Implement the function of pushing down n months from the specified time

Introduction: This is a detailed page for pushing down functions for N months from a specified time. It introduces PHP, related knowledge, skills, experience, and some PHP source code.

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Author: bjbs_270

Some time ago, I made a monthly report statistics and used the topic-like function. I wrote one using the mktime () function, but it was always wrong and depressing. I would like to take some time over the weekend to write one for some villagers.

PHPCode:--------------------------------------------------------------------------------

<?

/*

* Author: Heart Lamp

* Function: implements the function of pushing down n months from the specified time.

* Month ($ ymd, $ Len) $ ymd time, $ Len released several months

* $ Ymd = '2017-01-01 ';

*/

Function month ($ ymd = ', $ Len = '12 '){

$ Month = array ();

$ Lang = $ Lang. "<meta http-equiv = \" Content-Type \ "content = \" text/html; charset = gb2312 \ "> ";

If ($ ymd) {// determine whether the time format is correct

If (! Ereg ("([0-9] {4})-([0-9] {1, 2})-([0-9] {1, 2 })", $ ymd )){

Echo "<SCRIPT> alert ('date format in function parameters'); history. Back () </SCRIPT> ";

Exit;

}

}

If ($ Len ){

If (! Ereg ("[0-9] +", $ Len )){

Echo $ Lang. "<SCRIPT> alert ('invalid time length in the function '); history. Back () </SCRIPT> ";

Exit;

}

}

For ($ I = 0; $ I <$ Len; $ I ++ ){

If ($ I = 0 ){

$ Mktime = $ ymd? Strtotime ($ ymd): Time ();

}

$ Month [] = date ("Y-M", $ mktime); // you can design your desired format as needed.

$ Day = date ("T", $ mktime );

If ($ I = 0)

$ Reday = date ("D", $ mktime );

Else

$ Reday = $ Day;

$ T1 = $ mktime;

$ Mktime = date ("Y-m-d", mktime (date ("H", $ T1), date ("I", $ T1 ), date ("S", $ T1), date ("M", $ T1), date ("D", $ T1)-$ reday, date ("Y ", $ T1 )));

$ Mktime = strtotime ($ mktime );

}

Return $ month;

}

$ Month = month ();

Foreach ($ month as $ key => $ v ){

Echo $ v. "<br> ";

}

?>

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The effect is as follows:

2005-01

2004-12

2004-11

2004-10

2004-09

2004-08

2004-07

2004-06

2004-05

2004-04

2004-03

2004-02

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