WordPress at a glance
function is not described

wpdb::strip_invalid_text_for_column() public WP 4.2.0

Strips any invalid characters from the string for a given table and column.

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

No Hooks.

Return

String/WP_Error. The converted string, or a WP_Error object if the conversion fails.

Usage

$wpdb = new wpdb();
$wpdb->strip_invalid_text_for_column( $table, $column, $value );
$table(string) (required)
Table name.
$column(string) (required)
Column name.
$value(string) (required)
The text to check.

Changelog

Since 4.2.0 Introduced.

Code of wpdb::strip_invalid_text_for_column() WP 5.5.1

<?php
public function strip_invalid_text_for_column( $table, $column, $value ) {
	if ( ! is_string( $value ) ) {
		return $value;
	}

	$charset = $this->get_col_charset( $table, $column );
	if ( ! $charset ) {
		// Not a string column.
		return $value;
	} elseif ( is_wp_error( $charset ) ) {
		// Bail on real errors.
		return $charset;
	}

	$data = array(
		$column => array(
			'value'   => $value,
			'charset' => $charset,
			'length'  => $this->get_col_length( $table, $column ),
		),
	);

	$data = $this->strip_invalid_text( $data );
	if ( is_wp_error( $data ) ) {
		return $data;
	}

	return $data[ $column ]['value'];
}