Then, once I have determined there are more than one dot, how can I remove all the dots but the right most one?
You can replace a limited number of matches using preg_replace(). <?php
$number = '123.456.789.10';
$count = substr_count($number, '.');
$number = preg_replace('/\./', '', $number, $count - 1);
echo $number;?>
so 123.456.789.01 would become 123456789.01 with just the dot before the zero.
Thanks in advance.
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