Convert English or French notation to decimal

PHP

```
function number_format_to_decimal(?string $value)
{
if (is_null($value)) {
return null;
}
$countCommaSeperators = 0;
$countDotSeperators = 0;
// Check if the comma separator exists.
if (strpos($value, ',') !== false) {
$countCommaSeperators += substr_count($value, ',');
}
// Check if the dot separator exists.
if (strpos($value, '.') !== false) {
$countDotSeperators += substr_count($value, '.');
}
// If there is one separator, and it is a comma.
if ($countCommaSeperators == 1 && $countDotSeperators == 0) {
$countDecimals = strlen(substr($value, strpos($value, ",") + 1));
// If there are 3 decimal places, we can assume that it is a thousand.
if ($countDecimals == 3) {
// Remove the comma.
$decimal = str_replace(',', '', $value);
} else {
// Replace the comma with a period.
$decimal = str_replace(',', '.', $value);
}
}
// If there's one separator, and it's a dot.
elseif ($countCommaSeperators == 0 && $countDotSeperators == 1) {
$countDecimals = strlen(substr($value, strpos($value, ".") + 1));
// If there are 3 decimal places, we can assume that it is a thousand.
if ($countDecimals == 3) {
// We remove the period.
$decimal = str_replace('.', '', $value);
} else {
// Do Noting
$decimal = $value;
}
}
// If there are two different separators.
elseif ($countCommaSeperators == 1 && $countDotSeperators == 1) {
$decimal = str_replace(',', '.', $value);
$decimal = preg_replace('/[.](?![^.]*$)/', '', $decimal);
}
// If there are multiple dot separators but no comma separators.
elseif ($countCommaSeperators == 0 && $countDotSeperators > 1) {
$decimal = str_replace('.', '', $value);
}
// If there are multiple comma separators but no dot separators.
elseif ($countCommaSeperators > 1 && $countDotSeperators == 0) {
$decimal = str_replace(',', '', $value);
}
// If there are multiple dot separators and one comma separator.
elseif ($countCommaSeperators == 1 && $countDotSeperators > 1) {
$decimal = str_replace('.', '', $value);
$decimal = str_replace(',', '.', $decimal);
}
// If there are multiple comma separators and one dot separator.
elseif ($countCommaSeperators > 1 && $countDotSeperators == 1) {
$decimal = str_replace(',', '', $value);
} else {
$decimal = $value;
}
return $decimal;
}
```

JavaScript

```
function number_format_to_decimal(value)
{
var decimal = "0.00";
var count_comma_seperators = 0;
var count_dot_seperators = 0;
if (value.indexOf(",") != "-1") {
count_comma_seperators += value.split(",").length - 1;
}
if (value.indexOf(".") != "-1") {
count_dot_seperators += value.split(".").length - 1;
}
if (count_comma_seperators == 1 && count_dot_seperators == 0) {
let count_decimals = value.split(",")[1].length;
if (count_decimals == 3) {
decimal = value.replace(",", "");
} else {
decimal = value.replace(",", ".");
}
} else if (count_comma_seperators == 0 && count_dot_seperators == 1) {
let count_decimals = value.split(".")[1].length;
if (count_decimals == 3) {
decimal = value.replace(".", "");
} else {
decimal = value;
}
} else if (count_comma_seperators == 1 && count_dot_seperators == 1) {
decimal = value.replace(",", ".");
decimal = decimal.replace(/[.](?![^.]*$)/, "");
} else if (count_comma_seperators == 0 && count_dot_seperators > 1) {
decimal = value.replace(/\./g, "");
} else if (count_comma_seperators > 1 && count_dot_seperators == 0) {
decimal = value.replace(/\,/g, "");
} else if (count_comma_seperators == 1 && count_dot_seperators > 1) {
decimal = value.replace(/\./g, "");
decimal = decimal.replace(/\,/g, ".");
} else if (count_comma_seperators > 1 && count_dot_seperators == 1) {
decimal = value.replace(/\,/g, "");
} else {
decimal = value;
}
return decimal;
}
```