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8.3.11.11 mysqli_result::$field_count, mysqli_num_fields

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  • mysqli_result::$field_count

    mysqli_num_fields

    Get the number of fields in a result

Description

Object oriented style

int mysqli_result->field_count ;

Procedural style

int mysqli_num_fields(mysqli_result result);

Returns the number of fields from specified result set.

Parameters

result

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

Return Values

The number of fields from a result set.

Examples

Example 8.133 Object oriented style

<?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();
?>

Example 8.134 Procedural style

<?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);
?>

The above examples will output:


Result set has 5 fields.


See Also

mysqli_fetch_field