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javascript - How to turn an array into a negative number in php

1. I have an array array(1,2,3); I need it to become a negative number when inserting it into the database. 2. The front-end input table displays a positive number, and the back-end becomes a negative number before inserting it into the database. How to achieve this?

欧阳克 2017-06-12 09:22:42

nginx load balancing

1. When nginx does load balancing, does it mean that the number of concurrency supported by nginx used for forwarding by the front end is the maximum number of visits supported by the architecture? 2. If I have multiple server nodes and use nginx for load balancing, and nginx is on the same intranet...

習慣沉默 2017-05-16 17:07:19

How does nginx load balancing bring parameters like rewrite?

1. Configured an nginx load balancing, and like rewrite, the received parameters are also passed to the following code when jumping. How to configure it? Thank you upstream backend { {code...}

仅有的幸福 2017-05-16 17:18:40

Can Nginx load balance URLs?

What I want to ask is, assuming: I now have 3 requests: a : http://test.com/aaab : http://test.com/bbbc : http://test.com/ccc Now I have 3 Server: s1: responsible for the request load of a, b s2: responsible for the request load of b, c s3: responsible for the request load of a, c, which means to en...

PHP中文网 2017-05-16 17:11:53

nginx - load balancing issues

What are the similarities and differences between nginx/zookeeper load balancing functions?

我想大声告诉你 2017-05-16 17:21:15

Is there a way to automatically update the offset in the query when tijdtot is negative

I have a question. I have a query that calculates how many days until the next Grand Prix event in a list. Then I use the offset, if the event goes to 0 days or negative, I actually want to automatically go to the next positive number. I calculate Timeto between datetime and curdate in a table. SELE...

P粉023326773 2023-09-12 22:58:55

PHP substr() function

How to understand the usage of PHP substr() function: If the start parameter is a negative number and length is less than or equal to start, then length is 0. This sentence

ringa_lee 2017-05-24 11:30:51

In php, if the system time is set after 2038-01-19, the current time obtained is truncated to a negative number. How to solve it?

The system is a 64-bit operating system, PHP 7.3 is also 64-bit, PHP_INT_MAX is 9223372036854775807, date.timezone = "PRC" sets the system time to 2038-01-19, and the current time obtained using time() is truncated to a negative number. , use $dateTime = new DateTime();$timestamp = $dateTi...

andrew_阿雄 2023-07-29 17:15:28

apache - Does it matter if the nginx host configuration for load balancing is slightly different?

I plan to use one nginx to configure load balancing and forward PHP to several apache hosts for running. So it doesn’t matter if the nginx used for load balancing is configured differently? Because it only load forwards?

習慣沉默 2017-05-16 16:59:59

The thinkphp5 database connection is normal but a Server Error is reported when logging in to the background?

Server configuration php7.2+mysql database+Nginx load balancing

初学编程 2021-11-28 11:08:14

What is the connection between nginx reverse proxy and load balancing?

What is the connection between nginx reverse proxy and load balancing?

世界只因有你 2017-05-16 17:21:36

nginx - How does load balancing calculate the number of visits to all LAN IPs under the same public network address?

How does load balancing calculate the number of visits to all LAN IP addresses under the same public network address? The load we are currently using is a product of a certain manufacturer (to avoid suspicion of advertising, the manufacturer name will not be mentioned). The load provides a public ne...

巴扎黑 2017-05-16 17:24:40

nginx load balancing problem

If I have multiple server nodes and use nginx for load balancing, and nginx and each application server are on the same intranet, will all the server nodes not use external network traffic, and only the nginx server will use external network traffic? The understanding is that nginx does the relay fo...

某草草 2017-05-16 17:14:01

nginx load balancing problem based on domain name

Question {code...} Description: {code...} Access domain name 502: {code...} Questions? Can nginx upstream perform load balancing based on domain name? Even after setting Host $http_host, it still remains the same.

黄舟 2017-05-16 17:08:23

apache - 20G logs are generated in a day. What is the approximate load level in a day?

If 20G logs are generated in a day, what is the approximate load level in a day?

淡淡烟草味 2017-05-16 17:02:56

What causes Java SE multi-thread security issues?

Maybe the code in the picture has a low probability of negative numbers, but if you add Thread.sleep(10); after the if statement, you can see that the negative numbers are output.

阿神 2017-06-12 09:26:22

php - How does laravel load balancing implement csrf defense?

Laravel enables csrf by default, using csrf_token() to generate a random string and save it in the browser and session file. Then find the corresponding session file based on the cookie returned by the browser, and obtain the token for comparison. But the problem is if Use load balancing and configu...

phpcn_u1582 2017-06-05 11:09:22

After nginx completes the load, the login request repeats 302

There are two physical hosts A and B running tomcat respectively. The operating environment is both window. Host a runs nginx and redis is also installed on a. If redis session sharing is not used, you can log in to any one by itself, but using redis sharing After that, request a host, and then load...

巴扎黑 2017-05-16 17:07:04

How to achieve high availability with nginx load balancing

Use nginx to implement simple load balancing. The configuration is as follows {code...} The problem now is: if both tomcats are normal, nginx can distribute requests to the specified server normally. Using polling, the weight can also be adjusted. It works, but if I shut down one of the tomcats, the...

天蓬老师 2017-06-10 09:49:33

How to redirect to exact URL when using nginx for load balancing configuration

For example, when using nginx to configure load balancing, how to redirect to the specified URL, not just the domain name or IP. {Code...} Please give me some guidance.

世界只因有你 2017-05-16 17:13:20