使用in_array和date in if/else的问题

Question

我正在试验PHP的date和in_array函数。

根据我在手册中读过的内容，我无法理解为什么我的代码返回if语句的else部分。如果日期（'D'）正在返回星期二为什么它不运行if部分？

<?php 

date_default_timezone_set('UTC'); 

$weekdays = array("Mon", "Tue", "Wed", "Thur", "Fri", "Sat", "Sun"); 

$today = date('D'); 

if(in_array("Mon", "Tue", "Wed", "Thur", "Fri", $weekdays) == $today) 
    { 
     echo "It's" . " "; 
     echo $today; 
     echo " " . "Get out of bed and go to work"; 
    }else{ 
     echo "Do whatever you want becuase it's" . " "; 
     echo $today; 
}; 
?> 

我已经尝试了各种东西，并且改变了如果一部分，这一点，但无济于事。

if(in_array(array("Mon", "Tue", "Wed", "Thur", "Fri"), $weekdays) == $today) 

有人能告诉我什么语法错？

Answer 1

in_array的功能checks if a value exists in an array, returning true or false。

如果你想知道，如果$today是工作日，你会想要做的事，如：

$weekdays = array("Mon", "Tue", "Wed", "Thur", "Fri"); 
if(in_array($today, $weekdays)) { 
    ... 
} 

Answer 2

if(in_array($today, $weekdays)) 
    { 
     echo "It's" . " "; 
     echo $today; 
     echo " " . "Get out of bed and go to work"; 
    }else{ 
     echo "Do whatever you want becuase it's" . " "; 
     echo $current_day; 
}; 

in_array手册