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wp_checkdate()

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

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

Parameters

$monthintrequired
Month number.
$dayintrequired
Day number.
$yearintrequired
Year number.
$source_datestringrequired
The date to filter.

Return

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

Source

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.

UsesDescription
apply_filters()wp-includes/plugin.php

Calls the callback functions that have been added to a filter hook.

Used byDescription
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.

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Changelog

VersionDescription
3.5.0Introduced.

User Contributed Notes

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