php-doc-en/reference/filesystem/functions/stat.xml

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<refentry id="function.stat">
 <refnamediv>
  <refname>stat</refname>
  <refpurpose>Gives information about a file</refpurpose>
 </refnamediv>
 <refsect1>
  <title>Description</title>
  <methodsynopsis>
   <type>array</type><methodname>stat</methodname>
   <methodparam><type>string</type><parameter>filename</parameter></methodparam>
  </methodsynopsis>
  <para>
   Gathers the statistics of the file named by
   <parameter>filename</parameter>.  If <parameter>filename</parameter>
   is a symbolic link, statistics are from the file itself, not the
   symlink.  <function>lstat</function> is identical to <function>
   stat</function> except it would instead be based off the symlinks
   status.
  </para>
  <para>
   In case of error, <function>stat</function> returns &false;.  It also
   will throw a warning.
  </para>
  <para>
   Returns an array with the statistics of the file with the
   following elements.  This array is zero-based.  In addition to
   returning these attributes in a numeric array, they can be accessed
   with associative indices, as noted next to each parameter; this is
   available since PHP 4.0.6:
  </para>
  <para>
   <table>
    <title><function>stat</function> and <function>fstat</function> result
     format</title>
    <tgroup cols="3">
     <thead>
      <row>
       <entry>Numeric</entry>
       <entry>Associative (since PHP 4.0.6)</entry>
       <entry>Description</entry>
      </row>
     </thead>
     <tbody>
      <row>
       <entry>0</entry>
       <entry>dev</entry>
       <entry>device number</entry>
      </row>
      <row>
       <entry>1</entry>
       <entry>ino</entry>
       <entry>inode number</entry>
      </row>
      <row>
       <entry>2</entry>
       <entry>mode</entry>
       <entry>inode protection mode</entry>
      </row>
      <row>
       <entry>3</entry>
       <entry>nlink</entry>
       <entry>number of links</entry>
      </row>
      <row>
       <entry>4</entry>
       <entry>uid</entry>
       <entry>userid of owner</entry>
      </row>
      <row>
       <entry>5</entry>
       <entry>gid</entry>
       <entry>groupid of owner</entry>
      </row>
      <row>
       <entry>6</entry>
       <entry>rdev</entry>
       <entry>device type, if inode device *</entry>
      </row>
      <row>
       <entry>7</entry>
       <entry>size</entry>
       <entry>size in bytes</entry>
      </row>
      <row>
       <entry>8</entry>
       <entry>atime</entry>
       <entry>time of last access (Unix timestamp)</entry>
      </row>
      <row>
       <entry>9</entry>
       <entry>mtime</entry>
       <entry>time of last modification (Unix timestamp)</entry>
      </row>
      <row>
       <entry>10</entry>
       <entry>ctime</entry>
       <entry>time of last inode change (Unix timestamp)</entry>
      </row>
      <row>
       <entry>11</entry>
       <entry>blksize</entry>
       <entry>blocksize of filesystem IO *</entry>
      </row>
      <row>
       <entry>12</entry>
       <entry>blocks</entry>
       <entry>number of blocks allocated</entry>
      </row>

     </tbody>
    </tgroup>
   </table>

   * Only valid on systems supporting the st_blksize type - other
   systems (e.g. Windows) return -1.
  </para>

  &note.clearstatcache;

  &tip.fopen-wrapper.stat;

  <para>
   See also <function>lstat</function>,
   <function>fstat</function>,
   <function>filemtime</function>, and
   <function>filegroup</function>.
  </para>
 </refsect1>
</refentry>

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