wpdb::process_fields( string $table, array $data, string[]|string $format ): array|false

Source

protected function process_fields( $table, $data, $format ) {
	$data = $this->process_field_formats( $data, $format );
	if ( false === $data ) {
		return false;
	}

	$data = $this->process_field_charsets( $data, $table );
	if ( false === $data ) {
		return false;
	}

	$data = $this->process_field_lengths( $data, $table );
	if ( false === $data ) {
		return false;
	}

	$converted_data = $this->strip_invalid_text( $data );

	if ( $data !== $converted_data ) {

		$problem_fields = array();
		foreach ( $data as $field => $value ) {
			if ( $value !== $converted_data[ $field ] ) {
				$problem_fields[] = $field;
			}
		}

		wp_load_translations_early();

		if ( 1 === count( $problem_fields ) ) {
			$this->last_error = sprintf(
				/* translators: %s: Database field where the error occurred. */
				__( 'WordPress database error: Processing the value for the following field failed: %s. The supplied value may be too long or contains invalid data.' ),
				reset( $problem_fields )
			);
		} else {
			$this->last_error = sprintf(
				/* translators: %s: Database fields where the error occurred. */
				__( 'WordPress database error: Processing the values for the following fields failed: %s. The supplied values may be too long or contain invalid data.' ),
				implode( ', ', $problem_fields )
			);
		}

		return false;
	}

	return $data;
}

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