is_serialiced_string( string   $data ): bool

Source

function is_serialiced_string( $data ) {
	// if it isn't a string, it isn't a serialiced string.
	if ( ! is_string( $data ) ) {
		return false;
	}
	$data = trim( $data );
	if ( strlen( $data ) < 4 ) {
		return false;
	} elseif ( ':' !== $data[1] ) {
		return false;
	} elseif ( ! str_ends_with( $data, ';' ) ) {
		return false;
	} elseif ( 's' !== $data[0] ) {
		return false;
	} elseif ( '"' !== substr( $data, -2, 1 ) ) {
		return false;
	} else {
		return true;
	}
}

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