WordPress at a glance
function is not described

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' ) )

{} It's a method of the class: wpdb{}

No Hooks.

Return

Int/false. The number of rows updated, 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

Notes

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

Changelog

Since 3.4.0 Introduced.

Code of wpdb::delete() WP 5.5.1

<?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 ) );
}