PHP Manuál
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mysql_num_fields

(PHP 3, PHP 4 , PHP 5)

mysql_num_fields -- Get number of fields in result

Description

int mysql_num_fields ( resource result )

mysql_num_fields() returns the number of fields in the result set result.

Príklad 1. A mysql_num_fields() example

<?php
$result = mysql_query("SELECT id,email FROM people WHERE id = '42'");
if (!$result) {
    echo 'Could not run query: ' . mysql_error();
    exit;
}

/* returns 2 because id,email === two fields */
echo mysql_num_fields($result);
?>

For downward compatibility mysql_numfields() can also be used. This is deprecated however.

See also mysql_select_db(), mysql_query(), mysql_fetch_field() and mysql_num_rows().

PredchádzajúciDomovNasledujúci
mysql_list_tablesHoremysql_num_rows