document.write('
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document.write('<?php
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document.write('
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document.write(' //calculate years of age (input string: YYYY-MM-DD)
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document.write(' function age($age){
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document.write(' list($year,$month,$day) = explode("-",$age);
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document.write(' $year_diff = date("Y") - $year;
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document.write(' $month_diff = date("m") - $month;
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document.write(' $day_diff = date("d") - $day;
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document.write(' if ($day_diff < 0 || $month_diff < 0)
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document.write(' $year_diff--;
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document.write(' return $year_diff;
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document.write(' }
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document.write('
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document.write('?>
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document.write('
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document.write('
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