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PHP checkdate() Function

PHP checkdate() function is used to check the validity of the date passed in the arguments. It accepts the date in the format of mm/dd/yyyy. It returns a boolean value which is true if the date is a valid one, else it returns false.

Syntax:

  checkdate( $month, $day, $year );

Parameter Values

Parameter	Description
month	This is a required parameter. This parameter defines month as a number between 1 to 12.
day	This is a required parameter. This parameter defines the day as a number between 1 to 31.
year	This is a required parameter. This parameter defines the year as a number between 1 to 32767.

Here is an example of checkdate() function in PHP:

<html>
<body>

<?php

var_dump(checkdate(31,01,2020));  // wrong format
echo "<br>";
var_dump(checkdate(10,06,1999)); // right format

?>

</body>
</html>

Output:
bool(false)
bool(true)

Here is another example of checkdate() function in PHP:

<html>
<body>

<?php

var_dump(checkdate(12,32,2010));  // invalid day value
echo "<br>";
var_dump(checkdate(12,31,2020));  // valid values
echo "<br>";

?>

</body>
</html>

Output:
bool(false)
bool(true)

PHP Date Time Functions

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