constants.xml

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<appendix xml:id="mbstring.constants" xmlns="http://docbook.org/ns/docbook">
 &reftitle.constants;
 &extension.constants;
 <variablelist>
  <varlistentry xml:id="constant.mb-overload-mail">
   <term>
    <constant>MB_OVERLOAD_MAIL</constant> 
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Removed as of PHP 8.0.0.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.mb-overload-string">
   <term>
    <constant>MB_OVERLOAD_STRING</constant> 
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Removed as of PHP 8.0.0.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.mb-overload-regex">
   <term>
    <constant>MB_OVERLOAD_REGEX</constant> 
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Removed as of PHP 8.0.0.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.mb-case-upper">
   <term>
    <constant>MB_CASE_UPPER</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Performs a full upper-case folding.
     This may change the length of the string.
     This is the mode used by mb_strtoupper().
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.mb-case-lower">
   <term>
    <constant>MB_CASE_LOWER</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Performs a full lower-case folding.
     This may change the length of the string.
     This is the mode used by mb_strtolower().
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.mb-case-title">
   <term>
    <constant>MB_CASE_TITLE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Performs a full title-case conversion based on the Cased and CaseIgnorable
     derived Unicode properties.
     In particular this improves handling of quotes and apostrophes.
     This may change the length of the string.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.mb-case-fold">
   <term>
    <constant>MB_CASE_FOLD</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Performs a full case fold conversion which removes case distinctions
     present in the string.
     This is used for caseless matching.
     This may change the length of the string.
     Available since PHP 7.3.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.mb-case-lower-simple">
   <term>
    <constant>MB_CASE_LOWER_SIMPLE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Performs a simple lower-case fold conversion.
     This does not change the length of the string.
     Available as of PHP 7.3.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.mb-case-upper-simple">
   <term>
    <constant>MB_CASE_UPPER_SIMPLE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Performs simple upper-case fold conversion.
     This does not change the length of the string.
     Available as of PHP 7.3.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.mb-case-title-simple">
   <term>
    <constant>MB_CASE_TITLE_SIMPLE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Performs simple title-case fold conversion.
     This does not change the length of the string.
     Available as of PHP 7.3.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.mb-case-fold-simple">
   <term>
    <constant>MB_CASE_FOLD_SIMPLE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Performs a simple case fold conversion which removes case distinctions
     present in the string.
     This is used for caseless matching.
     This does not change the length of the string.
     Used by case-insensitive operations internally by the MBString extension.
     Available as of PHP 7.3.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.mb-oniguruma-version">
   <term>
    <constant>MB_ONIGURUMA_VERSION</constant>
    (<type>string</type>)
   </term>
   <listitem>
    <simpara>
     The Oniguruma version, e.g. <literal>6.9.4</literal>.
     Available as of PHP 7.4.
    </simpara>
   </listitem>
  </varlistentry>
 </variablelist>
</appendix>
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