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Description

Update a row in the table

wpdb::update( 'table', array( 'column' => 'foo', 'field' => 'bar' ), array( 'ID' => 1 ) )

• wpdb::update( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( 'ID' => 1 ), array( '%s', '%d' ), array( '%d' ) )

Usage

$int|false = wpdb::update( $table, $data, $where, $format, $where_format );

Parameters

$table

( string ) required – Table name

$data

( array ) required – 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.

$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.

$format

( array|string ) optional – Optional. 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.

$where_format

( array|string ) optional – Optional. 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.

Returns

int|false The number of rows updated, or false on error.

Source

File name: wordpress/wp-includes/wp-db.php

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

    $data = $this->wpdb::process_fields( $table, $data, $format );
    if ( false === $data ) {
      return false;
    }
    $where = $this->wpdb::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->wpdb::query( $this->wpdb::prepare( $sql, $values ) );
  }
 

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