WordPress/wp-includes/date.php

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<?php
/**
* Class for generating SQL clauses that filter a primary query according to date.
*
* `WP_Date_Query` is a helper that allows primary query classes, such as {@see WP_Query},
* to filter their results by date columns, by generating `WHERE` subclauses to be attached
* to the primary SQL query string.
*
* @link http://codex.wordpress.org/Function_Reference/WP_Query Codex page.
*
* @since 3.7.0
*/
class WP_Date_Query {
/**
* Array of date queries.
*
* See {@see WP_Date_Query::__construct()} for information on date query arguments.
*
* @since 3.7.0
* @access public
* @var array
*/
public $queries = array();
/**
* The default relation between top-level queries. Can be either 'AND' or 'OR'.
*
* @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 = '=';
/**
* Supported time-related parameter keys.
*
* @since 4.1.0
* @access public
* @var array
*/
public $time_keys = array( 'after', 'before', 'year', 'month', 'monthnum', 'week', 'w', 'dayofyear', 'day', 'dayofweek', 'hour', 'minute', 'second' );
/**
* Constructor.
*
* @since 3.7.0
* @since 4.0.0 The $inclusive logic was updated to include all times within the date range.
* @access public
*
* @param array $date_query {
* Array of date query clauses.
*
* @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.
* Accepts '=', '!=', '>', '>=', '<', '<=', 'IN', 'NOT IN'. Default '='.
* 'BETWEEN', 'NOT BETWEEN'.
* @type string $relation Optional. The boolean relationship between the date queries.
* Accepts 'OR', 'AND'. Default 'OR'.
* @type array {
Optional. An array of first-order clause parameters, or another fully-formed date query.
* @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 after. 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 parameter. 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'.
*/
public function __construct( $date_query, $default_column = 'post_date' ) {
if ( isset( $date_query['relation'] ) && 'OR' === strtoupper( $date_query['relation'] ) ) {
$this->relation = 'OR';
} else {
$this->relation = 'AND';
}
if ( ! is_array( $date_query ) ) {
return;
}
// Support for passing time-based keys in the top level of the $date_query array.
if ( ! isset( $date_query[0] ) && ! empty( $date_query ) ) {
$date_query = array( $date_query );
}
if ( empty( $date_query ) ) {
return;
}
if ( ! empty( $date_query['column'] ) ) {
$date_query['column'] = esc_sql( $date_query['column'] );
} else {
$date_query['column'] = esc_sql( $default_column );
}
$this->column = $this->validate_column( $this->column );
$this->compare = $this->get_compare( $date_query );
$this->queries = $this->sanitize_query( $date_query );
return;
}
/**
* Recursive-friendly query sanitizer.
*
* Ensures that each query-level clause has a 'relation' key, and that
* each first-order clause contains all the necessary keys from
* $defaults.
*
* @since 4.1.0
* @access public
*
* @param array $query A tax_query query clause.
* @return array Sanitized queries.
*/
public function sanitize_query( $queries, $parent_query = null ) {
$cleaned_query = array();
$defaults = array(
'column' => 'post_date',
'compare' => '=',
'relation' => 'AND',
);
// Numeric keys should always have array values.
foreach ( $queries as $qkey => $qvalue ) {
if ( is_numeric( $qkey ) && ! is_array( $qvalue ) ) {
unset( $queries[ $qkey ] );
}
}
// Each query should have a value for each default key. Inherit from the parent when possible.
foreach ( $defaults as $dkey => $dvalue ) {
if ( isset( $queries[ $dkey ] ) ) {
continue;
}
if ( isset( $parent_query[ $dkey ] ) ) {
$queries[ $dkey ] = $parent_query[ $dkey ];
} else {
$queries[ $dkey ] = $dvalue;
}
}
foreach ( $queries as $key => $q ) {
if ( ! is_array( $q ) || in_array( $key, $this->time_keys, true ) ) {
// This is a first-order query. Trust the values and sanitize when building SQL.
$cleaned_query[ $key ] = $q;
} else {
// Any array without a time key is another query, so we recurse.
$cleaned_query[] = $this->sanitize_query( $q, $queries );
}
}
return $cleaned_query;
}
/**
* Determine whether this is a first-order clause.
*
* Checks to see if the current clause has any time-related keys.
* If so, it's first-order.
*
* @param array $query Query clause.
* @return bool True if this is a first-order clause.
*/
protected function is_first_order_clause( $query ) {
$time_keys = array_intersect( $this->time_keys, array_keys( $query ) );
return ! empty( $time_keys );
}
/**
* 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;
}
/**
* Generate WHERE clause to be appended to a main query.
*
* @since 3.7.0
* @access public
*
* @return string MySQL WHERE clause.
*/
public function get_sql() {
$sql = $this->get_sql_clauses();
$where = $sql['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 );
}
/**
* Generate SQL clauses to be appended to a main query.
*
* Called by the public {@see WP_Date_Query::get_sql()}, this method
* is abstracted out to maintain parity with the other Query classes.
*
* @since 4.1.0
* @access protected
*
* @return array {
* Array containing JOIN and WHERE SQL clauses to append to the main query.
*
* @type string $join SQL fragment to append to the main JOIN clause.
* @type string $where SQL fragment to append to the main WHERE clause.
* }
*/
protected function get_sql_clauses() {
$sql = $this->get_sql_for_query( $this->queries );
if ( ! empty( $sql['where'] ) ) {
$sql['where'] = ' AND ' . $sql['where'];
}
return $sql;
}
/**
* Generate SQL clauses for a single query array.
*
* If nested subqueries are found, this method recurses the tree to
* produce the properly nested SQL.
*
* @since 4.1.0
* @access protected
*
* @param array $query Query to parse.
* @param int $depth Optional. Number of tree levels deep we currently are.
* Used to calculate indentation.
* @return array {
* Array containing JOIN and WHERE SQL clauses to append to a single query array.
*
* @type string $join SQL fragment to append to the main JOIN clause.
* @type string $where SQL fragment to append to the main WHERE clause.
* }
*/
protected function get_sql_for_query( $query, $depth = 0 ) {
$sql_chunks = array(
'join' => array(),
'where' => array(),
);
$sql = array(
'join' => '',
'where' => '',
);
$indent = '';
for ( $i = 0; $i < $depth; $i++ ) {
$indent .= " ";
}
foreach ( $query as $key => $clause ) {
if ( 'relation' === $key ) {
$relation = $query['relation'];
} else if ( is_array( $clause ) ) {
// This is a first-order clause.
if ( $this->is_first_order_clause( $clause ) ) {
$clause_sql = $this->get_sql_for_clause( $clause, $query );
$where_count = count( $clause_sql['where'] );
if ( ! $where_count ) {
$sql_chunks['where'][] = '';
} else if ( 1 === $where_count ) {
$sql_chunks['where'][] = $clause_sql['where'][0];
} else {
$sql_chunks['where'][] = '( ' . implode( ' AND ', $clause_sql['where'] ) . ' )';
}
$sql_chunks['join'] = array_merge( $sql_chunks['join'], $clause_sql['join'] );
// This is a subquery, so we recurse.
} else {
$clause_sql = $this->get_sql_for_query( $clause, $depth + 1 );
$sql_chunks['where'][] = $clause_sql['where'];
$sql_chunks['join'][] = $clause_sql['join'];
}
}
}
// Filter to remove empties.
$sql_chunks['join'] = array_filter( $sql_chunks['join'] );
$sql_chunks['where'] = array_filter( $sql_chunks['where'] );
if ( empty( $relation ) ) {
$relation = 'AND';
}
// Filter duplicate JOIN clauses and combine into a single string.
if ( ! empty( $sql_chunks['join'] ) ) {
$sql['join'] = implode( ' ', array_unique( $sql_chunks['join'] ) );
}
// Generate a single WHERE clause with proper brackets and indentation.
if ( ! empty( $sql_chunks['where'] ) ) {
$sql['where'] = '( ' . "\n " . $indent . implode( ' ' . "\n " . $indent . $relation . ' ' . "\n " . $indent, $sql_chunks['where'] ) . "\n" . $indent . ')';
}
return $sql;
}
/**
* Turns a single date clause into pieces for a WHERE clause.
*
* A wrapper for get_sql_for_clause(), included here for backward
* compatibility while retaining the naming convention across Query classes.
*
* @since 3.7.0
* @access protected
*
* @param array $query Date query arguments.
* @return array {
* Array containing JOIN and WHERE SQL clauses to append to the main query.
*
* @type string $join SQL fragment to append to the main JOIN clause.
* @type string $where SQL fragment to append to the main WHERE clause.
* }
*/
protected function get_sql_for_subquery( $query ) {
return $this->get_sql_for_clause( $query, '' );
}
/**
* Turns a first-order date query into SQL for a WHERE clause.
*
* @since 4.1.0
* @access protected
*
* @param array $query Date query clause.
* @param array $parent_query Parent query of the current date query.
* @return array {
* Array containing JOIN and WHERE SQL clauses to append to the main query.
*
* @type string $join SQL fragment to append to the main JOIN clause.
* @type string $where SQL fragment to append to the main WHERE clause.
* }
*/
protected function get_sql_for_clause( $query, $parent_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 );
$inclusive = ! empty( $query['inclusive'] );
// Assign greater- and less-than values.
$lt = '<';
$gt = '>';
if ( $inclusive ) {
$lt .= '=';
$gt .= '=';
}
// Range queries.
if ( ! empty( $query['after'] ) )
$where_parts[] = $wpdb->prepare( "$column $gt %s", $this->build_mysql_datetime( $query['after'], ! $inclusive ) );
if ( ! empty( $query['before'] ) )
$where_parts[] = $wpdb->prepare( "$column $lt %s", $this->build_mysql_datetime( $query['before'], $inclusive ) );
// 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";
else 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";
else 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 an array of 'join' and 'where' for compatibility
* with other query classes.
*/
return array(
'where' => $where_parts,
'join' => array(),
);
}
/**
* 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':
$value = (array) $value;
// Remove non-numeric values.
$value = array_filter( $value, 'is_numeric' );
if ( empty( $value ) ) {
return false;
}
return '(' . implode( ',', array_map( 'intval', $value ) ) . ')';
case 'BETWEEN':
case 'NOT BETWEEN':
if ( ! is_array( $value ) || 2 != count( $value ) ) {
$value = array( $value, $value );
} else {
$value = array_values( $value );
}
// If either value is non-numeric, bail.
foreach ( $value as $v ) {
if ( ! is_numeric( $v ) ) {
return false;
}
}
$value = array_map( 'intval', $value );
return $value[0] . ' AND ' . $value[1];
default;
if ( ! is_numeric( $value ) ) {
return false;
}
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 );
}
}