Count of circles in a number aka 2581 by clock

<?for(;;)echo strlen(preg_filter('/[\xca-\xce\xc8\xf5]|(\xc7)/',~\xdb\xce\xdb\xce,~fgets(STDIN))),~\xf5;

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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