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));
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The result will be output:
bool(true)
bool(false)
bool(true)
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