Isn't the expected result supposed to be:

'\\ \\\\ \\\\\\' 

What does var_dump($var); output before and after doing pg_escape_string() ?

$var outputs \ \\ \\\ before and after it, and $test doesn't get an extra \ in most of my tests.

Please paste the exact output of this script:

<?php
$var = '\ \\ \\\';
var_dump($var);
$test = pg_escape_string($var);
var_dump($test);
?>

Parse error: syntax error, unexpected $end in ***\Apache2\htdocs\test.php on line 6

So my example has been wrong, sorry. Tried it with '\ \\ \\\\' and got the following:

string(6) '\ \ \\' string(10) '\\ \\ \\\\'

So it does well, but ...

to better describe my problem: mysql_real_escape_string does it another way, because it handles POST-data correct for database-storage. pg_escape_string and mysqli_real_escape_string are cutting some \ and i don't get the data stored like the input cames from POST. do you understand it now or need a larger example?

Have you read this manual page very carefully:

http://www.php.net/mysql_real_escape_string

Especially the part about magic_quotes..(the example too)

yes, here is my mysql testing code:

<?php
function sql_escape($var) {
  
  if(!isset($mq_gpc)) { 
    $mq_gpc = ini_get('magic_quotes_gpc');
    static $mq_gpc;
  }
  if(!empty($mq_gpc)) {
    stripslashes($var);
  }
  return <>($var);
}
?>

<> = mysql(i)_real_escape_string or pg_escape_string

mysql works, mysqli and pg not, but i found a typo in a function that uses this one. i will go on testing ...

The bug can be closed, my mistake. variable must be first set to static an then defined. that caused the error. nevertheless thanks for help.

done

No bug -> bogus.