(PHP 5, PHP 7)
Get the number of fields in a result
int mysqli_num_fields ( mysqli_result $result )
Object oriented style
Procedural style
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().
Returns:
The number of fields from a result set.
Examples:
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(); ?>
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:
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