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mysqli_result::$field_count

mysqli_num_fields

(PHP 5)

mysqli_result::$field_count -- mysqli_num_fieldsGet the number of fields in a result

Descrição

Estilo orientado à objeto

Estilo procedural

int mysqli_num_fields ( mysqli_result $result )

Returns the number of fields from specified result set.

Parâmetros

result

Procedural style only: A result set identifier returned by mysqli_query(), mysqli_store_result() or mysqli_use_result().

Valor Retornado

The number of fields from a result set.

Exemplos

Exemplo #1 Estilo orientado à objeto

<?php
$mysqli 
= new mysqli("localhost""my_user""my_password""world");

/* check connection */
if (mysqli_connect_errno()) {
    
printf("Connect failed: %s\n"mysqli_connect_error());
    exit();
}

if (
$result $mysqli->query("SELECT * FROM City ORDER BY ID LIMIT 1")) {

    
/* determine number of fields in result set */
    
$field_cnt $result->field_count;

    
printf("Result set has %d fields.\n"$field_cnt);

    
/* close result set */
    
$result->close();
}

/* close connection */
$mysqli->close();
?>

Exemplo #2 Estilo procedural

<?php
$link 
mysqli_connect("localhost""my_user""my_password""world");

/* check connection */
if (mysqli_connect_errno()) {
    
printf("Connect failed: %s\n"mysqli_connect_error());
    exit();
}

if (
$result mysqli_query($link"SELECT * FROM City ORDER BY ID LIMIT 1")) {

    
/* determine number of fields in result set */
    
$field_cnt mysqli_num_fields($result);

    
printf("Result set has %d fields.\n"$field_cnt);

    
/* close result set */
    
mysqli_free_result($result);
}

/* close connection */
mysqli_close($link);
?>

Os exemplos acima irão imprimir:

Result set has 5 fields.

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