wpdb::prepare() │ public │ WP 2.3.0

$sql = "SELECT * FROM table WHERE id = '$var'";

SELECT * FROM table WHERE id = '2' AND id = (DROP TABLE table2)

$sql = $wpdb->prepare( "SELECT * FROM table WHERE id = %s", $var );

$name   = esc_sql( $name );
$status = esc_sql( $status );

$wpdb->get_var( "SELECT something FROM table WHERE foo = '$name' and status = '$status'" );

global $wpdb;
$wpdb->prepare( $query, ...$args );

$wpdb->prepare(
	"SELECT * FROM `table` WHERE `column` = %s AND `field` = %d OR `other_field` LIKE %s",
	[ 'foo', 1337, '%bar' ]
);

$wpdb->prepare(
	"SELECT DATE_FORMAT(`field`, '%%c') FROM `table` WHERE `column` = %s", 'foo'
);

$metakey   = "'крах' БД";
$metavalue = "WordPress может 'сломать' Базу Данных если не экранировать запрос.";

$wpdb->query(
	$wpdb->prepare(
		"INSERT INTO $wpdb->postmeta ( post_id, meta_key, meta_value ) VALUES ( %d, %s, %s )",
		10,
		$metakey,
		$metavalue
  )
);

$metakey = "'крах' БД";
$metavalue = "WordPress может 'сломать' Базу Данных если не экранировать запрос.";

$wpdb->query(
	$wpdb->prepare(
		"INSERT INTO $wpdb->postmeta ( post_id, meta_key, meta_value ) VALUES ( %d, %s, %s )",
		array(
			10,
			$metakey,
			$metavalue
		)
  )
);

$in_values = [ 'one', 'two' ];

$in_pholders = implode( ',', array_fill( 0, count( $in_values ), '%s' ) );

$sql = $wpdb->prepare( 
	"SELECT $wpdb->posts WHERE post_type = %s WHERE post_name IN ( $in_pholders )",
	[ 'page', ...$in_values ]
);

echo $sql; 

// SELECT wp_posts WHERE post_type = 'page' WHERE post_name IN ( 'one','two' )

Список изменений

Код wpdb::prepare() wpdb::prepare ^{WP 6.1.1}

public function prepare( $query, ...$args ) {
	if ( is_null( $query ) ) {
		return;
	}

	// This is not meant to be foolproof -- but it will catch obviously incorrect usage.
	if ( strpos( $query, '%' ) === false ) {
		wp_load_translations_early();
		_doing_it_wrong(
			'wpdb::prepare',
			sprintf(
				/* translators: %s: wpdb::prepare() */
				__( 'The query argument of %s must have a placeholder.' ),
				'wpdb::prepare()'
			),
			'3.9.0'
		);
	}

	// If args were passed as an array (as in vsprintf), move them up.
	$passed_as_array = false;
	if ( isset( $args[0] ) && is_array( $args[0] ) && 1 === count( $args ) ) {
		$passed_as_array = true;
		$args            = $args[0];
	}

	foreach ( $args as $arg ) {
		if ( ! is_scalar( $arg ) && ! is_null( $arg ) ) {
			wp_load_translations_early();
			_doing_it_wrong(
				'wpdb::prepare',
				sprintf(
					/* translators: %s: Value type. */
					__( 'Unsupported value type (%s).' ),
					gettype( $arg )
				),
				'4.8.2'
			);
		}
	}

	/*
	 * Specify the formatting allowed in a placeholder. The following are allowed:
	 *
	 * - Sign specifier, e.g. $+d
	 * - Numbered placeholders, e.g. %1$s
	 * - Padding specifier, including custom padding characters, e.g. %05s, %'#5s
	 * - Alignment specifier, e.g. %05-s
	 * - Precision specifier, e.g. %.2f
	 */
	$allowed_format = '(?:[1-9][0-9]*[$])?[-+0-9]*(?: |0|\'.)?[-+0-9]*(?:\.[0-9]+)?';

	/*
	 * If a %s placeholder already has quotes around it, removing the existing quotes
	 * and re-inserting them ensures the quotes are consistent.
	 *
	 * For backward compatibility, this is only applied to %s, and not to placeholders like %1$s,
	 * which are frequently used in the middle of longer strings, or as table name placeholders.
	 */
	$query = str_replace( "'%s'", '%s', $query ); // Strip any existing single quotes.
	$query = str_replace( '"%s"', '%s', $query ); // Strip any existing double quotes.
	$query = preg_replace( '/(?<!%)%s/', "'%s'", $query ); // Quote the strings, avoiding escaped strings like %%s.

	$query = preg_replace( "/(?<!%)(%($allowed_format)?f)/", '%\\2F', $query ); // Force floats to be locale-unaware.

	$query = preg_replace( "/%(?:%|$|(?!($allowed_format)?[sdF]))/", '%%\\1', $query ); // Escape any unescaped percents.

	// Count the number of valid placeholders in the query.
	$placeholders = preg_match_all( "/(^|[^%]|(%%)+)%($allowed_format)?[sdF]/", $query, $matches );

	$args_count = count( $args );

	if ( $args_count !== $placeholders ) {
		if ( 1 === $placeholders && $passed_as_array ) {
			// If the passed query only expected one argument, but the wrong number of arguments were sent as an array, bail.
			wp_load_translations_early();
			_doing_it_wrong(
				'wpdb::prepare',
				__( 'The query only expected one placeholder, but an array of multiple placeholders was sent.' ),
				'4.9.0'
			);

			return;
		} else {
			/*
			 * If we don't have the right number of placeholders,
			 * but they were passed as individual arguments,
			 * or we were expecting multiple arguments in an array, throw a warning.
			 */
			wp_load_translations_early();
			_doing_it_wrong(
				'wpdb::prepare',
				sprintf(
					/* translators: 1: Number of placeholders, 2: Number of arguments passed. */
					__( 'The query does not contain the correct number of placeholders (%1$d) for the number of arguments passed (%2$d).' ),
					$placeholders,
					$args_count
				),
				'4.8.3'
			);

			/*
			 * If we don't have enough arguments to match the placeholders,
			 * return an empty string to avoid a fatal error on PHP 8.
			 */
			if ( $args_count < $placeholders ) {
				$max_numbered_placeholder = ! empty( $matches[3] ) ? max( array_map( 'intval', $matches[3] ) ) : 0;

				if ( ! $max_numbered_placeholder || $args_count < $max_numbered_placeholder ) {
					return '';
				}
			}
		}
	}

	array_walk( $args, array( $this, 'escape_by_ref' ) );
	$query = vsprintf( $query, $args );

	return $this->add_placeholder_escape( $query );
}

Cвязанные функции

wpdb