title: PHP check string has contains only letters numbers and spaces in any language
body: <p>How can i check string has contains only letters numbers and spaces in any language?</p>
  <p>I have tried bellow but it's not checks special characters like -*/.</p>
  <pre><code> preg_match(&quot;/[\p{L}]/u&quot;, $string )
   preg_match(&quot;/[\p{N}]/u&quot;, $string  )
  </code></pre>