imap_fetchheaderPHP ManualPrevNextimap_fetchheaderimap_fetchheader -- Returns header for a messageDescriptionstring imap_fetchheader(int imap_stream, int msgno, int flags);&#13;     This function causes a fetch of the complete, unfiltered 
     RFC822
     format header of the specified message as a text string and
     returns that text string.
    &#13;     The options are:
     
FT_UID&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The&nbsp;msgno&nbsp;argument&nbsp;is&nbsp;a&nbsp;UID&nbsp;
FT_INTERNAL&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The&nbsp;return&nbsp;string&nbsp;is&nbsp;in&nbsp;"internal"&nbsp;format,
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;without&nbsp;any&nbsp;attempt&nbsp;to&nbsp;canonicalize&nbsp;to&nbsp;CRLF
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;newlines
FT_PREFETCHTEXT&nbsp;The&nbsp;RFC822.TEXT&nbsp;should&nbsp;be&nbsp;pre-fetched&nbsp;at&nbsp;the
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;same&nbsp;time.&nbsp;&nbsp;This&nbsp;avoids&nbsp;an&nbsp;extra&nbsp;RTT&nbsp;on&nbsp;an
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IMAP&nbsp;connection&nbsp;if&nbsp;a&nbsp;full&nbsp;message&nbsp;text&nbsp;is
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;desired&nbsp;(e.g.&nbsp;in&nbsp;a&nbsp;"save&nbsp;to&nbsp;local&nbsp;file"
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;operation)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
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