PHP,如果今天是星期六或星期日

Question

我正在尝试一个简单的IF语句来显示内容,如果星期几是星期六或星期日.此语句始终返回true.

<?php 
 if(date('D') == ('Sat' || 'Sun')) { 
      echo "Today is Saturday or Sunday.";
    } else {
      echo "Today is not Saturday or Sunday.";
    }
?>

我也尝试过:(Sat || Sun)和(Saturday || Sunday)

这里有什么想法？

日期('D')= Sun

Answer 1

问题是,您必须单独检查条件.

试试这个:

<?php
if(date('D') == 'Sat' || date('D') == 'Sun') { 
  echo "Today is Saturday or Sunday.";
} else {
  echo "Today is not Saturday or Sunday.";
}
?>

date()带'D'参数的函数会返回如Sat日Sun等

Output :今天是周六或周日.

工作代码

Answer 2

您也可以date('N')在Sat = 6和Sun = 7的地方使用

<?php
if(date('N') > 5) { 
    echo "Today is Saturday or Sunday.";
} else {
    echo "Today is not Saturday or Sunday.";
}
?>

Answer 3

您只需使用in_array（）函数即可

<?php
if(in_array(date('D'),['Sat','Sun'])) {
   echo "Today is Saturday or Sunday.";
} else {
   echo "Today is not Saturday or Sunday.";
}