Divide multiple values contained in a single string in php

Question

Hi,

I have a string like this:

$coord = "1,0 1,8 7,13 7,94";

and I need to divide by 100 each one of the values to get something like this:

0.01,0 0.01,0.08 0.07,0.13 0.07,0.94

So I tried this:

$pair=explode(" ", $coord);

foreach ($pair as $val) {
    $sing = explode(",", $val);
    foreach ($sing as $div) {
     $res = ($div/100);
    }
    $sing_d = implode(",", $res);
}

$result = implode(" ", $sing_d);

print ($result);

but I get an error:

Warning: implode(): Invalid arguments passed

What is the simplest way to do this?

It would have been if you had put $res[] = $div/100. Note the square brackets. Also the (round) parentheses you put are not needed, nor do they make the result an array. — trincot
– trincot, Commented Jun 18, 2016 at 17:31

trincot · Accepted Answer · 2016-06-18 17:21:10Z

2

You could use preg_replace_callback to find and replace all numbers by their value divided by 100:

$result = preg_replace_callback("/\d+(\.\d+)?/", function ($match) {
    return $match[0]/100;
}, $coord);

answered Jun 18, 2016 at 17:21

trincot

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1 Comment

Cain Nuke Over a year ago

Excellent answer. I didnt know that function. Its great. Thank you.

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