PHP MySQL PDO Update not working - php

Question

This is driving me absolutely crazy, I've rewritten it several times and still no go. My insert function works perfectly fine. I have no idea what I'm overlooking, anything you could suggest that might help would be extremely appreciated.
function update($table, $data, $idName='id')
{
if(empty($data) || !is_array($data))
return false;
$columns = $values = array();
foreach($data as $key => $val)
$columns[] = "$key=:$key";
$columns = makeCSL($columns, false);
try {
$qStr = "UPDATE $table SET $columns WHERE $idName=:id";
echo $qStr;
$query = $this->dbHandle->prepare($qStr);
foreach($data as $key => $val)
$query->bindParam("':$key'", $val, PDO::PARAM_STR);
$query->execute();
} catch(PDOException $e) {
$this->errCode = $e->getCode();
$this->errInfo = $e->errorInfo[2];
}
}

Answer 1

You have several problems.
First, you shouldn't put quotes around the placeholder being bound. Second, you need to use bindValue, because bindParam binds to a reference, so everything will be bound to the value of $val from the last time through the loop. And third, you don't have a binding for :id.
So it should be:
foreach($data as $key => $val) {
if ($key != 'id') {
$columns[] = "$key=:$key";
}
}
...
foreach ($data as $key => $val) {
$query->bindValue(":$key", $val, PDO::PARAM_STR);
}

Answer 2

Got it working with the following code
function update($table, $data, $idName="id")
{
if(empty($data) || !is_array($data))
return false;
$columns = array();
foreach($data as $key => $val)
$columns[] = "$key=:$key";
$columns = makeCSL($columns, false);
try {
$query = $this->dbHandle->prepare("UPDATE $table SET $columns WHERE $idName=:id");
$query->execute($data);
} catch(PDOException $e) {
$this->errCode = $e->getCode();
$this->errInfo = $e->errorInfo[2];
}
}