pg_connect在失败时不会返回false

Question

I am trying to connect to postgres database using pg_connect in php. If I provide wrong credentials for testing it does not return false.

Instead its return below error

Description:

pg_connect(): Unable to connect to PostgreSQL server: could not connect to server: Connection refused

Answer 1

Try this may be helpful

<?php
function getdb() {
    $db = pg_connect("...") or die('connection failed');
    return $db;
}
?>

Answer 2

I think the problem here is that you are trying to print the result, but printing a value of false prints nothing, so you are just seeing the warning that pg_connect generates.

print(false); //prints nothing

If you want to see the actual value of a variable, use var_dump() instead:

$result = pg_connect(...);
var_dump($result);

Answer 3

As some one said in comment, you should check here: how to catch pg_connect() function error?

You could hide the error by using @ and do something like this:

<?php
$db = @pg_connect("...") or die("failed");
if( $db == "failed"){
  // false
}
else {
  // true
}
?>