How to optimize the array_map function of PHP (how to input parameters)

{Code...} test {code ...}

/** * @param string $hisStart * @param string $hisEnd * @param int    $range * @param string $format * * @return array */function createHisRange($hisStart = '00:00:00', $hisEnd = '23:59:59', $range = 3600, $format = 'H:00:00'){    $t1 = strtotime($hisStart);    $t2 = strtotime($hisEnd);    $arrHis = array();    while($t1 < $t2){        $arrHis[] = date($format,$t1);        $t1 += $range;    }    return $arrHis;//    return array_map(function ($time) {//        return date($format, $time);//    }, range(strtotime($hisStart), strtotime($hisEnd), $range));}

Test

$s = createHisRange();print_r($s);/*Array(    [0] => 00:00:00    [1] => 01:00:00    [2] => 02:00:00    [3] => 03:00:00    [4] => 04:00:00    [5] => 05:00:00    [6] => 06:00:00    [7] => 07:00:00    [8] => 08:00:00    [9] => 09:00:00    [10] => 10:00:00    [11] => 11:00:00    [12] => 12:00:00    [13] => 13:00:00    [14] => 14:00:00    [15] => 15:00:00    [16] => 16:00:00    [17] => 17:00:00    [18] => 18:00:00    [19] => 19:00:00    [20] => 20:00:00    [21] => 21:00:00    [22] => 22:00:00    [23] => 23:00:00)*/

Problem

How to pass $ format to array_map

Reply content:

/** * @param string $hisStart * @param string $hisEnd * @param int    $range * @param string $format * * @return array */function createHisRange($hisStart = '00:00:00', $hisEnd = '23:59:59', $range = 3600, $format = 'H:00:00'){    $t1 = strtotime($hisStart);    $t2 = strtotime($hisEnd);    $arrHis = array();    while($t1 < $t2){        $arrHis[] = date($format,$t1);        $t1 += $range;    }    return $arrHis;//    return array_map(function ($time) {//        return date($format, $time);//    }, range(strtotime($hisStart), strtotime($hisEnd), $range));}

Test

$s = createHisRange();print_r($s);/*Array(    [0] => 00:00:00    [1] => 01:00:00    [2] => 02:00:00    [3] => 03:00:00    [4] => 04:00:00    [5] => 05:00:00    [6] => 06:00:00    [7] => 07:00:00    [8] => 08:00:00    [9] => 09:00:00    [10] => 10:00:00    [11] => 11:00:00    [12] => 12:00:00    [13] => 13:00:00    [14] => 14:00:00    [15] => 15:00:00    [16] => 16:00:00    [17] => 17:00:00    [18] => 18:00:00    [19] => 19:00:00    [20] => 20:00:00    [21] => 21:00:00    [22] => 22:00:00    [23] => 23:00:00)*/

Problem

How to pass $ format to array_map

    return array_map(function ($time) use ($format) {        return date($format, $time);    }, range(strtotime($hisStart), strtotime($hisEnd), $range));

Keywords:Closure

The optimal solution is to use it like @ picasso250.

 return array_map(function ($t) use ($f) {    return date($f, $t);}, range(strtotime($s), strtotime($e), $r));

If you cannot use the use keyword, you can use global:

$format = "H:i:s";function fm($t){    global $format;    return date($format, $time);}array_map('fm', range(strtotime($hisStart), strtotime($hisEnd), $range));

Of course, it is also possible to write this with Class, that is, it looks particularly troublesome...

Class hisRange {    public $s, $e, $r, $f;    function __constructor($s= '00:00:00', $e= '23:59:59', $r= 3600, $f= 'H:00:00') {        $this->s = strtotime($s);        $this->e = strtotime($e);        $this->r = $r;        $this->f = $f;    }    function run() {         return array_map(array($this, 'fm'), range($this->s, $this->e, $this->r));    }    function fm($t) {        return date($this->f, $t);    }}$range = new hisRange();$s = $range->run();

Okay, I just want to provide different solutions...