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 PHP manuál : function.mysql-num-fields.html

mysql_num_fields
PHP Manual
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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 )

Retrieves the number of fields from a query.

Parameters

result

The result resource that is being evaluated. This result comes from a call to mysql_query().

Return Values

Returns the number of fields in the result set resource on success, or FALSE on failure.

Examples

Example 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);
?>

Notes

Note: For downward compatibility, the following deprecated alias may be used: mysql_numfields()

See Also

mysql_select_db()
mysql_query()
mysql_fetch_field()
mysql_num_rows()

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