PHP cal_days_in_month() º¯Êý

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<?php
$d=cal_days_in_month(CAL_GREGORIAN,2,2016);
echo "2016 Äê 2 ÔÂÓÐ $d Ìì¡£";
?>

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cal_days_in_month(calendar,month,year);
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calendar ±ØÐè¡£¹æ¶¨ÒªÊ¹ÓõÄÀú·¨¡£Çë²ÎÔÄ PHP Calendar ³£Á¿¡£
month ±ØÐè¡£¹æ¶¨Ñ¡¶¨Àú·¨ÖеÄÔ¡£
year ±ØÐè¡£¹æ¶¨Ñ¡¶¨Àú·¨ÖеÄÄê¡£

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