Getting the day of the week corresponding to a date in PHP can be achieved by using functions such as date() and strftime(). 1. Use the date() or strftime() function to get the week name directly from the timestamp, such as date('l', $timestamp) returns the full week name, date('D', $timestamp) returns the abbreviation, and strftime('%A', $timestamp) returns the localized week name according to the system locale settings. 2. The Chinese week name can be used in setlocale(LC_TIME, 'zh_CN.UTF-8') and then used in strftime(), or the English week name can be mapped into Chinese through a custom array. 3. When processing dates entered by user or in the database, you can use strtotime() to convert the standard format date string to a timestamp, or use DateTime::createFromFormat() to parse non-standard format dates, and then obtain the week name through format('l'). Pay attention to date format, time zone and language settings to avoid errors.

It is not difficult to obtain the day of the week corresponding to the date in PHP. The key is to use the right function. If you already have a date, whether it is a timestamp or a standard date format (such as Ymd ), you can easily get the corresponding week name through some built-in functions.

1. Use date() and strftime() functions

The most common method is to use the two functions date() or strftime() .

• date('l', $timestamp) : Returns the full week name, such as Monday .
• date('D', $timestamp) : Returns the abbreviation form, such as Mon
• strftime('%A', $timestamp) : Similar to date('l') , but will be affected by the system locale settings, and you can output the week name of the local language.

For example:

 $timestamp = strtotime("2025-04-05");
echo date('l', $timestamp); // Output: Friday

If you want to output "Friday" in Chinese, you need to use it in conjunction with setlocale() and strftime() .

2. Tips for getting Chinese weekly names

If the goal is to display the Chinese week name, such as "Monday" or "Friday", you can do this:

 setlocale(LC_TIME, 'zh_CN.UTF-8'); // Set locale $timestamp = strtotime("2025-04-05");
echo strftime('%A', $timestamp); // Output: Friday

What should be noted is:

• The default locale environments of different servers may be different, so make sure that Chinese is supported.
• The locale name formats for Windows and Linux are also slightly different.
• If you just want to simply map English week to Chinese, you can also make an array yourself to convert:

 $weekMap = [
    'Monday' => 'Monday',
    'Tuesday' => 'Tuesday',
    // Other correspondence...
];
echo $weekMap[date('l', $timestamp)];

3. Process user input or database dates

Many times you need to get a date string from user input or database and extract the name of the week from it.

For example, if you fetch a string like 2025-04-05 from the database, you can handle it like this:

 $dateStr = "2025-04-05";
$timestamp = strtotime($dateStr);
echo date('l', $timestamp); // Friday

If the date format is strange, such as dd/mm/yyyy , then you'd better use DateTime::createFromFormat() to parse to avoid errors.

For example:

 $dateStr = "05/04/2025"; // British format: day/month/year $date = DateTime::createFromFormat('d/m/Y', $dateStr);
echo $date->format('l'); // Friday

Basically these are the methods. Although it seems that there are not many steps, you should pay attention to the date format, time zone and language settings, otherwise errors are prone to errors.

The above is the detailed content of php get day name from date. For more information, please follow other related articles on the PHP Chinese website!