MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
mysqli_result::$field_count
mysqli_num_fields
Get the number of fields in a result
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.
result
Procedural style only: A result set identifier returned
by
mysqli_query,
mysqli_store_result
or
mysqli_use_result.
The number of fields from a result set.
Example 3.124 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 3.125 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.
mysqli_fetch_field
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