wp_checkdate( int $month, int $day, int $year, string $source_date ): bool

Tests if the supplied date is valid for the Gregorian calendar.

Parameters
Return
Source
Hooks
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User Contributed Notes

Parameters

$month int Required: Month number.
$day int Required: Day number.
$year int Required: Year number.
$source_date string Required: The date to filter.

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Return

bool True if valid date, false if not valid date.

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Source

File: wp-includes/functions.php. View all references

function wp_checkdate( $month, $day, $year, $source_date ) {
	/**
	 * Filters whether the given date is valid for the Gregorian calendar.
	 *
	 * @since 3.5.0
	 *
	 * @param bool   $checkdate   Whether the given date is valid.
	 * @param string $source_date Date to check.
	 */
	return apply_filters( 'wp_checkdate', checkdate( $month, $day, $year ), $source_date );
}

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Hooks

apply_filters( 'wp_checkdate', bool $checkdate, string $source_date )

Filters whether the given date is valid for the Gregorian calendar.

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Uses

Uses
Uses	Description
apply_filters() wp-includes/plugin.php	Calls the callback functions that have been added to a filter hook.

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Used By

Used By
Used By	Description
wp_resolve_post_date() wp-includes/post.php	Uses wp_checkdate to return a valid Gregorian-calendar value for post_date.
wp_validate_site_data() wp-includes/ms-site.php	Validates data for a site prior to inserting or updating in the database.
WP_Date_Query::validate_date_values() wp-includes/class-wp-date-query.php	Validates the given date_query values and triggers errors if something is not valid.
_wp_translate_postdata() wp-admin/includes/post.php	Renames `$_POST` data from form names to DB post columns.
WP_Customize_Manager::save() wp-includes/class-wp-customize-manager.php	Handles customize_save WP Ajax request to save/update a changeset.
WP_Query::parse_query() wp-includes/class-wp-query.php	Parses a query string and sets query type booleans.
redirect_canonical() wp-includes/canonical.php	Redirects incoming links to the proper URL based on the site url.