Description:
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Running php 5.0.4, pdo 0.3, pdo_pgsql 0.2, postgresql 8

I am used to using the user=x syntax in the connect string and was happy to see pdo support it.  However I ran into a few problems when I wanted to include driver options.

It seemed that pdo was adding an extra user= flag, causing postgresql to have a few problems and the connection to fail.

I think an additional (connect string, options array) syntax would be great.  Alternatively just check the string length.

Reproduce code:
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$conn = new PDO("pgsql:dbname=benchmarking user=benchmarking");
$conn = new PDO("pgsql:dbname=benchmarking user=benchmarking", array(PDO_ATTR_PERSISTENT=>true));
$conn = new PDO("pgsql:dbname=benchmarking user=benchmarking",,, array(PDO_ATTR_PERSISTENT=>true));
$conn = new PDO("pgsql:dbname=benchmarking user=benchmarking", "", "", array(PDO_ATTR_PERSISTENT=>true));
$conn = new PDO("pgsql:dbname=benchmarking, "benchmarking", "", array(PDO_ATTR_PERSISTENT=>true));

Expected result:
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I expected/hoped all of the above would give a sucessful connection.

Actual result:
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works
fails - wrong parameters
fails - php error
fails - postgresql error
works