reference/datetime/functions/timezone-name-from-abbr.xml
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<refentry xml:id="function.timezone-name-from-abbr" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>timezone_name_from_abbr</refname>
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<refpurpose>Returns the timezone name from abbreviation</refpurpose>
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<refpurpose>Returns a timezone name by guessing from abbreviation and UTC offset</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>string</type><methodname>timezone_name_from_abbr</methodname>
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<type class="union"><type>string</type><type>false</type></type><methodname>timezone_name_from_abbr</methodname>
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<methodparam><type>string</type><parameter>abbr</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>gmtOffset</parameter><initializer>-1</initializer></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>isdst</parameter><initializer>-1</initializer></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>utcOffset</parameter><initializer>-1</initializer></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>isDST</parameter><initializer>-1</initializer></methodparam>
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</methodsynopsis>
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</refsect1>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>gmtOffset</parameter></term>
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<term><parameter>utcOffset</parameter></term>
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<listitem>
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<para>
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Offset from GMT in seconds. Defaults to -1 which means that first found
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>isdst</parameter></term>
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<term><parameter>isDST</parameter></term>
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<listitem>
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<para>
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Daylight saving time indicator. Defaults to -1, which means that
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whether the time zone has daylight saving or not is not taken into
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consideration when searching. If this is set to 1, then the
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<parameter>gmtOffset</parameter> is assumed to be an offset with
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daylight saving in effect; if 0, then <parameter>gmtOffset</parameter>
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<parameter>utcOffset</parameter> is assumed to be an offset with
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daylight saving in effect; if 0, then <parameter>utcOffset</parameter>
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is assumed to be an offset without daylight saving in effect. If
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<parameter>abbr</parameter> doesn't exist then the time zone is
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searched solely by the <parameter>gmtOffset</parameter> and
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<parameter>isdst</parameter>.
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searched solely by the <parameter>utcOffset</parameter> and
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<parameter>isDST</parameter>.
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</para>
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</listitem>
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</varlistentry>
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