php-doc-en/reference/intl/intlchar/isidignorable.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->

<refentry xml:id="intlchar.isidignorable" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>IntlChar::isIDIgnorable</refname>
  <refpurpose>Check if code point is an ignorable character</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <modifier>public</modifier> <modifier>static</modifier> <type>bool</type><methodname>IntlChar::isIDIgnorable</methodname>
   <methodparam><type>mixed</type><parameter>codepoint</parameter></methodparam>
  </methodsynopsis>
  <para>
   Determines if the specified character should be regarded as an ignorable character in an identifier.
  </para>
  <para>
   &true; for characters with general category "Cf" (format controls) as well as non-whitespace ISO controls (U+0000..U+0008, U+000E..U+001B, U+007F..U+009F).
  </para>
  <note>
   <para>
    Note that Unicode just recommends to ignore Cf (format controls).
   </para>
  </note>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <variablelist>
   <varlistentry>
    <term><parameter>codepoint</parameter></term>
    <listitem>
     &intl.codepoint.parameter;
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns &true; if
   <parameter>codepoint</parameter> is ignorable in identifiers, &false; if not.
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <example>
   <title>&intl.codepoint.example;</title>
   <programlisting role="php">
    <![CDATA[
<?php
var_dump(IntlChar::isIDIgnorable("A"));
var_dump(IntlChar::isIDIgnorable(" "));
var_dump(IntlChar::isIDIgnorable("\u{007F}"));
?>
]]>
   </programlisting>
   &example.outputs;
   <screen>
    <![CDATA[
bool(false)
bool(false)
bool(true)
]]>
   </screen>
  </example>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>IntlChar::isIDStart</function></member>
    <member><function>IntlChar::isIDPart</function></member>
    <member><constant>IntlChar::PROPERTY_DEFAULT_IGNORABLE_CODE_POINT</constant></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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