【PHP】日付のよく使用する表記パターンの関数

2023-06-07 611 1528

＜日付表記パターン＞

<?php

function viewDate($date,$style = ""){

    $WEEK = array("日","月","火","水","木","金","土");

    if(isset($date)){

        $date = substr($date,0,10);

        $date = str_replace("/","-",$date);

        if($date != "0000-00-00"){

            list($y,$m,$d) = explode("-",$date);

            $w = date("w", strtotime($date));

            $n = ltrim($m,0);

            $j = ltrim($d,0);

            switch($style){

                case 1: $str = "{$y}年{$n}月"; break;

                case 2: $str = "{$n}月{$j}日({$WEEK[$w]})"; break;

                case 3: $str = "{$y}/{$m}/{$d}"; break;

                case 4: $str = "{$n}/{$j}({$WEEK[$w]})"; break;

                case 5: $str = "{$y}"; break;

                case 6: $str = "{$n}月{$j}日"; break;

                case 7: $str = "{$m}/{$n}/{$j}"; break;

                case 8: $str = "{$y}年{$n}月{$j}日({$WEEK[$w]})"; break;

                case 9: $str = "{$y}/{$n}/{$j}({$WEEK[$w]})"; break;

                default: $str = "{$y}年{$n}月{$j}日";

            }

            return $str;

        }

    }

}



$date = "2023-06-07 12:00:00";

echo viewDate($date,8);　//結果　2023年6月7日(水)

?>

PHP8の環境下ではmktime関数のタイムスタンプ取得はエラーが起きました。
曜日の取得はstrtotime関数で行うのが簡単。

<?php

//php8で期限切れ

$timestamp = mktime(0, 0, 0, $m, $d, $y);

$w = date("w", $timestamp);



//曜日の取得はstrtotimeが明瞭

$w = date("w", strtotime($date));

?>