Updates a row in the table.

Description

Examples:

$wpdb->update(
    'table',
    array(
        'column1' => 'foo',
        'column2' => 'bar',
    ),
    array(
        'ID' => 1,
    )
);
$wpdb->update(
    'table',
    array(
        'column1' => 'foo',
        'column2' => 1337,
    ),
    array(
        'ID' => 1,
    ),
    array(
        '%s',
        '%d',
    ),
    array(
        '%d',
    )
);

See also

• wpdb::prepare()
• wpdb::$field_types
• wp_set_wpdb_vars()

Parameters

$tablestringrequired

Table name.

$dataarrayrequired

Data to update (in column => value pairs).
Both $data columns and $data values should be "raw" (neither should be SQL escaped).
Sending a null value will cause the column to be set to NULL – the corresponding format is ignored in this case.

$wherearrayrequired

A named array of WHERE clauses (in column => value pairs).
Multiple clauses will be joined with ANDs.
Both $where columns and $where values should be "raw".
Sending a null value will create an IS NULL comparison – the corresponding format will be ignored in this case.

$formatstring[]|stringoptional

An array of formats to be mapped to each of the values in $data.
If string, that format will be used for all of the values in $data.
A format is one of '%d', '%f', '%s' (integer, float, string).
If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types.

Default:null

$where_formatstring[]|stringoptional

An array of formats to be mapped to each of the values in $where.
If string, that format will be used for all of the items in $where.
A format is one of '%d', '%f', '%s' (integer, float, string).
If omitted, all values in $where will be treated as strings unless otherwise specified in wpdb::$field_types.

Default:null

Return

Source

public function update( $table, $data, $where, $format = null, $where_format = null ) {
	if ( ! is_array( $data ) || ! is_array( $where ) ) {
		return false;
	}

	$data = $this->process_fields( $table, $data, $format );
	if ( false === $data ) {
		return false;
	}
	$where = $this->process_fields( $table, $where, $where_format );
	if ( false === $where ) {
		return false;
	}

	$fields     = array();
	$conditions = array();
	$values     = array();
	foreach ( $data as $field => $value ) {
		if ( is_null( $value['value'] ) ) {
			$fields[] = "`$field` = NULL";
			continue;
		}

		$fields[] = "`$field` = " . $value['format'];
		$values[] = $value['value'];
	}
	foreach ( $where as $field => $value ) {
		if ( is_null( $value['value'] ) ) {
			$conditions[] = "`$field` IS NULL";
			continue;
		}

		$conditions[] = "`$field` = " . $value['format'];
		$values[]     = $value['value'];
	}

	$fields     = implode( ', ', $fields );
	$conditions = implode( ' AND ', $conditions );

	$sql = "UPDATE `$table` SET $fields WHERE $conditions";

	$this->check_current_query = false;
	return $this->query( $this->prepare( $sql, $values ) );
}

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Changelog