(PHP 4 >= 4.2.0, PHP 5, PHP 7)
pg_field_num — Returns the field number of the named field
$field_name) : int
pg_field_num() will return the number of the
field number that corresponds to the
field_name in the given PostgreSQL
This function used to be called pg_fieldnum().
The field number (numbered from 0), or -1 on error.
Example #1 Getting information about fields
$dbconn = pg_connect("dbname=publisher") or die("Could not connect");
$res = pg_query($dbconn, "select author, year, title from authors where author = 'Orwell'");
echo "Column 'title' is field number: ", pg_field_num($res, 'title');
The above example will output:
Column 'title' is field number: 2