如何将数据库中的日期数组转换为 m/Y 格式？

Question

我有日期数组，如下所示：

Array(
    [0] => 08/03/2017 
    [1] => 09/03/2017 
    [2] => 10/03/2017 
    [3] => 11/03/2017 
    [4] => 12/03/2017 
)
Array(
    [0] => 08/03/2017 
    [1] => 09/03/2017 
    [2] => 10/03/2017 
    [3] => 11/03/2017 
    [4] => 12/03/2017 
    [5] => 01/03/2018 
)
Array(
    [0] => 10/04/2017 
    [1] => 11/04/2017 
    [2] => 12/04/2017 
    [3] => 01/04/2018 
)

我需要将这些数组的每个日期转换为 m/Y 格式。

我需要将 m/d/Y 格式转换为 m/Y 格式，我还需要将其与 m/Y 格式的当前日期进行比较。

while($row=mysql_fetch_array($result)){
    $result_array[] =  ($row['start_date']);
    $result_array1[] = $row['start_date'];
}

有什么方法可以将日期数组 $result_array[ ] 的格式更改为 m/Y 吗？

需要这样的格式输出(m/Y)

Array(
    [0] => 08/2017 
    [1] => 09/2017 
    [2] => 10/2017 
    [3] => 11/2017 
    [4] => 12/2017 
)
Array(
    [0] => 08/2017 
    [1] => 09/2017 
    [2] => 10/2017 
    [3] => 11/2017 
    [4] => 12/2017 
    [5] => 01/2018 
)
Array(
    [0] => 10/2017 
    [1] => 11/2017 
    [2] => 12/2017 
    [3] => 01/2018 
)

Answer 1

php 有几种方法可以解决这个问题，但我的建议是在查询的 SELECT 部分准备日期。

代码：(Demo)

$array1=['08/03/2017','09/03/2017','10/03/2017','11/03/2017','12/03/2017'];
$array2=['08/03/2017','09/03/2017','10/03/2017','11/03/2017','12/03/2017','01/03/2018'];
$array3=['10/04/2017','11/04/2017','12/04/2017','01/04/2018'];

//string function technique:
foreach($array1 as $date){
    $result1[]=substr_replace($date,'',3,3);  // replace {dd/} with an empty string
}
var_export($result1);

echo "\n\n";
// date function technique
foreach($array2 as $date){
    $result2[]=date('m/Y',strtotime($date));
}
var_export($result2);

// mysql function technique *this is the best/cleanest way
$query="SELECT DATE_FORMAT(`date_fieldname`,'%m/%Y') FROM `your_tablename`";  // now prepared in resultset

echo "\n\n";
// make comparisons
$current_mo_year=date('m/Y');
foreach($array3 as $date){
    $date=substr_replace($date,'',3,3);  // prepare however you like
    echo "Comparison between $current_mo_year & $date: ",($date==$current_mo_year?'same':'different'),"\n";
}

输出：

array (
  0 => '08/2017',
  1 => '09/2017',
  2 => '10/2017',
  3 => '11/2017',
  4 => '12/2017',
)

array (
  0 => '08/2017',
  1 => '09/2017',
  2 => '10/2017',
  3 => '11/2017',
  4 => '12/2017',
  5 => '01/2018',
)

Comparison between 11/2017 & 10/2017: different
Comparison between 11/2017 & 11/2017: same
Comparison between 11/2017 & 12/2017: different
Comparison between 11/2017 & 01/2018: different

如何将数据库中的日期数组转换为 m/Y 格式？

How to convert arrays of dates from database into m/Y format?

php

arrays

date

date-formatting

需要这样的格式输出(m/Y)