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need help with php db function

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  #1  
Old December 8th, 2003, 07:47 PM
an-ath an-ath is offline
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need help with php db function
hi all,

i'm an asp developer, but as a favor to friends i'm developing a content management sytem for their bookstore in php. i'm a newbie to this programming language so i hope someone will help me. basically i have a functions in asp which performs a sql inserts and updates regardless of which form submitted the information. i'm hoping i could get some direction on how to convert these functions to php. i stumbling on the $http_post_vars which i know is the rough equivalent to asp's request.form. however, i can't find any documentation on the equivalent of the full request.form collection, ie request.form.count, request.form.key, request.form.item. i've posted the asp update function below, any advice would be greatly appreciated.


Code:
function sqlUpdate(table_name,column_name,condition)
	sqlUpdate = "UPDATE " & table_name & " SET "
	for x = 1 to request.form.count
		fieldname = request.form.key(x)
		sqlUpdate = sqlUpdate & fieldname & " = "
		fieldvalue = request.form.item(x)
		fieldvalue = "'" & replace(replace(replace(replace(replace(replace _
			(fieldvalue,"!","!"),"%","%"), _
			";",";"),"<","<"),">",">" ),"'","'") & "'" & ", "			
		sqlUpdate = sqlUpdate & fieldvalue
	next
	
	sqlUpdate = StrReverse(sqlUpdate)
	sqlUpdate = StrReverse(Replace(sqlUpdate, ",", " ",1,1))
		
	sqlUpdate = sqlUpdate & " WHERE " & column_name & " = " & condition & ""
end function
sTablename = "entries"
sColumnname = "entry_id"
sCondition = id
	
sqlEdit = sqlUpdate(sTablename, sColumnname, sCondition)
set rsEdit = cnnDataConn.execute(sqlEdit)



thanx
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  #2  
Old December 9th, 2003, 11:15 AM
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dhouston dhouston is offline
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Try something like the following:

PHP Code:
while(list($key,$val)=each($_POST)){
    //do junk to the keys and vals.
} 


The list($k,$v)=each($array) bit iterates through the array and sets $k and $v to the key and the value for each iteration. It should be pretty easy to find equivalent logic in PHP to do the rest of what you're doing.
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  #3  
Old December 9th, 2003, 05:32 PM
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There's also my favourite:

PHP Code:
foreach ($_POST as $key => $value)
{
    //do junk to the keys and vals.
} 


PHP Manual Reference:
http://www.php.net/foreach
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  #4  
Old December 9th, 2003, 08:18 PM
laidbak laidbak is offline
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an-ath, please post back whether the solutions worked, did not work, or if you need more clarification.

Thanks,
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  #5  
Old December 9th, 2003, 10:15 PM
an-ath an-ath is offline
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hi again,

sorry i didn't post back sooner. the solutions posted do work, and I thank everyone for their assistance. i was just a little embarassed to post back because i'm getting a sql error. here is the code i constructed for test purposes:


PHP Code:
 $id = $_GET["id"];
$sqlInput = "UPDATE cds SET ";
foreach ($_POST as $key => $value){
    $sqlInput .= $key . " = '" . $value . "', ";
}
$sqlInput .= " WHERE id = '" . $id ."'";

if (!($connection = @ mysql_connect($hostname, $username, $password)))
    showerror();
if (!mysql_select_db($databasename, $connection))
    showerror();

echo $sqlInput . "<br />";
if (!(@ mysql_query ($sqlInput, $connection)))
    showerror();
mysql_close($connection) 



and here is the output:


Code:
UPDATE cds SET title = 'Kind of Blue', artist = 'Miles Davis Quintet', year = '1956', WHERE id = '8'

Error 1064 : You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server 
version for the right syntax to use near 'WHERE id = '8'' at line 1



after doing a google search, i've run the query with and without $id single quoted, with and without the single quotes escaped. the same error persists. can't believe i'm this close and i can't make it work.
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  #6  
Old December 9th, 2003, 10:32 PM
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the problem relates to how you're concatonating the comma onto the different fields...

if you notice in your SQL string, there's a comma before the WHERE clause...

One of the ways I've dealt with this in the past is by switching thigns around a bit...

PHP Code:
 $ctr = 0;
$sqlInput = "UPDATE cds SET "; 
foreach ($_POST as $key => $value){ 
    if($ctr != 0) {
        $sqlInput .= ", "; 
    }
    $ctr++;
    $sqlInput .= $key . " = '" . $value . "'"; 
} 
$sqlInput .= " WHERE id = '" . $id ."'"; 


I haven't tested this code exactly (just typing it out on the fly), but I believe it should work.
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  #7  
Old December 10th, 2003, 08:31 AM
an-ath an-ath is offline
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doh, the comma! you just can't put a value on another pair of eyes looking at the code.
your solution works great. thanks again for your help, for everyone's help.
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