cant insert data into postgresDB in php - php

Question

im having trouble inserting my data's from textbox into postgresdb.
my insert into tbl_ingredients is working fine but my insert into tbl_item is having a troubles can't figure it out how and where?
Connect();
$sql="INSERT INTO tbl_item VALUES('$itemname', '$highthreshold', '$lowthreshold', '$Qpunit', '$description', '$date');";
$iteminfo = pg_query($sql);
$sql1="SELECT MAX(itemid) as newid FROM tbl_item;";
$iden_new = pg_query($sql1);
$fetched_row = pg_fetch_row($iden_new,NULL,PGSQL_BOTH);
$newid=$fetched_row['newid'];
$sql2="INSERT INTO tbl_ingredient VALUES('$newid', '$Brandname');";
$ingredients = pg_query($sql2);
CloseDB();
if(!$sql)
{
$sucmsg = "Successfully added new Item, ".ucfirst($itemname)."!";
echo $sucmsg;
}
else
{
echo "error in saving data";
}
table structure:
tbl_item
itemid>itemname>highquantitythreshold>lowquantitythreshold>qntyperunit>Itemtype>description>dateadded
tbl_ingredient
itemid>brandname
im getting wamp "Warning: pg_query(): Query failed: ERROR: invalid input syntax for integer: "Strawberry" LINE 1: INSERT INTO tbl_item VALUES('Strawberry', '6', '3', '1300gra... ^ in D:\Wamp\wamp\www\Php\CTea\AddItem.php on line 247"
can someone lend me a helping hand thanks!.

Answer 1

You either need to use NULL ->
$sql="INSERT INTO tbl_item VALUES(NULL, '$itemname', '$highthreshold', '$lowthreshold', '$Qpunit', '$description', '$date');";
OR
You need to specify the columns you are inserting into ->
$sql="INSERT INTO tbl_item (itemname, highquantitythreshold, lowquantitythreshold, qntyperunit, description, dateadded) VALUES('$itemname', '$highthreshold', '$lowthreshold', '$Qpunit', '$description', '$date');";
Without the NULL or column name, the database does not know that you are skipping the first column - itemid - so it will try to insert the 1st value into that column.
from the manual - http://www.postgresql.org/docs/9.1/static/sql-insert.html
The target column names can be listed in any order. If no list of
column names is given at all, the default is all the columns of the
table in their declared order; or the first N column names, if there
are only N columns supplied by the VALUES clause or query. The values
supplied by the VALUES clause or query are associated with the
explicit or implicit column list left-to-right.
Each column not present in the explicit or implicit column list will
be filled with a default value, either its declared default value or
null if there is none.