# Tag: math

## PHP Pagination from Huge JSON array_chunk in to multiple files and getting offset

So I have this huge file that has 45K+ arrays and I can’t just open a huge file on live server with high traffic from every request so I used array_chunk(\$array, 1000) and saved them in 46 files. Now I want to read those files when specific page is accessed. Problem? \$offset seems to be working fine with some pages

## Php array to pow numbers revers function problem

When I run the code above, I convert 24 sample data into a folded number and print it. Then when I want to call the numbers from the database and convert them back to strings, some of them seem wrong. Result: Reverse engineering is required. There is a problem with the number 30 in the aiflag2array function. The array2aiflag function

## PHP Variable value based on user input

I’m building an application to help customer calculate various product prices. Right now I’m building a feature where user enters a single number to the application and submits a form. Based on that number, I would like to define another variables value. What I’d like to achieve If user input is number between 1-10, set variable number to 200. If

## How to make a script which outputs the ratio of the factorials of two numbers (N! / M!)?

I have a code that find n factorial: but, how can I find the ratio of the factorials of two numbers (N! / M!)? Answer You can add a return in you function and call her 2 times:

## Php code to see if two lines are parallel

I want to write a PHP code to see if two lines are parallel. We have But it’s not working correct even if given two parallel lines Answer The Slope is equal to m = (y2 – y1) / (x2 – x1) I made some changes in your formula so it’s working I think. it’s just a math problem

## Retrieving all combinations from a database table with alternative values

Say we have a simple DB-table tab created in MySql with CREATE TABLE `tab` ( `id` int(11) NOT NULL AUTO_INCREMENT, `val` int(11) DEFAULT NULL, `altval` int(11) DEFAULT NULL, PRIMARY KEY (`id`) ); …

## Why is this addition function sometimes not working in PHP?

I’m currently writing a class to manage time in a specific format. The output is always in this format: 0000:00:0:00:00 which stands for YYYY:WW:D:HH:MM. I have a function to add time and it seemed to …

## Iterate array of arrays in reverse and subtract following subarray values from current subarray values

I have a dynamic multidimensional array like this: I need to loop through the subarrays and overwrite the current values of each subarray to represent the difference between the original value and the following value with respect to the subarray keys. This describes the arithmetic desired on each subarray element (the value after the = is the new desired value):

## Calculating The Percentage Change Between Two Numbers

Looking for some clarification on below code for calculating the percentage change between two different number of which the original could be a greater or smaller number. So will this code work for showing either a increase + or a decrease – change? Thanks. Answer Find difference and then count percentage like this Difference will be same for 110 and

## How I can create my own pow function using PHP?

I want to create a function in which I put two values (value and its power – Example function: multiply(3, 3) result 27). I have tried so far but failed, I have searched using Google but I have been unable to find any result because I don’t know the name of this function. What I want exactly: 3,3 => 3