How to implement the code of what day of the week today is in php

How to implement the day of the week code in php: 1. Determine the day of the week through date and if statements; 2. Determine the day of the week using date and switch statements; 3. Determine the day of the week through date and mb_substr functions.

#The operating environment of this article: Windows 7 system, PHP version 7.4, Dell G3 computer.

How to implement the code of what day of the week today is in php?

PHP implements several ways to write what day of the week today is.

There are many ways to write what day of the week today is. This article has compiled three commonly used ones.

The code is as follows:

// 第一种写法
$da = date("w"); 
if( $da == "1" ){ 
echo "今天是星期一"; 
}else if( $da == "2" ){ 
echo "今天是星期二"; 
}else if( $da == "3" ){ 
echo "今天是星期三"; 
}else if( $da == "4" ){ 
echo "今天是星期四"; 
}else if( $da == "5" ){ 
echo "今天是星期五"; 
}else if( $da == "6" ){ 
echo "今天是星期六"; 
}else if( $da == "0" ){ 
echo "今天是星期日"; 
}else{ 
echo "你输入有误!!"; 
}; 
// 第二种写法 
$ga = date("w"); 
switch( $ga ){ 
case 1 : echo "今天是星期一";break; 
case 2 : echo "今天是星期二";break; 
case 3 : echo "今天是星期三";break; 
case 4 : echo "今天是星期四";break; 
case 5 : echo "今天是星期五";break; 
case 6 : echo "今天是星期六";break; 
case 0 : echo "今天是星期日";break; 
default : echo "你输入有误！"; 
}; www.jbxue.com
// 第三种写法 
echo "今天是星期" . mb_substr( "日一二三四五六",date("w"),1,"utf-8" );

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