Get detailed field information for a pgsql resultset in php - php

Question

I have been trying to get the complete meta information for the fields in a result set from Postgresql in php (something like mysql_fetch_field(), which gives a lots of info about the field definition). While I am able to use the following functions to find some information:
$name = pg_field_name($result, 1);
$table = pg_field_table($result, 1);
$type = pg_field_type($result, 1);
I could not find a way to get more details about whether the field allow null values, contains blob data (by field definition), is a primary,unique key by definition etc. The mysql_fetch_field() gives all of this information somehow, which is very useful.
I would really like some way to get that information from php directly, but if that is not possible, then maybe someone has created a routine that might be able to extract that info from a pgsql resultset somehow.
PS: This looks promising, but the warning on the page is not a good sign:
http://php.net/manual/en/pdostatement.getcolumnmeta.php
Also, I am not using PDO at the moment, but if there is no solution, then a PDo specific answer will suffice too.

Answer 1

You can find the metadata on you column with a query like this:
select * from information_schema.columns
where table_name = 'regions' and column_name = 'capital'
This should provide all of the information found in mysql_fetch_field. I'm not a php coder, so perhaps someone knows of a function that wraps this query.

Answer 2

All;
Was amazed to find pgsql does not have a column count routine in PHP. The helps I looked up all got total count from "information_schema.columns", which is not what you want when doing cell by cell processing.
So here is a couple of quick functions to use:
// Test Cell by Cell
echo "Testing Cell by Cell! <br>";
$sql = "SELECT * FROM sometable;
$res = pg_query($sql);
$r_cnt = pg_numrows($res) or die("Error: Row Count Failed!");
$c_cnt = pg_numcols($res) or die("Error: Col Count Failed!");
echo "C=> $c_cnt R=> $r_cnt <br>";
for ($n=1; $n<=$r_cnt; $n++) {
for ($x=1; $x<=$c_cnt; $x++) {
echo "Cell=> pg_result($res,$n,$x) <br>";
} // end while $x
} // end while $n
function pg_numcols($res) {
$spos = strpos(strtoupper($this->db_sql),'SELECT')+6;
$fpos = strpos(strtoupper($this->db_sql),'FROM');
$lenp = $fpos - $spos;
$t_str = substr($this->db_sql,$spos,$lenp);
$x_str = explode(',',trim($t_str));
$result = count($x_str);
return $result;
} // end function
Hope you enjoy!