How to compare arabic- and kana full-width digits? <p>How can I compare in PHP the two strings </p> <pre><code>県１９−１県２２５−３県９６−１ </code></pre> <p>and </p> <pre><code>県19-1県225-3県96-1 </code></pre> <p>?</p> <p>The first one contains kana full-width numbers, the comparison should treat them as equal to the arabic-numeral.</p>