File: function.mktime.html

package info (click to toggle)
php3 3%3A3.0.18-0potato1.1
links: PTS
area: main
in suites: potato
size: 17,736 kB
ctags: 11,198
sloc: ansic: 108,120; sh: 2,512; php: 2,024; yacc: 1,887; makefile: 1,038; perl: 537; pascal: 238; awk: 90; cpp: 28; sql: 11
file content (348 lines) | stat: -rw-r--r-- 5,633 bytes
parent folder | download | duplicates (3)
<HTML
><HEAD
><TITLE
>mktime</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.57"><LINK
REL="HOME"
TITLE="PHP Manual"
HREF="manual.html"><LINK
REL="UP"
TITLE="Date and Time functions"
HREF="ref.datetime.html"><LINK
REL="PREVIOUS"
TITLE="microtime"
HREF="function.microtime.html"><LINK
REL="NEXT"
TITLE="strftime"
HREF="function.strftime.html"><META
NAME="HTTP_EQUIV"
CONTENT="text/html; charset=ISO-8859-1"></HEAD
><BODY
CLASS="refentry"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>PHP Manual</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="function.microtime.html"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="function.strftime.html"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="function.mktime"
>mktime</A
></H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN9417"
></A
><P
>    (PHP3 , PHP4 )</P
>mktime&nbsp;--&nbsp;Get UNIX timestamp for a date</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN9420"
></A
><H2
>Description</H2
><DIV
CLASS="funcsynopsis"
><A
NAME="AEN9422"
></A
><P
></P
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="function"
>mktime</B
></CODE
> (int hour, int minute, int second, int month, int day, int year [, int 
       is_dst])</CODE
></P
><P
></P
></DIV
><P
>&#13;     <I
CLASS="emphasis"
>Warning:</I
> Note the strange order of
     arguments, which differs from the order of arguments in a regular
     UNIX mktime() call and which does not lend itself well to leaving
     out parameters from right to left (see below). It is a common
     error to mix these values up in a script.
    </P
><P
>&#13;     Returns the Unix timestamp corresponding to the arguments
     given. This timestamp is a long integer containing the number of
     seconds between the Unix Epoch (January 1 1970) and the time
     specified.
    </P
><P
>&#13;     Arguments may be left out in order from right to left; any
     arguments thus omitted will be set to the current value according
     to the local date and time.
    </P
><P
>&#13;     <TT
CLASS="parameter"
><I
>Is_dst</I
></TT
> can be set to 1 if the time is
     during daylight savings time, 0 if it is not, or -1 (the default)
     if it is unknown whether the time is within daylight savings time
     or not.
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
      <TT
CLASS="parameter"
><I
>Is_dst</I
></TT
> was added in 3.0.10.
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     <B
CLASS="function"
>Mktime()</B
> is useful for doing date arithmetic
     and validation, as it will automatically calculate the correct
     value for out-of-range input. For example, each of the following
     lines produces the string "Jan-01-1998".
     <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN9452"
></A
><P
><B
>Example 1. <B
CLASS="function"
>Mktime()</B
> example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="programlisting"
>&#13;echo date ("M-d-Y", mktime (0,0,0,12,32,1997));
echo date ("M-d-Y", mktime (0,0,0,13,1,1997));
echo date ("M-d-Y", mktime (0,0,0,1,1,1998));
echo date ("M-d-Y", mktime (0,0,0,1,1,98));
      </PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
     <TT
CLASS="parameter"
><I
>Year</I
></TT
> may be a two or four digit value,
     with values between 0-69 mapping to 2000-2069 and 70-99 to
     1970-1999 (on systems where time_t is a 32bit signed integer, as
     most common today, the valid range for
     <TT
CLASS="parameter"
><I
>year</I
></TT
> is somewhere between 1902 and 2037).
    </P
><P
>&#13;     The last day of any given month can be expressed as the "0" day
     of the next month, not the -1 day. Both of the following examples
     will produce the string "The last day in Feb 2000 is: 29".
     <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN9459"
></A
><P
><B
>Example 2. Last day of next month</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="programlisting"
>&#13;$lastday = mktime (0,0,0,3,0,2000);
echo strftime ("Last day in Feb 2000 is: %d", $lastday);
     
$lastday = mktime (0,0,0,4,-31,2000);
echo strftime ("Last day in Feb 2000 is: %d", $lastday);
      </PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
    </P
><P
>&#13;    Date with year, month and day equal to zero is considered illegal 
    (otherwise it what be regarded as 30.11.1999, which would be strange
     behaviour).
    </P
><P
>&#13;     See also <A
HREF="function.date.html"
><B
CLASS="function"
>date()</B
></A
> and <A
HREF="function.time.html"
><B
CLASS="function"
>time()</B
></A
>.
    </P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="function.microtime.html"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="manual.html"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="function.strftime.html"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>microtime</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ref.datetime.html"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>strftime</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>