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mysqli_result::$field_count

mysqli_num_fields

(PHP 5, PHP 7, PHP 8)

mysqli_result::$field_count -- mysqli_num_fields — Gets the number of fields in the result set

Descrizione

Stile orientato agli oggetti

int $mysqli_result->field_count;

Stile procedurale

mysqli_num_fields(mysqli_result $result): int

Returns the number of fields in the result set.

Elenco dei parametri

result

Solo nello stile procedurale: un identificatore di resultset restituito da mysqli_query(), mysqli_store_result() o mysqli_use_result().

Valori restituiti

An int representing the number of fields.

Esempi

Example #1 Stile orientato agli oggetti

<?php

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

$result = $mysqli->query("SELECT Name, CountryCode, District, Population FROM City ORDER BY ID LIMIT 1");

/* Get the number of fields in the result set */
$field_cnt = $result->field_count;

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

Example #2 Stile procedurale

<?php

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

$result = mysqli_query($link, "SELECT Name, CountryCode, District, Population FROM City ORDER BY ID LIMIT 1");

/* Get the number of fields in the result set */
$field_cnt = mysqli_num_fields($result);

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

I precedenti esempi visualizzeranno:

Result set has 4 fields.

Vedere anche: