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<?php
/**
* WP_Date_Query will generate a MySQL WHERE clause for the specified date-based parameters.
*
* Initialize the class by passing an array of arrays of parameters.
*
* @link http://codex.wordpress.org/Function_Reference/WP_Query Codex page.
*
* @since 3.7.0
*/
class WP_Date_Query {
/**
* List of date queries.
*
* @since 3.7.0
* @access public
* @var array
*/
public $queries = array();
/**
* The relation between the queries. Can be either 'AND' or 'OR' and can be changed via the query arguments.
*
* @since 3.7.0
* @access public
* @var string
*/
public $relation = 'AND';
/**
* The column to query against. Can be changed via the query arguments.
*
* @since 3.7.0
* @access public
* @var string
*/
public $column = 'post_date';
/**
* The value comparison operator. Can be changed via the query arguments.
*
* @since 3.7.0
* @access public
* @var array
*/
public $compare = '=';
/**
* Constructor.
*
* @param array $date_query {
* One or more associative arrays of date query parameters.
*
* @type array {
* @type string $column Optional. The column to query against. If undefined, inherits the value of
* the $default_column parameter. Default 'post_date'. Accepts 'post_date',
* 'post_date_gmt', 'post_modified','post_modified_gmt', 'comment_date',
* 'comment_date_gmt'.
* @type string $compare Optional. The comparison operator.
* Default '='. Accepts '=', '!=', '>', '>=', '<', '<=', 'IN', 'NOT IN',
* 'BETWEEN', 'NOT BETWEEN'.
* @type string $relation Optional. The boolean relationship between the date queryies.
* Default 'OR'. Accepts 'OR', 'AND'.
* @type array {
* @type string|array $before Optional. Date to retrieve posts before. Accepts strtotime()-compatible
* string, or array of 'year', 'month', 'day' values. {
*
* @type string $year The four-digit year. Default empty. Accepts any four-digit year.
* @type string $month Optional when passing array.The month of the year.
* Default (string:empty)|(array:1). Accepts numbers 1-12.
* @type string $day Optional when passing array.The day of the month.
* Default (string:empty)|(array:1). Accepts numbers 1-31.
* }
* @type string|array $after Optional. Date to retrieve posts before. Accepts strtotime()-compatible
* string, or array of 'year', 'month', 'day' values. {
*
* @type string $year The four-digit year. Default empty. Accepts any four-digit year.
* @type string $month Optional when passing array.The month of the year.
* Default (string:empty)|(array:12). Accepts numbers 1-12.
* @type string $day Optional when passing array.The day of the month.
* Default (string:empty)|(array:last day of month). Accepts numbers 1-31.
* }
* @type string $column Optional. Used to add a clause comparing a column other than the column
* specified in the top-level $column paramater. Default is the value
* of top-level $column. Accepts 'post_date', 'post_date_gmt',
* 'post_modified', 'post_modified_gmt', 'comment_date', 'comment_date_gmt'.
* @type string $compare Optional. The comparison operator. Default '='. Accepts '=', '!=',
* '>', '>=', '<', '<=', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN'.
* @type bool $inclusive Optional. Include results from dates specified in 'before' or 'after'.
* Default. Accepts.
* @type int $year Optional. The four-digit year number. Default empty. Accepts any
* four-digit year.
* @type int $month Optional. The two-digit month number. Default empty. Accepts numbers 1-12.
* @type int $week Optional. The week number of the year. Default empty. Accepts numbers 0-53.
* @type int $dayofyear Optional. The day number of the year. Default empty. Accepts numbers 1-366.
* @type int $day Optional. The day of the month. Default empty. Accepts numbers 1-31.
* @type int $dayofweek Optional. The day number of the week. Default empty. Accepts numbers 1-7.
* @type int $hour Optional. The hour of the day. Default empty. Accepts numbers 0-23.
* @type int $minute Optional. The minute of the hour. Default empty. Accepts numbers 0-60.
* @type int $second Optional. The second of the minute. Default empty. Accepts numbers 0-60.
* }
* }
* }
* @param array $default_column Optional. Default column to query against. Default 'post_date'.
* Accepts 'post_date', 'post_date_gmt', 'post_modified', 'post_modified_gmt',
* 'comment_date', 'comment_date_gmt'.
*/
function __construct( $date_query, $default_column = 'post_date' ) {
if ( empty( $date_query ) || ! is_array( $date_query ) )
return;
if ( isset( $date_query['relation'] ) && strtoupper( $date_query['relation'] ) == 'OR' )
$this->relation = 'OR';
else
$this->relation = 'AND';
if ( ! empty( $date_query['column'] ) )
$this->column = esc_sql( $date_query['column'] );
else
$this->column = esc_sql( $default_column );
$this->column = $this->validate_column( $this->column );
$this->compare = $this->get_compare( $date_query );
// If an array of arrays wasn't passed, fix it
if ( ! isset( $date_query[0] ) )
$date_query = array( $date_query );
$this->queries = array();
foreach ( $date_query as $key => $query ) {
if ( ! is_array( $query ) )
continue;
$this->queries[$key] = $query;
}
}
/**
* Determines and validates what comparison operator to use.
*
* @since 3.7.0
* @access public
*
* @param array $query A date query or a date subquery
* @return string The comparison operator
*/
public function get_compare( $query ) {
if ( ! empty( $query['compare'] ) && in_array( $query['compare'], array( '=', '!=', '>', '>=', '<', '<=', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) )
return strtoupper( $query['compare'] );
return $this->compare;
}
/**
* Validates a column name parameter.
*
* @since 3.7.0
* @access public
*
* @param string $column The user-supplied column name.
* @return string A validated column name value.
*/
public function validate_column( $column ) {
$valid_columns = array(
'post_date', 'post_date_gmt', 'post_modified',
'post_modified_gmt', 'comment_date', 'comment_date_gmt'
);
/**
* Filter the list of valid date query columns.
*
* @since 3.7.0
*
* @param array $valid_columns An array of valid date query columns. Defaults are 'post_date', 'post_date_gmt',
* 'post_modified', 'post_modified_gmt', 'comment_date', 'comment_date_gmt'
*/
if ( ! in_array( $column, apply_filters( 'date_query_valid_columns', $valid_columns ) ) )
$column = 'post_date';
return $column;
}
/**
* Turns an array of date query parameters into a MySQL string.
*
* @since 3.7.0
* @access public
*
* @return string MySQL WHERE parameters
*/
public function get_sql() {
// The parts of the final query
$where = array();
foreach ( $this->queries as $key => $query ) {
$where_parts = $this->get_sql_for_subquery( $query );
if ( $where_parts ) {
// Combine the parts of this subquery into a single string
$where[ $key ] = '( ' . implode( ' AND ', $where_parts ) . ' )';
}
}
// Combine the subquery strings into a single string
if ( $where )
$where = ' AND ( ' . implode( " {$this->relation} ", $where ) . ' )';
else
$where = '';
/**
* Filter the date query WHERE clause.
*
* @since 3.7.0
*
* @param string $where WHERE clause of the date query.
* @param WP_Date_Query $this The WP_Date_Query instance.
*/
return apply_filters( 'get_date_sql', $where, $this );
}
/**
* Turns a single date subquery into pieces for a WHERE clause.
*
* @since 3.7.0
* return array
*/
protected function get_sql_for_subquery( $query ) {
global $wpdb;
// The sub-parts of a $where part
$where_parts = array();
$column = ( ! empty( $query['column'] ) ) ? esc_sql( $query['column'] ) : $this->column;
$column = $this->validate_column( $column );
$compare = $this->get_compare( $query );
$lt = '<';
$gt = '>';
if ( ! empty( $query['inclusive'] ) ) {
$lt .= '=';
$gt .= '=';
}
// Range queries
if ( ! empty( $query['after'] ) )
$where_parts[] = $wpdb->prepare( "$column $gt %s", $this->build_mysql_datetime( $query['after'], true ) );
if ( ! empty( $query['before'] ) )
$where_parts[] = $wpdb->prepare( "$column $lt %s", $this->build_mysql_datetime( $query['before'], false ) );
// Specific value queries
if ( isset( $query['year'] ) && $value = $this->build_value( $compare, $query['year'] ) )
$where_parts[] = "YEAR( $column ) $compare $value";
if ( isset( $query['month'] ) && $value = $this->build_value( $compare, $query['month'] ) )
$where_parts[] = "MONTH( $column ) $compare $value";
// Legacy
if ( isset( $query['monthnum'] ) && $value = $this->build_value( $compare, $query['monthnum'] ) )
$where_parts[] = "MONTH( $column ) $compare $value";
if ( isset( $query['week'] ) && false !== ( $value = $this->build_value( $compare, $query['week'] ) ) )
$where_parts[] = _wp_mysql_week( $column ) . " $compare $value";
// Legacy
if ( isset( $query['w'] ) && false !== ( $value = $this->build_value( $compare, $query['w'] ) ) )
$where_parts[] = _wp_mysql_week( $column ) . " $compare $value";
if ( isset( $query['dayofyear'] ) && $value = $this->build_value( $compare, $query['dayofyear'] ) )
$where_parts[] = "DAYOFYEAR( $column ) $compare $value";
if ( isset( $query['day'] ) && $value = $this->build_value( $compare, $query['day'] ) )
$where_parts[] = "DAYOFMONTH( $column ) $compare $value";
if ( isset( $query['dayofweek'] ) && $value = $this->build_value( $compare, $query['dayofweek'] ) )
$where_parts[] = "DAYOFWEEK( $column ) $compare $value";
if ( isset( $query['hour'] ) || isset( $query['minute'] ) || isset( $query['second'] ) ) {
// Avoid notices
foreach ( array( 'hour', 'minute', 'second' ) as $unit ) {
if ( ! isset( $query[$unit] ) ) {
$query[$unit] = null;
}
}
if ( $time_query = $this->build_time_query( $column, $compare, $query['hour'], $query['minute'], $query['second'] ) ) {
$where_parts[] = $time_query;
}
}
return $where_parts;
}
/**
* Builds and validates a value string based on the comparison operator.
*
* @since 3.7.0
* @access public
*
* @param string $compare The compare operator to use
* @param string|array $value The value
* @return string|int|false The value to be used in SQL or false on error.
*/
public function build_value( $compare, $value ) {
if ( ! isset( $value ) )
return false;
switch ( $compare ) {
case 'IN':
case 'NOT IN':
return '(' . implode( ',', array_map( 'intval', (array) $value ) ) . ')';
case 'BETWEEN':
case 'NOT BETWEEN':
if ( ! is_array( $value ) || 2 != count( $value ) || ! isset( $value[0] ) || ! isset( $value[1] ) )
$value = array( $value, $value );
$value = array_map( 'intval', $value );
return $value[0] . ' AND ' . $value[1];
default;
return (int) $value;
}
}
/**
* Builds a MySQL format date/time based on some query parameters.
*
* You can pass an array of values (year, month, etc.) with missing parameter values being defaulted to
* either the maximum or minimum values (controlled by the $default_to parameter). Alternatively you can
* pass a string that that will be run through strtotime().
*
* @since 3.7.0
* @access public
*
* @param string|array $datetime An array of parameters or a strotime() string
* @param string $default_to Controls what values default to if they are missing from $datetime. Pass "min" or "max".
* @return string|false A MySQL format date/time or false on failure
*/
public function build_mysql_datetime( $datetime, $default_to_max = false ) {
$now = current_time( 'timestamp' );
if ( ! is_array( $datetime ) ) {
// @todo Timezone issues here possibly
return gmdate( 'Y-m-d H:i:s', strtotime( $datetime, $now ) );
}
$datetime = array_map( 'absint', $datetime );
if ( ! isset( $datetime['year'] ) )
$datetime['year'] = gmdate( 'Y', $now );
if ( ! isset( $datetime['month'] ) )
$datetime['month'] = ( $default_to_max ) ? 12 : 1;
if ( ! isset( $datetime['day'] ) )
$datetime['day'] = ( $default_to_max ) ? (int) date( 't', mktime( 0, 0, 0, $datetime['month'], 1, $datetime['year'] ) ) : 1;
if ( ! isset( $datetime['hour'] ) )
$datetime['hour'] = ( $default_to_max ) ? 23 : 0;
if ( ! isset( $datetime['minute'] ) )
$datetime['minute'] = ( $default_to_max ) ? 59 : 0;
if ( ! isset( $datetime['second'] ) )
$datetime['second'] = ( $default_to_max ) ? 59 : 0;
return sprintf( '%04d-%02d-%02d %02d:%02d:%02d', $datetime['year'], $datetime['month'], $datetime['day'], $datetime['hour'], $datetime['minute'], $datetime['second'] );
}
/**
* Builds a query string for comparing time values (hour, minute, second).
*
* If just hour, minute, or second is set than a normal comparison will be done.
* However if multiple values are passed, a pseudo-decimal time will be created
* in order to be able to accurately compare against.
*
* @since 3.7.0
* @access public
*
* @param string $column The column to query against. Needs to be pre-validated!
* @param string $compare The comparison operator. Needs to be pre-validated!
* @param int|null $hour Optional. An hour value (0-23).
* @param int|null $minute Optional. A minute value (0-59).
* @param int|null $second Optional. A second value (0-59).
* @return string|false A query part or false on failure.
*/
public function build_time_query( $column, $compare, $hour = null, $minute = null, $second = null ) {
global $wpdb;
// Have to have at least one
if ( ! isset( $hour ) && ! isset( $minute ) && ! isset( $second ) )
return false;
// Complex combined queries aren't supported for multi-value queries
if ( in_array( $compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) ) {
$return = array();
if ( isset( $hour ) && false !== ( $value = $this->build_value( $compare, $hour ) ) )
$return[] = "HOUR( $column ) $compare $value";
if ( isset( $minute ) && false !== ( $value = $this->build_value( $compare, $minute ) ) )
$return[] = "MINUTE( $column ) $compare $value";
if ( isset( $second ) && false !== ( $value = $this->build_value( $compare, $second ) ) )
$return[] = "SECOND( $column ) $compare $value";
return implode( ' AND ', $return );
}
// Cases where just one unit is set
if ( isset( $hour ) && ! isset( $minute ) && ! isset( $second ) && false !== ( $value = $this->build_value( $compare, $hour ) ) ) {
return "HOUR( $column ) $compare $value";
} elseif ( ! isset( $hour ) && isset( $minute ) && ! isset( $second ) && false !== ( $value = $this->build_value( $compare, $minute ) ) ) {
return "MINUTE( $column ) $compare $value";
} elseif ( ! isset( $hour ) && ! isset( $minute ) && isset( $second ) && false !== ( $value = $this->build_value( $compare, $second ) ) ) {
return "SECOND( $column ) $compare $value";
}
// Single units were already handled. Since hour & second isn't allowed, minute must to be set.
if ( ! isset( $minute ) )
return false;
$format = $time = '';
// Hour
if ( $hour ) {
$format .= '%H.';
$time .= sprintf( '%02d', $hour ) . '.';
} else {
$format .= '0.';
$time .= '0.';
}
// Minute
$format .= '%i';
$time .= sprintf( '%02d', $minute );
if ( isset( $second ) ) {
$format .= '%s';
$time .= sprintf( '%02d', $second );
}
return $wpdb->prepare( "DATE_FORMAT( $column, %s ) $compare %f", $format, $time );
}
}
