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

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<appendix xml:id="fileinfo.constants" xmlns="http://docbook.org/ns/docbook">
 &reftitle.constants;
 &extension.constants;
 <variablelist>
  <varlistentry xml:id="constant.fileinfo-none">
   <term>
    <constant>FILEINFO_NONE</constant>
     (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     No special handling.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.fileinfo-symlink">
   <term>
    <constant>FILEINFO_SYMLINK</constant>
     (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Follow symlinks.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.fileinfo-mime-type">
   <term>
    <constant>FILEINFO_MIME_TYPE</constant>
     (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Return the mime type.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.fileinfo-mime-encoding">
   <term>
    <constant>FILEINFO_MIME_ENCODING</constant>
     (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Return the mime encoding of the file.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.fileinfo-mime">
   <term>
    <constant>FILEINFO_MIME</constant>
     (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Return the mime type and mime encoding as defined by RFC 2045.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.fileinfo-compress">
   <term>
    <constant>FILEINFO_COMPRESS</constant>
     (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Decompress compressed files.
    </simpara>
    <simpara>
     Disabled due to thread safety issues.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.fileinfo-devices">
   <term>
    <constant>FILEINFO_DEVICES</constant>
     (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Look at the contents of blocks or character special devices.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.fileinfo-continue">
   <term>
    <constant>FILEINFO_CONTINUE</constant>
     (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Return all matches, not just the first.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.fileinfo-preserve-atime">
   <term>
    <constant>FILEINFO_PRESERVE_ATIME</constant>
     (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     If possible preserve the original access time.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.fileinfo-raw">
   <term>
    <constant>FILEINFO_RAW</constant>
     (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Don't translate unprintable characters to a <literal>\ooo</literal> octal
     representation.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.fileinfo-extension">
   <term>
    <constant>FILEINFO_EXTENSION</constant>
     (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     Returns the file extension appropriate for the MIME type detected in 
     the file.
    </simpara>
    <simpara>
     For types that commonly have multiple file extensions, such as <literal>JPEG</literal> 
     images, then the return value is multiple extensions separated by a forward slash e.g.: 
     <literal>"jpeg/jpg/jpe/jfif"</literal>. For unknown types not available in the 
     <filename>magic.mime</filename> database, then return value is <literal>"???"</literal>.
    </simpara>
    <simpara>
     Available since PHP 7.2.0.
    </simpara>
   </listitem>
  </varlistentry>
 </variablelist>
</appendix>

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