have a web page with three drop-down menus, day, month and year. If I use the JavaScript Date constructor with numbers, I get the Date object for the current time zone: new Date(xiYear, xiMonth, xiDate) Enter the correct date, but because of daylight saving time, it thinks it's GMT + 01:00. The problem here is that I then passed the ...

Sketch This is my second blog. After learning the novice part of WEB last time, it's my turn to learn the advanced part of WEB. The purpose of writing down this blog is also to urge myself to do these questions again, because I referred to many writeup s when I did it for the first time, so I also wa ...

  Compile Installation Differences and future choices between PHP source compilation and installation via yum under Centos8 Actually, each of these two methods has its own advantages: yum installation: From the perspective of Yum installation, Yum is equivalent to automatic help you install, regardless of the software dependencies, the yum ins ...

PHP+Mysql implements the example of website top and step voting function. By recording the user's IP address, it can judge whether the user's voting behavior is effective. The example can also be extended to the voting system. First of all, we put the "top" and "step" buttons on the page, that is, "dig up" and &qu ...