How to limit results to only future date in php

How to limit result to today date.

E.g. we have three dates in this format (Y-m-d H:i:s):

$a = "2011-08-10 23:55:01";
$b = "2011-08-10 00:20:01";
$c = "2011-08-10 09:45:01";

and I don't want to 开发者_如何学编程echo dates that are past. I want just future dates to be shown.

How to make if then statement for future dates only?

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Use the strtotime function and compare with the current time given by the time function:

if (strtotime($a) > time()) {
  echo $a;
}

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Because I can't see if you're using this in a function somewhere, I chose to concatenate the dates into an array, and work with the array using a foreach:

$a = "2011-08-10 23:55:01";
$b = "2011-08-10 00:20:01";
$c = "2012-08-10 09:45:01";

$dates = array($a,$b,$c);

echo "<ul>";
foreach($dates as $k => $v) {
    if (strtotime($v) > time()){
        echo "<li>$v</li>";
        }
    }
echo "</ul>";

The above, at the time of writing, outputs:

• 2011-08-10 23:55:01
• 2012-08-10 09:45:01

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if (strtotime($a) > time()) {
    echo $a;
}