What are some common errors or warnings, such as ORA-01002, that developers may encounter when using OCI functions like OCIFetch in PHP for Oracle databases?

One common error that developers may encounter when using OCI functions like OCIFetch in PHP for Oracle databases is ORA-01002, which indicates that the fetch operation returned no data. This error can occur if the fetch operation is called when there is no more data to fetch. To solve this issue, developers should check the return value of OCIFetch to determine if there is more data to fetch before calling the function again.

// Example code snippet to avoid ORA-01002 error in OCIFetch
while ($row = oci_fetch_array($statement, OCI_ASSOC + OCI_RETURN_NULLS)) {
    // Process fetched data
}