GOOCODE - Find your code/scripts

0 In the AJAX era, network requests such as APIs are made through XMLHttpRequest or encapsulated frameworks. The fetch framework now produced is simply to provide more powerful and efficient network requests. Although there are currently a few browser compatibility issues, when we make some asynchronous requests, we can use fetch to make perfect network requests.

1 javascript uses alphanumeric to sort by default. Therefore, the result of [1,2,5,10] .sort () is [1, 10, 2, 5]. If you want to sort correctly, you should do this: [1,2,5,10] .sort ((a, b) => a-b)

javascript uses alphanumeric to sort by default. So the result of [1,2,5,10] .sort () is [1, 10, 2, 5].

0 Finally, with the arrival of January 14, 2020, the ten-year-old Windows 7 operating system has officially retired. Starting today, Microsoft will officially discontinue support for Win7, which means that users can still use this classic operating system normally, but Microsoft will no longer perform any reason and update.

Microsoft stated that "after January 14, 2020, Microsoft will no longer provide security upgrades or support for computers with Windows 7 installed." Windows 7 was born in 2009, and it has been more than 10 years. 10 years of maintenance, so the impact of this outage is not small.

0 When we use Google Blogger, we will find that even if we use a custom domain name, the page content also contains CSS and JS files from the Google Blogger domain. Since the domain name is inaccessible from the country, it will slow down the website access speed, in order to speed up the website loading speed. It is necessary to delete the CSS and JS files loaded by the system by default. Let me tell you how to delete these CSS and JS.

Go to the Google Blogger background, click on "Themes", select the current theme, select "Modify HTML", and enter the HTML source code modification interface.

0 When working with the Unicode character set, use the corresponding function instead of the native string function. For example, if a file is encoded as UTF-8 PHP code, if the strlen() function is wrong, use the mb_strlen() function instead.

If you use substr to intercept Chinese characters, garbled characters will appear, because substr is intercepted in bytes. That is, UTF-8 encoded Chinese, using substr interception, will only intercept 1/3 Chinese, of course, garbled. When UTF-8 is encoded, a Chinese character is 3 bytes. Similarly, different languages in other countries will produce multi-byte strings, so we use mb_strlen() to handle them.

0 Never know the user's password, we must encrypt the user's password, and can not save the user's original password directly in the database. Do not limit the user password format. If the format is specified, it may be exploited and cracked by the attacker. Of course, we need to limit the minimum length of the password. It is recommended to use at least 8 bits. The longer the better.

For password security, developers need to:
1, absolutely can not know the user's password, we must encrypt the user's password, can not save the user's original password directly in the database.
2, do not limit the user password format, if the format is specified, it is likely to be exploited and cracked by the attacker, of course, we need to limit the minimum length of the password, it is recommended to at least 8 bits, the longer the better.
3, can not send the user password through the mailbox, when we develop the application to retrieve the password, the user password is not notified to the user by email, but the link to reset the password is sent to the user in the form of mail, let the user Go to reset the password.

0 Never trust external input, don't trust any data from a data source that is not under your direct control. In actual development, there is always someone intentionally or unintentionally injecting dangerous data into PHP code, so PHP security programming becomes important. Generally, we deal with external input security ideas: filtering input and verifying data.

Filtering input means escaping or deleting characters that are not safe from external data.

0 When we do web project development, we often need to periodically back up data, periodically restart a service or periodically execute a PHP program, etc., generally use Crontab under Linux and use scheduled tasks under Windows. This article focuses on the basics of using Crontab under Linux and performing PHP tasks.

Crontab is a commonly used timing execution tool for Unix/Linux systems that runs specified jobs without human intervention.

0 On the evening of July 2nd, Cloudflare, a well-known website that provides services such as CDN service and DNS, has network errors in many parts of the world. The use of Cloudflare service website may lead to "502 gateway error", etc., and is affected by the failure of Internet infrastructure service provider Cloudflare. Impact, many websites have encountered downtime, prompting 502 gateway error when accessing.

Afterwards, Cloudflare CEO Matthew Prince said that this round of downtime was not caused by hacker DDOS attacks, but the server was overloaded. "Due to a bug in the Cloudflare Web Application Firewall (WAF) service, this error caused a significant increase in CPU usage, causing a crash in the primary and backup systems and causing the user's website to encounter a 502 error; therefore, Cloudflare is temporarily down. Part of the WAF's functionality, solved the bug that caused the problem, and re-launched the WAF service."

0 Recently, it was revealed that Gates once again expressed his "great regret" to the Android system when he participated in the exchange activities organized by venture capital company Village Global.

Gates said that the biggest mistake he made when managing the company was that he did not let Microsoft become the "non-Apple" operating system platform, and let Android rise, which is a $400 billion business.