php-doc-en/reference/var/functions/is-float.xml

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  <refentry id="function.is-float">
   <refnamediv>
    <refname>is_float</refname>
    <refpurpose>Finds whether a variable is a float</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>bool</type><methodname>is_float</methodname>
      <methodparam><type>mixed</type><parameter>var</parameter></methodparam>
     </methodsynopsis>
    <simpara>
     Returns &true; if <parameter>var</parameter> is a <type>float</type>,
     &false; otherwise.
    </simpara>
    <note>
     <para>
      To test if a variable is a number or a numeric string (such as form
      input, which is always a string), you must use
      <function>is_numeric</function>.
     </para>
    </note>
    <simpara>
     See also 
     <function>is_bool</function>,
     <function>is_int</function>,
     <function>is_numeric</function>,
     <function>is_string</function>,
     <function>is_array</function>, and
     <function>is_object</function>,
    </simpara>
   </refsect1>
  </refentry>

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