How to replace commas with dots and vice versa - php

Question

I have a string with this value:
$myValue = "1.099,90";
And I want to replace commas with dots and vice versa. Just like this:
$myNewValue = "1,099.90";
I know that there must be other better ways of doing this, but all I can get is:
$myNewValue = str_replace(",","|",$myValue);
$myNewValue = str_replace(".",",",$myValue);
$myNewValue = str_replace("|",".",$myValue);
This way looks weird and has a bad smell! Is there a cleaner way?

Answer 1

strtr() doesn't replace replacements, so you can avoid the temporary piping.
Code: (Demo)
$myValue = "7.891.099,90";
echo strtr($myValue, ".,", ",.");
// or
// echo strtr($myValue, ["." => ",", "," => "."]);
Output:
7,891,099.90
Resource: http://php.net/manual/en/function.strtr.php

Answer 2

This will get the job done, but you could definitely use preg_replace to come up with a different method as well.
<?php
$myValue = '1.099,90';
$parts = explode(".", $myValue); // break up the (.)periods
$num = count($parts); // number of parts
for($loop = 0; $loop < $num; $loop++){ // cycle through each part
if(strpos($parts[$loop], ",") !== false){ // if this includes (,)comma - swap it
$parts[$loop] = str_replace(",", ".", $parts[$loop]);
}
if($loop !== ($num - 1)){ // if this is not the last loop iteration..add comma after (replace period)
$myNewValue .= $parts[$loop] . ",";
} else {
$myNewValue .= $parts[$loop]; // last loop iteration, no comma at end
}
}
echo $myNewValue;
You can also use the str_replace w/ extra | symbol (or anything)...
<?php
$myValue = '1.099,90';
$replace = array(",", ".", "|");
$with = array("|", ",", ".");
$myNewValue = str_replace($replace, $with, $myValue);
echo $myNewValue;
?>