Nested for loop php

Question

So I'm creating this php local site for my work it is about mortgage and I made this code as a begging

<?php 
$income=1650;
$rate=7;
$period=240;
$graduation =60;
$paytoinc=40;
$rowage=7;
for ($l=1; $l <= $period ; $l++) { 
    for ($i=1; $i <= $graduation ; $i=+12) { 
        $NPV = (1/pow(1+($rate/100)/12, $i));
        $income = $income*(1+($rowage/100));
        $mpayment = $income *$paytoinc/100 ;
    }
    echo $mpayment = $income *$paytoinc/100 ;
}
?>

I have 2 periods , 1 is included in the other for some reason this is making endless loop , I'm new so can anyone tell me what am I missing and doing wrong ?

So as well as the correct answer below by @bart-friederichs there is a reasonable amount of redundancy in the code. You are evaluating $mpayment on each iteration of the inner loop but only using the final value that you calculate in the last line of your outer loop. You could remove this line from the inner loop to increase efficiency. — Sam Anderson
– Sam Anderson, Commented Jul 13, 2017 at 10:40

Bart Friederichs · Accepted Answer · 2017-07-13 10:34:59Z

4

You are make a mistake here:

for ($i=1; $i <= $graduation ; $i=+12) {

$i=+12 will assign 12 to $i. Change to:

for ($i=1; $i <= $graduation ; $i+=12) {

That being said, learn how to debug. This bug would come up quite quickly if you echo'd $i in the innermost loop.

answered Jul 13, 2017 at 10:34

Bart Friederichs

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1 Comment

Abdalrahman Mokhles Aslan Over a year ago

thanks lots :3 sorry for making you answer for something really stupid xD

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