oci_field_is_null
(PHP 5, PECL OCI8 >= 1.1.0)
oci_field_is_null — Checks if a field in the currently fetched row is NULL
Description
Checks if the given field from the current row of
statement is NULL.
Parameters
-
statement -
A valid OCI statement identifier.
-
field -
Can be the field's index (1-based) or name.
Return Values
Returns TRUE if field is NULL, FALSE otherwise.
Examples
Example #1 oci_field_name() example
<?php
// Create the table with:
// CREATE TABLE mytab (c1 NUMBER);
// INSERT INTO mytab VALUES (1);
// INSERT INTO mytab VALUES (NULL);
$conn = oci_connect("hr", "hrpwd", "localhost/XE");
if (!$conn) {
$m = oci_error();
trigger_error(htmlentities($m['message']), E_USER_ERROR);
}
$stid = oci_parse($conn, "SELECT * FROM mytab");
oci_execute($stid);
while (($row = oci_fetch_array($stid, OCI_RETURN_NULLS)) != false) {
$ncols = oci_num_fields($stid);
for ($col = 1; $col <= $ncols; $col++) {
var_dump(oci_field_is_null($stid, $col));
}
}
// Outputs:
// bool(false)
// bool(true)
oci_free_statement($stid);
oci_close($conn);
?>
Notes
Note:
In PHP versions before 5.0.0 you must use ocicolumnisnull() instead. This name still can be used, it was left as alias of oci_field_is_null() for downwards compatability. This, however, is deprecated and not recommended.
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Расширения для работы с базами данных
- Расширения для работы с базами данных отдельных производителей
- Oracle OCI8
- oci_bind_array_by_name
- oci_bind_by_name
- oci_cancel
- oci_client_version
- oci_close
- oci_commit
- oci_connect
- oci_define_by_name
- oci_error
- oci_execute
- oci_fetch_all
- oci_fetch_array
- oci_fetch_assoc
- oci_fetch_object
- oci_fetch_row
- oci_fetch
- oci_field_is_null
- oci_field_name
- oci_field_precision
- oci_field_scale
- oci_field_size
- oci_field_type_raw
- oci_field_type
- oci_free_descriptor
- oci_free_statement
- oci_get_implicit_resultset
- oci_internal_debug
- oci_lob_copy
- oci_lob_is_equal
- oci_new_collection
- oci_new_connect
- oci_new_cursor
- oci_new_descriptor
- oci_num_fields
- oci_num_rows
- oci_parse
- oci_password_change
- oci_pconnect
- oci_result
- oci_rollback
- oci_server_version
- oci_set_action
- oci_set_client_identifier
- oci_set_client_info
- oci_set_edition
- oci_set_module_name
- oci_set_prefetch
- oci_statement_type
Коментарии
<?php
// Connect to Oracle database.
// Username : Raju
// Password : Password
// Database : Database_name
$conn=OCILogon("Raju", "Password", "DATABASE_NAME");
if ( ! $conn ) {
echo "Unable to connect: " . var_dump( OCIError() );
die();
}
// Select Data...
// DESC[RIBE] COMPANY
// CompanyID VARCHAR2(10)
// CompanyName VARCHAR2(30)
// LastUserID VARCHAR2(15)
// LastDate DATE
//
$query = "SELECT * FROM Company";
$result = OCIParse($conn, $query);
OCIExecute($result, OCI_DEFAULT);
while (OCIFetchInto ($result, $row, OCI_ASSOC)) {
// Usage of OCIcolumnisnull()
if (OCIcolumnisnull($result, 'CompanyName')) {
print ( "<P>" . $row['CompanyID'] . "--->" . "Company Name NOT found !! " . "<P>" );
}
else {
print ("<P>" . $row['CompanyID'] . "--->" . $row['CompanyName'] . "<P>" );
}
}
// Close connection from Oracle...
OCILogoff($conn);
?>