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ytkhs/file0.php

Created March 6, 2017 11:29
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phpでプレミアムフライデーかどうか判定する ref: http://qiita.com/qube81/items/9d17ddc4aa8ffb276bc9
Raw
file0.php
<?php
function is_premium_friday(Datetime $date) {
return $date->diff(new DateTime(sprintf('last Fri of %s', $date->format('Y-m'))))->format('%d') == 0;
}
var_dump(is_premium_friday(new Datetime('2017-02-23'))); // false
var_dump(is_premium_friday(new Datetime('2017-02-24'))); // true
var_dump(is_premium_friday(new Datetime('2017-02-25'))); // false
var_dump(is_premium_friday(new Datetime('2017-03-31'))); // true
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