在PHP中按日期对多维数组排序
我想用PHP按日期对数组排序,然后用JSON输出。我的数组包含很多“帖子”。下面是当我对当前数组进行json_编码并将其作为json进行回显时它当前的显示方式。我想我可能必须使用usort(),但我不确定如何使用 我试过这个建议,但对我不起作用。请任何人帮忙。谢谢在PHP中按日期对多维数组排序,php,json,multidimensional-array,Php,Json,Multidimensional Array,我想用PHP按日期对数组排序,然后用JSON输出。我的数组包含很多“帖子”。下面是当我对当前数组进行json_编码并将其作为json进行回显时它当前的显示方式。我想我可能必须使用usort(),但我不确定如何使用 我试过这个建议,但对我不起作用。请任何人帮忙。谢谢 { "post": [ { "title": "Title 1", "date": { "strdate": "2013-04-09", "day
{
"post": [
{
"title": "Title 1",
"date": {
"strdate": "2013-04-09",
"dayname": "Tue"
}
},
{
"title": "Title 2",
"date": {
"strdate": "2013-04-08",
"dayname": "Mon"
}
}
]
}
我的PHP数组如下所示:
<?php
Array
(
["post"] => Array
(
[0] => Array
(
["title"] => Title
["date"] => Array
(
["strdate"] => 2013-04-09
["month"] => 04
["dayname"] => Tue
)
)
[1] => Array
(
["title"] => Title2
["date"] => Array
(
["strdate"] => 2013-04-08
["dayname"] => Mon
)
)
)
)
?>
从
函数mysort($a,$b)
{
return(strotime($b['timestamp'])-strotime($a['timestamp']);
}
//将第一个日期和时间转换为UNIX时间戳
$t1=mktime(2,30,0,7,1,2011);
$t2=mktime(3,30,0,7,1,2011);
$t3=mktime(4,30,0,7,1,2011);
//将数据存储到多维数组中
$testArray=数组(
“testing3”=>数组(“时间戳”=>t1美元,
“名称”=>“测试3”),
“测试”=>数组(“时间戳”=>t2美元,
“名称”=>“测试”),
“testing2”=>数组(“时间戳”=>t3美元,
“名称”=>“测试2”)
);
usort($testArray,'mysort');
回声“;
打印(测试阵列);
回声“
";
foreach($testArray作为$row){
$date=$row['timestamp'];
回显日期(“d/m/y:H:i:SA”,$date)。”
";
}
另见:
usort($array['post'], function ($a, $b) {
return strtotime($b['date']['strdate']) - strtotime($a['date']['strdate']);
});
function mysort($a, $b)
{
return(strtotime($b['timestamp']) - strtotime($a['timestamp']));
}
// Convert first date & time to UNIX timestamp
$t1 = mktime(2, 30, 0, 7, 1, 2011);
$t2 = mktime(3, 30, 0, 7, 1, 2011);
$t3 = mktime(4, 30, 0, 7, 1, 2011);
// Store data to a Multidimensional Arrays
$testArray = array(
"testing3" => array("timestamp" => $t1,
"name" =>"testing3"),
"testing" => array("timestamp" => $t2,
"name" =>"testing"),
"testing2" => array("timestamp" => $t3,
"name" =>"testing2")
);
usort($testArray, 'mysort');
echo "<pre>";
print_r($testArray);
echo "
";
foreach($testArray AS $row){
$date = $row['timestamp'];
echo date("d/m/y : H:i:s a",$date)."
";
}