PHP simulates two SQL Server Functions: dateadd (), datediff ()

Source: Internet
Author: User
Tags date1
<? PHP

// File name: Date. Inc. php3

// Before using these two functions, convert the date or date to the timestamp type.

// For example:

// $ Today = mktime (0, 0, 0, date ("M"), date ("D"), date ("Y "));


/***** Simulate the dateadd function in sqlserver *******

$ Part type: String

Value Range: year, month, day, hour, Min, Sec

Indicates the part of the date to be added.

$ N type: Value

Indicates the amount to be added. You can decide which part to add based on $ part.

Negative

$ Datetime type: Timestamp

Indicates the base number to be added.

Return type: Timestamp

**************/

Function dateadd ($ part, $ N, $ datetime ){

$ Year = date ("Y", $ datetime );

$ Month = date ("M", $ datetime );

$ Day = date ("D", $ datetime );

$ Hour = date ("H", $ datetime );

$ Min = date ("I", $ datetime );

$ Sec = date ("S", $ datetime );

$ Part = strtolower ($ part );

$ Ret = 0;

Switch ($ part ){

Case "year ":

$ Year + = $ N;

Break;

Case "month ":

$ Month + = $ N;

Break;

Case "day ":

$ Day + = $ N;

Break;

Case "Hour ":

$ Hour + = $ N;

Break;

Case "min ":

$ Min + = $ N;

Break;

Case "Sec ":

$ Sec + = $ N;

Break;

Default:

Return $ ret;

Break;

}

$ Ret = mktime ($ hour, $ min, $ sec, $ month, $ day, $ year );

Return $ ret;

}


/***** Simulate the datediff function in sqlserver *******

$ Part type: String

Value Range: year, month, day, hour, Min, Sec

Indicates the part of the date to be added.

$ Date1, $ date2 type: Timestamp

Two dates to be compared

Return type: Numeric Value

* ************** End *(*************/

Function datediff ($ part, $ date1, $ date2 ){

// $ Diff = $ date2-$ date1;

$ Year1 = date ("Y", $ date1 );

$ Year2 = date ("Y", $ date2 );

$ Mon2nd = date ("M", $ date2 );

$ Month1 = date ("M", $ date1 );

$ Day2 = date ("D", $ date2 );

$ Day1 = date ("D", $ date1 );

$ Hour2 = date ("D", $ date2 );

$ Hour1 = date ("D", $ date1 );

$ Min2 = date ("I", $ date2 );

$ Min1 = date ("I", $ date1 );

$ Sec2 = date ("S", $ date2 );

$ Sec1 = date ("S", $ date1 );


$ Part = strtolower ($ part );

$ Ret = 0;

Switch ($ part ){

Case "year ":

$ Ret = $ year2-$ year1;

Break;

Case "month ":

$ Ret = ($ year2-$ year1) * 12 + $ mon2s-$ month1;

Break;

Case "day ":

$ Ret = (mktime (, 0, $ mon2, $ day2, $ year2)-mktime (, 0, $ month1, $ day1, $ year1 )) /(24x3600 );

Break;

Case "Hour ":

$ Ret = (mktime ($ hour2, $ mon2, $ day2, $ year2)-mktime ($ hour1, $ month1, $ day1, $ year1 )) /3600;

Break;

Case "min ":

$ Ret = (mktime ($ hour2, $ min2, 0, $ mon2, $ day2, $ year2)-mktime ($ hour1, $ min1, 0, $ month1, $ day1, $ year1)/60;

Break;

Case "Sec ":

$ Ret = $ date2-$ date1;

Break;

Default:

Return $ ret;

Break;

}

Return $ ret;

}

?>
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