php_date.asp

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    <th align="left" valign="top" width="80%">Description</th>
  </tr>  
  <tr>
    <td valign="top">format</td>
    <td valign="top">Required. Specifies 
	the format of the timestamp</td>
  </tr>
  <tr>
    <td valign="top">timestamp</td>
    <td valign="top">Optional. Specifies a timestamp. Default is the current 
	date and time (as a timestamp)</td>
  </tr>
  </table>
<br />
<hr />

<h2>PHP Date - What is a Timestamp?</h2>
<p>A timestamp is the number of seconds since January 1, 1970 at 00:00:00 GMT. 
This is also known as the Unix Timestamp.</p>
<hr />

<h2>PHP Date - Format the Date</h2>
<p>The first parameter in the date() function specifies how to format the 
date/time. It uses letters to represent date and time formats. Here are some of 
the letters that can be used:</p>
<ul>
	<li>d - The day of the month (01-31) </li>
	<li>m - The current month, as a number (01-12)</li>
	<li>Y - The current year in four digits</li>
</ul>
<p>An overview of all the letters that can be used in the format parameter, can 
be found in our <a href="php_ref_date.asp">PHP Date reference</a>.</p>
<p>Other characters, like&quot;/&quot;, &quot;.&quot;, or &quot;-&quot; can also be inserted between the 
letters to add additional formatting:</p>
<table width="100%" border="1" class="ex" cellspacing="0" id="table2"><tr><td>
<pre>&lt;?php
echo date(&quot;Y/m/d&quot;);
echo &quot;&lt;br /&gt;&quot;;
echo date(&quot;Y.m.d&quot;);
echo &quot;&lt;br /&gt;&quot;;
echo date(&quot;Y-m-d&quot;);
?&gt;</pre>
</td></tr></table>
<p>The output of the code above could be something like this:</p>
<table width="100%" border="1" class="ex" cellspacing="0" id="table3"><tr><td>
<pre>2006/07/11
2006.07.11
2006-07-11</pre>
</td></tr></table>
<br />
<hr />

<h2>PHP Date - Adding a Timestamp</h2>
<p>
The second parameter in the date() function specifies a timestamp. This 
parameter is optional. If you do not supply a timestamp, the 
current time will be used.</p>
<p>
In our next example we will use the mktime() function to create a timestamp for tomorrow.</p>
<p>
The mktime() function returns the Unix timestamp for a specified date.</p>
<h3>Syntax</h3>
<table width="100%" border="1" class="ex" cellspacing="0" id="table4"><tr><td>
<pre>mktime(hour,minute,second,month,day,year,is_dst)</pre>
</td></tr></table>
<p>
To go 
one day in the future we simply add one to the day argument of mktime():</p>
<table width="100%" border="1" class="ex" cellspacing="0" id="table5"><tr><td>
<pre>&lt;?php
$tomorrow = mktime(0,0,0,date(&quot;m&quot;),date(&quot;d&quot;)+1,date(&quot;Y&quot;));<br />echo &quot;Tomorrow is &quot;.date(&quot;Y/m/d&quot;, $tomorrow);
?&gt;</pre>
</td></tr></table>
<p>The output of the code above could be something like this:</p>
<table width="100%" border="1" class="ex" cellspacing="0" id="table6"><tr><td>
<pre>Tomorrow is 2006/07/12</pre>
</td></tr></table>
<br />
<hr />

<h2>PHP Date - Reference</h2>
<p>For more information about all the PHP date functions, please visit our
<a href="php_ref_date.asp">PHP Date Reference</a>.</p>
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