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1. www.php.net › manual › enPHP: checkdate - Manual

   www.php.net › manual › en

   Validate a Gregorian date Checks the validity of the date formed by the arguments. A date is considered valid if each parameter is properly defined.

   • Date

     Parameters ¶ format Format accepted by...

   • Strftime

     Format the time and/or date according to locale settings....

2. www.w3schools.com › php › func_date_checkdatePHP checkdate () Function - W3Schools

   www.w3schools.com › php › func_date_checkdate

   Learn how to use the PHP checkdate() function to validate a Gregorian date.

3. www.geeksforgeeks.org › php › php-checkdate-functionPHP checkdate () Function - GeeksforGeeks

   www.geeksforgeeks.org › php › php-checkdate-function

   Jul 11, 2025 · The checkdate () function in PHP is an important built-in function used to validate whether a given date is valid or not. It works by checking the values of month, day, and year, and returns true if the date is valid and false otherwise.

4. www.w3resource.com › checkdatePHP: checkdate() function - w3resource

   www.w3resource.com › checkdate

   Oct 8, 2024 · PHP: Validate a Gregorian date The checkdate () is used to validate a Gregorian date. Note : The Gregorian calendar is the internationally accepted civil calendar. It was introduced by Pope Gregory XIII, after whom the calendar was named. Version: (PHP 4 and above) Syntax: checkdate (month, day, year) Parameters:

5. thelinuxcode.com › php-checkdate-function-aPHP checkdate() Function: A Practical, Real‑World Guide to ...

   thelinuxcode.com › php-checkdate-function-a

   Feb 10, 2026 · Dates are the quiet saboteurs of production systems. I’ve seen a payroll export blow up because “2024-02-30” slipped past a front-end date picker, and I’ve seen a subscription renewal job misfire because someone typed “13/01/2025” into a US‑format field. When you’re building real applications—billing, scheduling, inventory, travel, or compliance—you can’t trust raw date ...

6. www.tutorialspoint.com › php › php_function_checkPHP checkdate () Function - Online Tutorials Library

   www.tutorialspoint.com › php › php_function_check

   The checkdate() function accepts the month, day, year of a date as parameters and, verifies whether it is a Gregorian date or not. PHP checkdate() function returns a boolean value.

7. People also ask

   What is checkdate() function in PHP?

   • The checkdate () function in PHP is an important built-in function used to validate whether a given date is valid or not. It works by checking the values of month, day, and year, and returns true if the date is valid and false otherwise. This is particularly useful when you want to ensure a date is correct before performing operations with it.

   PHP checkdate () Function - GeeksforGeeks

   www.geeksforgeeks.org/php/php-checkdate-function/

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   What is checkdate() function?

   • The checkdate () function accepts the month, day, year of a date as parameters and, verifies whether it is a Gregorian date or not. This is an integer value representing the month of a date, it must be between between 1 and 12. This is an integer value representing the day of a date, it must be below the allowed number of days in the given month.

   PHP checkdate () Function - Online Tutorials Library

   www.tutorialspoint.com/php/php_function_checkdate.htm

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   How to check if a Gregorian date is valid in PHP?

   • ❮ PHP Date/Time Reference Check if several dates are valid Gregorian dates: The checkdate () function is used to validate a Gregorian date. Required. Specifies the month as a number between 1 and 12 Required. Specifies the day as a number between 1 and 31 Required. Specifies the year as a number between 1 and 32767 TRUE if the date is valid.

   PHP checkdate () Function - W3Schools

   www.w3schools.com/php/func_date_checkdate.asp

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   What is a checkdate in Gregorian calendar?

   • The checkdate () is used to validate a Gregorian date. Note : The Gregorian calendar is the internationally accepted civil calendar. It was introduced by Pope Gregory XIII, after whom the calendar was named. Version: (PHP 4 and above) Syntax: Parameters: The month is from 1 to 12.

   PHP: checkdate() function - w3resource

   www.w3resource.com/php/function-reference/checkdate.php

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8. www.w3schools.am › php › func_date_checkdatePHP checkdate () Function - w3schools.am

   www.w3schools.am › php › func_date_checkdate

   Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML.