PHP MySQL not updating fields with values containing decimals - php

Question

When I try to update a table with the following query string using PHP:
UPDATE card_designs SET `card_price` = '6180',
`annual` = '257.3',
`initial_payment` = '6512.3'
WHERE card_id = '1'
It does not update correctly. card_price value is put in correctly. However annual comes in as 0 and initial_payment comes in as 6255.00.
It doesn't matter if the fields are a VARCHAR, DECIMAL, or DOUBLE. If the value has a decimal it's all messed up.
Also, if I run the above query in a SQL client, the query works fine.
Here is the PHP code that constructs the query. I'm using mysqli:
$sql = "UPDATE ". $table ." SET ";
$updates = array();
foreach ($variables as $field => $value) {
array_push($updates, "`$field` = '$value'");
}
$sql .= implode(', ', $updates);
//Add the $where clauses as needed
if (!empty($where)) {
foreach ($where as $field => $value) {
$value = $value;
$clause[] = "$field = '$value'";
}
$sql .= ' WHERE '. implode(' AND ', $clause);
}
if (!empty( $limit)) {
$sql .= ' LIMIT '. $limit;
}
$query = $this->mysqli->query($sql);

Answer 1

I assume your database table fields datatype is Decimal(9,2)
// Prepare query
$table = "card_designs";
$variables = array(
"card_price" => "6180.00",
"annual" => "257.3",
"initial_payment" => "6512.3"
);
$where = array(
"id" => "1"
);
$sql = "UPDATE ". $table ." SET ";
$updates = array();
foreach ($variables as $field => $value)
{
array_push($updates, "$field = $value");
}
$sql .= implode(', ', $updates);
//Add the $where clauses as needed
if (!empty($where))
{
foreach ($where as $field => $value)
{
$value = $value;
$clause[] = "$field = $value";
}
$sql .= ' WHERE '. implode(' AND ', $clause);
}
if (!empty( $limit))
{
$sql .= ' LIMIT '. $limit;
}
// Run query
if ($mysqli->query($sql))
{
echo "Record updated successfully";
}