wpdb::delete() │ public │ WP 3.4.0

Deletes a row in the table.

Examples:

wpdb::delete( 'table', array( 'ID' => 1 ) )
wpdb::delete( 'table', array( 'ID' => 1 ), array( '%d' ) )

Method of the class: wpdb{}

Uses: wpdb::query(), wpdb::process_fields()

No Hooks.

Return

Int|false. The number of rows deleted, or false on error.

Usage

global $wpdb;
$wpdb->delete( $table, $where, $where_format );
$table(string) (required)
Table name.
$where(array) (required)
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.
$where_format(array|string)
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 $data will be treated as strings unless otherwise specified in wpdb::$field_types.
Default: null

Examples

0

#1 Example of deleting data from the database 

// Delete row with field ID=1 from table table
$wpdb->delete( 'table', [ 'ID' => 1 ] );

// Let's specify the format of the value $where
$wpdb->delete( 'table', [ 'ID'=>'1' ], [ '%d' ] ); // 1 will be treated as (int) (%d).

Notes

Changelog

Since 3.4.0 Introduced.

wpdb::delete() code WP 6.1.1

wp-includes/class-wpdb.php 
public function delete( $table, $where, $where_format = null ) {
	if ( ! is_array( $where ) ) {
		return false;
	}

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

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

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

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

	$sql = "DELETE FROM `$table` WHERE $conditions";

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

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