' . esc_html( $_value ) . '',
'' . esc_html( $key ) . '',
'' . esc_html( $check['min'] ) . '',
'' . esc_html( $check['max'] ) . ''
);
_doing_it_wrong( __CLASS__, $error, '4.1.0' );
$valid = false;
}
}
}
// If we already have invalid date messages, don't bother running through checkdate().
if ( ! $valid ) {
return $valid;
}
$day_month_year_error_msg = '';
$day_exists = array_key_exists( 'day', $date_query ) && is_numeric( $date_query['day'] );
$month_exists = array_key_exists( 'month', $date_query ) && is_numeric( $date_query['month'] );
$year_exists = array_key_exists( 'year', $date_query ) && is_numeric( $date_query['year'] );
if ( $day_exists && $month_exists && $year_exists ) {
// 1. Checking day, month, year combination.
if ( ! wp_checkdate( $date_query['month'], $date_query['day'], $date_query['year'], sprintf( '%s-%s-%s', $date_query['year'], $date_query['month'], $date_query['day'] ) ) ) {
/* translators: 1: year, 2: month, 3: day of month */
$day_month_year_error_msg = sprintf(
__( 'The following values do not describe a valid date: year %1$s, month %2$s, day %3$s.' ),
'' . esc_html( $date_query['year'] ) . '',
'' . esc_html( $date_query['month'] ) . '',
'' . esc_html( $date_query['day'] ) . ''
);
$valid = false;
}
} elseif ( $day_exists && $month_exists ) {
/*
* 2. checking day, month combination
* We use 2012 because, as a leap year, it's the most permissive.
*/
if ( ! wp_checkdate( $date_query['month'], $date_query['day'], 2012, sprintf( '2012-%s-%s', $date_query['month'], $date_query['day'] ) ) ) {
/* translators: 1: month, 2: day of month */
$day_month_year_error_msg = sprintf(
__( 'The following values do not describe a valid date: month %1$s, day %2$s.' ),
'' . esc_html( $date_query['month'] ) . '',
'' . esc_html( $date_query['day'] ) . ''
);
$valid = false;
}
}
if ( ! empty( $day_month_year_error_msg ) ) {
_doing_it_wrong( __CLASS__, $day_month_year_error_msg, '4.1.0' );
}
return $valid;
}
/**
* Validates a column name parameter.
*
* Column names without a table prefix (like 'post_date') are checked against a whitelist of
* known tables, and then, if found, have a table prefix (such as 'wp_posts.') prepended.
* Prefixed column names (such as 'wp_posts.post_date') bypass this whitelist check,
* and are only sanitized to remove illegal characters.
*
* @since 3.7.0
*
* @param string $column The user-supplied column name.
* @return string A validated column name value.
*/
public function validate_column( $column ) {
global $wpdb;
$valid_columns = array(
'post_date', 'post_date_gmt', 'post_modified',
'post_modified_gmt', 'comment_date', 'comment_date_gmt',
'user_registered', 'registered', 'last_updated',
);
// Attempt to detect a table prefix.
if ( false === strpos( $column, '.' ) ) {
/**
* Filters the list of valid date query columns.
*
* @since 3.7.0
* @since 4.1.0 Added 'user_registered' to the default recognized columns.
*
* @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',
* 'user_registered'
*/
if ( ! in_array( $column, apply_filters( 'date_query_valid_columns', $valid_columns ) ) ) {
$column = 'post_date';
}
$known_columns = array(
$wpdb->posts => array(
'post_date',
'post_date_gmt',
'post_modified',
'post_modified_gmt',
),
$wpdb->comments => array(
'comment_date',
'comment_date_gmt',
),
$wpdb->users => array(
'user_registered',
),
$wpdb->blogs => array(
'registered',
'last_updated',
),
);
// If it's a known column name, add the appropriate table prefix.
foreach ( $known_columns as $table_name => $table_columns ) {
if ( in_array( $column, $table_columns ) ) {
$column = $table_name . '.' . $column;
break;
}
}
}
// Remove unsafe characters.
return preg_replace( '/[^a-zA-Z0-9_$\.]/', '', $column );
}
/**
* Generate WHERE clause to be appended to a main query.
*
* @since 3.7.0
*
* @return string MySQL WHERE clause.
*/
public function get_sql() {
$sql = $this->get_sql_clauses();
$where = $sql['where'];
/**
* Filters 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 WP_Date_Query::get_sql(), this method is abstracted
* out to maintain parity with the other Query classes.
*
* @since 4.1.0
*
* @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
*
* @param array $query Query to parse.
* @param int $depth Optional. Number of tree levels deep we currently are.
* Used to calculate indentation. Default 0.
* @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'];
} elseif ( 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'][] = '';
} elseif ( 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
*
* @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
*
* @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";
} elseif ( 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";
} elseif ( 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['dayofweek_iso'] ) && $value = $this->build_value( $compare, $query['dayofweek_iso'] ) )
$where_parts[] = "WEEKDAY( $column ) + 1 $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
*
* @param string $compare The compare operator to use
* @param string|array $value The value
* @return string|false|int 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 will be run through strtotime().
*
* @since 3.7.0
*
* @param string|array $datetime An array of parameters or a strotime() string
* @param bool $default_to_max Whether to round up incomplete dates. Supported by values
* of $datetime that are arrays, or string values that are a
* subset of MySQL date format ('Y', 'Y-m', 'Y-m-d', 'Y-m-d H:i').
* Default: false.
* @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( $datetime ) ) {
/*
* Try to parse some common date formats, so we can detect
* the level of precision and support the 'inclusive' parameter.
*/
if ( preg_match( '/^(\d{4})$/', $datetime, $matches ) ) {
// Y
$datetime = array(
'year' => intval( $matches[1] ),
);
} elseif ( preg_match( '/^(\d{4})\-(\d{2})$/', $datetime, $matches ) ) {
// Y-m
$datetime = array(
'year' => intval( $matches[1] ),
'month' => intval( $matches[2] ),
);
} elseif ( preg_match( '/^(\d{4})\-(\d{2})\-(\d{2})$/', $datetime, $matches ) ) {
// Y-m-d
$datetime = array(
'year' => intval( $matches[1] ),
'month' => intval( $matches[2] ),
'day' => intval( $matches[3] ),
);
} elseif ( preg_match( '/^(\d{4})\-(\d{2})\-(\d{2}) (\d{2}):(\d{2})$/', $datetime, $matches ) ) {
// Y-m-d H:i
$datetime = array(
'year' => intval( $matches[1] ),
'month' => intval( $matches[2] ),
'day' => intval( $matches[3] ),
'hour' => intval( $matches[4] ),
'minute' => intval( $matches[5] ),
);
}
// If no match is found, we don't support default_to_max.
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
*
* @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 ( null !== $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 );
}
}
爱情，是一种强烈的情感体验，它能使人们表现出最真实的一面。然而，在爱情的领域里，有些人会变得极端，尤其是B型血的人。那么，为什么B型血的人在爱情中会变得极端呢？
B型血的人拥有一种名为“B抗原”的特殊抗原。研究表明，这种抗原可能影响到个体的性格特征和行为。可能的原因是，这种抗原可能影响神经递质的分泌，从而影响到个体的情绪和行为。
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