(PHP 4 >= 4.2.0, PHP 5, PHP 7)
pg_num_fields — Returns the number of fields in a result
pg_num_fields ( resource $result ) : int
pg_num_fields() returns the number of fields (columns) in a PostgreSQL result resource.
Note:
This function used to be called pg_numfields().
result
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.
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.
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https://www.php.net/manual/en/function.pg-num-fields.php