📄 function.date-sub.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.date-parse.html">date_parse</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.date-sun-info.html">date_sun_info</a></div> <div class="up"><a href="ref.datetime.html">Date/Time Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.date-sub" class="refentry"> <div class="refnamediv"> <h1 class="refname">date_sub</h1> <p class="verinfo">(No version information available, might be only in CVS)</p><p class="refpurpose"><span class="refname">date_sub</span> — <span class="dc-title"> Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object </span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type"><span class="type void">void</span></span> <span class="methodname"><b><b>date_sub</b></b></span> ( <span class="methodparam"><span class="type"><span class="type DateTime">DateTime</span></span> <tt class="parameter">$object</tt></span> , <span class="methodparam"><span class="type"><span class="type DateInterval">DateInterval</span></span> <tt class="parameter">$interval</tt></span> )</div> <p class="para rdfs-comment"> Subtracts the specified <b class="classname">DateInterval</b> object from the specified DateTime object. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"> <i><tt class="parameter">object</tt></i> </span> <dd> <p class="para"> A date as returned by <b class="classname">DateTime</b>. </p> </dd> </dt> <dt> <span class="term"> <i><tt class="parameter">interval</tt></i> </span> <dd> <p class="para"> The amount to be subtracted. For the date use "P3D", "P3M", "P3Y" or a combination of the three e.g. "P2M5D" (Y = Years, M = Months, D = Days.) MUST BE YEAR MONTH DAY FORMAT "P5Y", "P5M2D", "P5Y4D". For the time use "T3H", "T3M", "T3S" or or a combination of the three e.g. "T5H20M" (H = Hours, M = Minutes, S = Seconds). For dateTime us "P5D2M4YT5H20M". The digit before the letter (NOT P or T) can be any amount. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> No value is returned. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>date_sub()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br />$date </span><span style="color: #007700">= new </span><span style="color: #0000BB">DateTime</span><span style="color: #007700">(</span><span style="color: #DD0000">"18-July-2008 16:30:30"</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$date</span><span style="color: #007700">-></span><span style="color: #0000BB">format</span><span style="color: #007700">(</span><span style="color: #DD0000">"d-m-Y H:i:s"</span><span style="color: #007700">).</span><span style="color: #DD0000">'<br />'</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">date_sub</span><span style="color: #007700">(</span><span style="color: #0000BB">$date</span><span style="color: #007700">, new </span><span style="color: #0000BB">DateInterval</span><span style="color: #007700">(</span><span style="color: #DD0000">"P5D"</span><span style="color: #007700">));<br />echo </span><span style="color: #DD0000">'<br />'</span><span style="color: #007700">.</span><span style="color: #0000BB">$date</span><span style="color: #007700">-></span><span style="color: #0000BB">format</span><span style="color: #007700">(</span><span style="color: #DD0000">"d-m-Y"</span><span style="color: #007700">).</span><span style="color: #DD0000">' : 5 Days'</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">date_sub</span><span style="color: #007700">(</span><span style="color: #0000BB">$date</span><span style="color: #007700">, new </span><span style="color: #0000BB">DateInterval</span><span style="color: #007700">(</span><span style="color: #DD0000">"P5M"</span><span style="color: #007700">));<br />echo </span><span style="color: #DD0000">'<br />'</span><span style="color: #007700">.</span><span style="color: #0000BB">$date</span><span style="color: #007700">-></span><span style="color: #0000BB">format</span><span style="color: #007700">(</span><span style="color: #DD0000">"d-m-Y"</span><span style="color: #007700">).</span><span style="color: #DD0000">' : 5 Months'</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">date_sub</span><span style="color: #007700">(</span><span style="color: #0000BB">$date</span><span style="color: #007700">, new </span><span style="color: #0000BB">DateInterval</span><span style="color: #007700">(</span><span style="color: #DD0000">"P5Y"</span><span style="color: #007700">));<br />echo </span><span style="color: #DD0000">'<br />'</span><span style="color: #007700">.</span><span style="color: #0000BB">$date</span><span style="color: #007700">-></span><span style="color: #0000BB">format</span><span style="color: #007700">(</span><span style="color: #DD0000">"d-m-Y"</span><span style="color: #007700">).</span><span style="color: #DD0000">' : 5 Years'</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">date_sub</span><span style="color: #007700">(</span><span style="color: #0000BB">$date</span><span style="color: #007700">, new </span><span style="color: #0000BB">DateInterval</span><span style="color: #007700">(</span><span style="color: #DD0000">"P5Y5M5D"</span><span style="color: #007700">));<br />echo </span><span style="color: #DD0000">'<br />'</span><span style="color: #007700">.</span><span style="color: #0000BB">$date</span><span style="color: #007700">-></span><span style="color: #0000BB">format</span><span style="color: #007700">(</span><span style="color: #DD0000">"d-m-Y"</span><span style="color: #007700">).</span><span style="color: #DD0000">' : 5 Days, 5 Months, 5 Years'</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">date_sub</span><span style="color: #007700">(</span><span style="color: #0000BB">$date</span><span style="color: #007700">, new </span><span style="color: #0000BB">DateInterval</span><span style="color: #007700">(</span><span style="color: #DD0000">"P5YT5H"</span><span style="color: #007700">));<br />echo </span><span style="color: #DD0000">'<br />'</span><span style="color: #007700">.</span><span style="color: #0000BB">$date</span><span style="color: #007700">-></span><span style="color: #0000BB">format</span><span style="color: #007700">(</span><span style="color: #DD0000">"d-m-Y H:i:s"</span><span style="color: #007700">).</span><span style="color: #DD0000">' : 5 Years, 5 Hours'</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <div class="warning"><b class="warning">Warning</b><p class="simpara">This function is<em class="emphasis">EXPERIMENTAL</em>. The behaviour of this function, its name, andsurrounding documentation may change without notice in a future release of PHP.This function should be used at your own risk.</p></div> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.date-add.html" class="function" rel="rdfs-seeAlso">date_add()</a></li> <li class="member"><b>date_diff()</b></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.date-parse.html">date_parse</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.date-sun-info.html">date_sun_info</a></div> <div class="up"><a href="ref.datetime.html">Date/Time Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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