php将12小时制转换成24小时制的方法，php24小时

<&#63;php
function to_24_hour($hours,$minutes,$seconds,$meridiem){
 $hours = sprintf('%02d',(int) $hours);
 $minutes = sprintf('%02d',(int) $minutes);
 $seconds = sprintf('%02d',(int) $seconds);
 $meridiem = (strtolower($meridiem)=='am') &#63; 'am' : 'pm';
 return date('H:i:s', strtotime("{$hours}:{$minutes}:{$seconds}{$meridiem}"));
}
echo to_24_hour( 1, 2, 3, 'pm' ); // Returns 13:02:03
echo to_24_hour( '02', '30', '00', 'pm' ); // Returns 14:30:00
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