pg_num_fields
(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
pg_num_fields — Returns the number of fields in a result
Description
pg_num_fields(PgSql\Result $result): int
pg_num_fields() returns the number of fields (columns) in the PgSql\Result instance.
Note:
This function used to be called pg_numfields().
Parameters
-
result -
An PgSql\Result instance, returned by pg_query(), pg_query_params() or pg_execute()(among others).
Return Values
The number of fields (columns) in the result. On error, -1 is returned.
Changelog
| Version | Description |
|---|---|
| 8.1.0 | The result parameter expects an PgSql\Result instance now; previously, a resource was expected. |
Examples
Example #1 pg_num_fields() example
<?php $result = pg_query($conn, "SELECT 1, 2"); $num = pg_num_fields($result); echo $num . " field(s) returned.\n"; ?>
The above example will output:
2 field(s) returned.
See Also
- pg_num_rows() - Returns the number of rows in a result
- pg_affected_rows() - Returns number of affected records (tuples)
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https://www.php.net/manual/en/function.pg-num-fields.php
