Preciso desenvolver um código onde o total de linha de um SELECT seja armazenado em uma variável. Escrevi o código abaixo, mas quando utilizo o WHERE retorna um erro “Notice: Trying to get property of non-object in”.
É possível fazer um SELECT utilizando um WHERE e salvar o total de registros localizados em uma váriável com o formato “0000”?
include "conecta_mysql.inc"; $ escritorio = $ _POST["n_escritorio"]; $ resultado = $ mysqli->query("SELECT * FROM registros WHERE escritorio=$ escritorio"); $ linhas = $ resultado->num_rows; $ mysqli->close();
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