1、使用date()函数将UNIX时间戳转换为日期。
2、使用strtotime()函数将日期转换为UNIX时间戳。
在PHP中是可以完成日期格式转换的,不过有一个缺点就是占用PHP解析器的解析时间,因此速度会相对慢一些。但是这种方式也有优点,那就是不管是不是数据库中查询获得的数据都可以进行转换,转换范围不受限制。
实例
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$y = date ( "Y" ,time()); //年
$m = date ( "m" ,time()); //月
$d = date ( "d" ,time()); //日
echo $y ."
";
echo $m ."
";
echo $d ."
";
$eight_clock = mktime (8, 0, 0, $m , $d , $y ); //每天8点
echo date ( "Y-m-d H:i:s" , $eight_clock )."
";
$day_time = mktime (0, 0, 0, $m , 1 , $y ); //每月1号
echo date ( "Y-m-d H:i:s" , $day_time )."
";
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实例扩展:
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// convert a date into a string that tells how long ago
// that date was.... eg: 2 days ago, 3 minutes ago.
function ago( $d ) {
$c = getdate ();
$p = array ( 'year' , 'mon' , 'mday' , 'hours' , 'minutes' , 'seconds' );
$display = array ( 'year' , 'month' , 'day' , 'hour' , 'minute' , 'second' );
$factor = array (0, 12, 30, 24, 60, 60);
$d = datetoarr( $d );
for ( $w = 0; $w < 6; $w ++) {
if ( $w > 0) {
$c [ $p [ $w ]] += $c [ $p [ $w -1]] * $factor [ $w ];
$d [ $p [ $w ]] += $d [ $p [ $w -1]] * $factor [ $w ];
}
if ( $c [ $p [ $w ]] - $d [ $p [ $w ]] > 1) {
return ( $c [ $p [ $w ]] - $d [ $p [ $w ]]). ' ' . $display [ $w ]. 's ago' ;
}
}
return '' ;
}
// you can replace this if need be.
// This converts my dates returned from a mysql date string
// into an array object similar to that returned by getdate().
function datetoarr( $d ) {
preg_match( "/([0-9]{4})(\\-)([0-9]{2})(\\-)([0-9]{2})([0-9]{2})(\\:)([0-9]{2})(\\:)([0-9]{2})/" , $d , $matches );
return array (
'seconds' => $matches [10],
'minutes' => $matches [8],
'hours' => $matches [6],
'mday' => $matches [5],
'mon' => $matches [3],
'year' => $matches [1],
);
}
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原文链接:https://www.py.cn/php/jiaocheng/33434.html