php-doc-en/reference/intl/constants.xml

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<appendix xml:id="intl.constants" xmlns="http://docbook.org/ns/docbook"
 xmlns:xlink="http://www.w3.org/1999/xlink">
 &reftitle.constants;
 <para>
  <variablelist>
   <varlistentry xml:id="constant.intl-max-locale-len">
    <term>
     <constant>INTL_MAX_LOCALE_LEN</constant>
     (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
      Limit on locale length, set to 80 in PHP code. Locale names longer 
      than this limit will not be accepted.
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.idna-default">
    <term>
     <constant>IDNA_DEFAULT</constant>
     (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
      Prohibit processing of unassigned codepoints in the input for IDN
      functions and do not check if the input conforms to domain name ASCII rules.
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.idna-allow-unassigned">
    <term>
     <constant>IDNA_ALLOW_UNASSIGNED</constant>
     (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
      Allow processing of unassigned codepoints in the input for IDN functions.
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.idna-use-std3-rules">
    <term>
     <constant>IDNA_USE_STD3_RULES</constant>
     (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
      Check if the input for IDN functions conforms to domain name ASCII rules.
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.idna-check-bidi">
    <term>
     <constant>IDNA_CHECK_BIDI</constant>
     (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
      Check whether the input conforms to the BiDi rules.
      Ignored by the IDNA2003 implementation, which always performs this check.
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.idna-check-contextj">
    <term>
     <constant>IDNA_CHECK_CONTEXTJ</constant>
     (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
      Check whether the input conforms to the CONTEXTJ rules.
      Ignored by the IDNA2003 implementation, as this check is new in IDNA2008.
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.idna-nontransitional-to-ascii">
    <term>
     <constant>IDNA_NONTRANSITIONAL_TO_ASCII</constant>
     (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
      Option for nontransitional processing in
      <function>idn_to_ascii</function>. Transitional processing is activated
      by default. This option is ignored by the IDNA2003 implementation.
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.idna-nontransitional-to-unicode">
    <term>
     <constant>IDNA_NONTRANSITIONAL_TO_UNICODE</constant>
     (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
      Option for nontransitional processing in
      <function>idn_to_utf8</function>. Transitional processing is activated
      by default. This option is ignored by the IDNA2003 implementation.
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.intl-idna-variant-2003">
    <term>
     <constant>INTL_IDNA_VARIANT_2003</constant>
     (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
      Use IDNA 2003 algorithm in <function>idn_to_utf8</function> and
      <function>idn_to_ascii</function>. This is the default.
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.intl-idna-variant-uts46">
    <term>
     <constant>INTL_IDNA_VARIANT_UTS46</constant>
     (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
      Use UTS #46 algorithm in <function>idn_to_utf8</function> and
      <function>idn_to_ascii</function>.
     </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.idna-error-empty-label">
    <term>
     <constant>IDNA_ERROR_EMPTY_LABEL</constant> (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_LABEL_TOO_LONG</constant> (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_DOMAIN_NAME_TOO_LONG</constant> (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_LEADING_HYPHEN</constant> (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_TRAILING_HYPHEN</constant> (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_HYPHEN_3_4</constant> (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_LEADING_COMBINING_MARK</constant>
     (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_DISALLOWED</constant> (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_PUNYCODE</constant> (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_LABEL_HAS_DOT</constant> (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_INVALID_ACE_LABEL</constant> (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_BIDI</constant> (<type>integer</type>)
    </term>
    <term>
     <constant>IDNA_ERROR_CONTEXTJ</constant> (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
      Errors reported in a bitset returned by the UTS #46 algorithm in
      <function>idn_to_utf8</function> and
      <function>idn_to_ascii</function>.
     </simpara>
    </listitem>
   </varlistentry>
  </variablelist>
 </para>
</appendix>

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