PHP verify the validity of time_PHP tutorial

PHP has a built-in function to verify the validity of the date, namely the checkdate function. Let’s share the definition and usage of the checkdate function.

checkdate definition and usage

The checkdate() function verifies a Gregorian date. The function returns true if the specified value is legal, false otherwise.

Dates are legal if:

month is between and including 1 - 12

The value of Day is within the range of days that a given month should have, taking leap years into account.

year is between and including 1 to 32767

checkdate syntax

checkdate(month,day,year)

month required. Specified month.

day required. Specified day.

year required. Specified year.

Usage examples are as follows:

<?php
var_dump(checkdate(12,31,2000));
var_dump(checkdate(2,29,2003));
var_dump(checkdate(2,29,2004));

The result will be output:

bool(true)
bool(false)
bool(true)

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