mysqli_field_count

Descripci贸n

Estilo por procedimientos:

Estilo orientado a objetos (m茅todo):

Regresa el n煤mero de columnas para la m谩s reciente consulta en la conexi贸n representada por el par谩metro identificador_de_enlace. Esta funci贸n puede ser usada cuando se use la funci贸n Returns the number of columns for the most recent query on the connection represented by the link parameter. This function can be useful when using the mysqli_store_result() function to determine if the query should have produced a non-empty result set or not without knowing the nature of the query.

Valores retornados

An integer representing the number of fields in a result set

Ejemplos

Ejemplo 1. Object oriented style <?php $mysqli = new mysqli("localhost", "my_user", "my_password", "test"); $mysqli->query( "DROP TABLE IF EXISTS friends"); $mysqli->query( "CREATE TABLE friends (id int, name varchar(20))"); $mysqli->query( "INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')"); $mysqli->real_query($HTTP_POST_VARS['query']); if (mysqli_field_count($link)) {     /* this was a select/show or describe query */     $result = $mysqli->store_result();          /* process resultset */     $row = $result->fetch_row();     /* free resultset */     $result->close(); } /* close connection */ $mysqli->close(); ?>

Ejemplo 2. Procedural style <?php $link = mysqli_connect("localhost", "my_user", "my_password", "test"); mysqli_query($link, "DROP TABLE IF EXISTS friends"); mysqli_query($link, "CREATE TABLE friends (id int, name varchar(20))"); mysqli_query($link, "INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')"); mysqli_real_query($link, $HTTP_POST_VARS['query']); if (mysqli_field_count($link)) {     /* this was a select/show or describe query */     $result = mysqli_store_result($link);          /* process resultset */     $row = mysqli_fetch_row($result);     /* free resultset */     mysqli_free_result($result); } /* close connection */ mysqli_close($link); ?>