PHP 5 in Practice by Elliott White, Jonathan D. Eisenhamer

By Elliott White, Jonathan D. Eisenhamer

With the discharge of personal home page five internet builders desire a consultant to constructing with Hypertext Preprocessor five to either research its complicated new beneficial properties and extra totally enforce the long-standing positive factors on which PHP's luck is equipped. personal home page five in perform is a reference consultant that offers builders with easy-to-use and simply extensible code to unravel universal personal home page difficulties. It makes a speciality of offering actual code suggestions to difficulties, permitting the reader to benefit by means of seeing precisely what's taking place behind the curtain to get your answer. simply because a real-life scenario will infrequently fit the book's instance difficulties accurately, personal home page five in perform explains the answer good sufficient that you're going to comprehend it and will how to really resolve your individual challenge.

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5 creates a function that generates a table of these for a simple compounded mortgage. 5. > There are a few interesting things to point out about this code. To calculate the Rule of 78 number, instead of creating a for loop to add up all the numbers, we used range() to create an array with all the numbers in it. Then array_sum() nicely gives us the total that we were looking for. The other interesting use of math is in the for loop. We need to count in both directions at the same time. We need to count down from the maximum number, to calculate the interest, but we also want to count up, to give the months their numbers from 1 to maximum.

2. 25% interest, // compounded daily, for 3 years. 5% interest, // compounded monthly, for 6 months. > Now let's take this one step further. Perhaps you don't want to know the final value. Instead you want to know a monthly breakout. Let's use a credit card statement as an example. You may want to know, if you are making a set payment each month, how long it will take to pay off the current value. 3. 3. 092; $payment = 200; // Begin our output: echo "

\n"; // Until the value is 0 or less, loop: $month = 1; $cumulative = 0; while ($value > 0) { // Calculate the interest that would be applied this month: $interest = calc_simple_interest($value, $rate, 1/12); // Calculate the new principal $newvalue = $value + $interest; // Determine if the payment would be too much, and adjust accordingly: $payment = ($payment > $newvalue) ?

Php // A Library of Latitude/Longitude functions for various calculations: // A number of functions need to know the mean radius of the Earth for its // calculations. You need to set this constant to that value, in whatever // unit you wish the calculations to be carried out in. For reference, it // is 6371m; however we will use its value in miles. 09); // Function: _deg2rad_multi // Desc: A quick helper function. Many of these functions have to convert // a value from degrees to radians in order to perform math on them.

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Month Initial Value Interest Payment End of Month Balance Cumulative Payments Made