Loop though database with foreach - php

Question

I want to browse data from my postgre database with a "foreach". So I made my request like that :
$conn_string = "host=localhost port=5432 dbname=test_postgre user=postgres password='1234'";
$dbconn = pg_connect($conn_string);
$sql = "SELECT id_traitement FROM public.traitement WHERE id_essai='.$id_essai.';";
$res = pg_query($sql) or die("Pb avec la requete: $sql");
$data = pg_fetch_all($res);
And I get my values with "pg_fetch_all".
After that, I'm looking for compare the data in my database (get with the request) and the data in my web page. So I created this loop :
foreach($array as $ligne_web)
{
foreach($data['id_traitement'] as $ligne_base)
{
if(($ligne_web[0] == $ligne_base) and ($flag))
{
//update de la ligne
update_traitement($id_traitement,$traitement,$code_traitement,$id_essai);
$flag2 = false;
break 1;
}
}
if(($flag) and ($flag2))
{
insert_traitement($id_traitement,$traitement,$code_traitement,$id_essai);
}
}
When I try to run it, firebug tells me : Invalid argument supplied for foreach(). So I don't know how to browse the rows in the database. Certainly my problem is in my foreach, but I don't find what's wrong.
Help please !

Answer 1

It seems your second foreach needs to be '$data' instead of $data['id_traitement']
So your code need to changed to ,
foreach($arr as $ligne_web)
{
foreach($data as $ligne_base) // <-- Here is the correction
{
if(($ligne_web[0] == $ligne_base) and ($flag))
{
------ REST of your Codes ------

Answer 2

Ok, I found an answer. Instead of an array $data from my database, and directly after the request, I created a new array.
Here is my code :
$conn_string = "host=localhost port=5432 dbname=test_postgre user=postgres password='1234'";
$dbconn = pg_connect($conn_string);
$sql = "SELECT id_traitement FROM public.traitement WHERE id_essai='.$id_essai.';";
$res = pg_query($sql) or die("Pb avec la requete: $sql");
$tableau_database_final = array();
while ($data = pg_fetch_all($res)) //Here is my array
{
$tableau_database = array('id_traitement'=>$data['id_traitement']);
array_push($tableau_database_final,$tableau_database);
}
$flag2 = true;
foreach($array as $ligne_web)
{
foreach($tableau_database_final as $ligne_base)
{
echo ($ligne_web[0]);
echo ($ligne_base);
if(($ligne_web[0] == $ligne_base)) //Si il existe une ligne ayant déjà le même id traitement
{
//update de la ligne
update_traitement($id_traitement,$traitement,$code_traitement,$id_essai);
$flag2 = false;
break 1;
}
}
if(($flag) && ($flag2))
{
//insert_traitement($id_traitement,$traitement,$code_traitement,$id_essai);
}
}