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@ 2014-02-17T23:45:09Z

<?php

if (class_exists('DateTime') && method_exists('DateTime', 'sub')) {
	$d = new DateTime('2014W02');
	echo $d->sub(new DateInterval('P1W'))->format('r'), PHP_EOL;
}

Output
Performance
VLD
References
Branches

class_exists: documentation ( source)
method_exists: documentation ( source)

preferences:dark modelive preview

35.19 ms | 402 KiB | 5 Q