(PHP 4 >= 4.2.0, PHP 5)
pg_num_fields — Returns the number of fields in a result
pg_num_fields() returns the number of fields (columns) in a PostgreSQL result resource.
Замечание: This function used to be called pg_numfields().
PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).
The number of fields (columns) in the result. On error, -1 is returned.
Пример #1 pg_num_fields() example
<?php
$result = pg_query($conn, "SELECT 1, 2");
$num = pg_num_fields($result);
echo $num . " field(s) returned.\n";
?>
Результат выполнения данного примера:
2 field(s) returned.