oci_new_descriptor

(PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)

oci_new_descriptor初始化新的空 LOB 或 FILE 描述符

说明

oci_new_descriptor(resource $connection, int $type = OCI_DTYPE_LOB): ?OCILob

分配保存描述符或 LOB 定位器的资源。

参数

connection

Oracle 连接标识符,由 oci_connect()oci_pconnect() 返回。

type

type 的有效值是:OCI_DTYPE_FILEOCI_DTYPE_LOBOCI_DTYPE_ROWID

返回值

成功时返回新 LOB 或 FILE 描述符,失败时为 null

示例

示例 #1 oci_new_descriptor() 示例

<?php
/* This script is designed to be called from a HTML form.
* It expects $user, $password, $table, $where, and $commitsize
* to be passed in from the form. The script then deletes
* the selected rows using the ROWID and commits after each
* set of $commitsize rows. (Use with care, there is no rollback)
*/
$conn = oci_connect($user, $password);
$stmt = oci_parse($conn, "select rowid from $table $where");
$rowid = oci_new_descriptor($conn, OCI_D_ROWID);
oci_define_by_name($stmt, "ROWID", $rowid);
oci_execute($stmt);
while (
oci_fetch($stmt)) {
$nrows = oci_num_rows($stmt);
$delete = oci_parse($conn, "delete from $table where ROWID = :rid");
oci_bind_by_name($delete, ":rid", $rowid, -1, OCI_B_ROWID);
oci_execute($delete);
echo
"$nrows\n";
if ((
$nrows % $commitsize) == 0) {
oci_commit($conn);
}
}
$nrows = oci_num_rows($stmt);
echo
"$nrows deleted...\n";
oci_free_statement($stmt);
oci_close($conn);
?>
<?php
/* This script demonstrates file upload to LOB columns
* The formfield used for this example looks like this
* <form action="upload.php" method="post" enctype="multipart/form-data">
* <input type="file" name="lob_upload" />
* ...
*/
if (!isset($lob_upload) || $lob_upload == 'none'){
?>
<form action="upload.php" method="post" enctype="multipart/form-data">
Upload file: <input type="file" name="lob_upload" /><br />
<input type="submit" value="Upload" /> - <input type="reset" value="Reset" />
</form>
<?php
} else {

// $lob_upload contains the temporary filename of the uploaded file

// see also the features section on file upload,
// if you would like to use secure uploads

$conn = oci_connect($user, $password);
$lob = oci_new_descriptor($conn, OCI_D_LOB);
$stmt = oci_parse($conn, "insert into $table (id, the_blob)
values(my_seq.NEXTVAL, EMPTY_BLOB()) returning the_blob into :the_blob"
);
oci_bind_by_name($stmt, ':the_blob', $lob, -1, OCI_B_BLOB);
oci_execute($stmt, OCI_DEFAULT);
if (
$lob->savefile($lob_upload)){
oci_commit($conn);
echo
"Blob successfully uploaded\n";
}else{
echo
"Couldn't upload Blob\n";
}
$lob->free();
oci_free_statement($stmt);
oci_close($conn);
}
?>

示例 #2 oci_new_descriptor() 示例

<?php
/* Calling PL/SQL stored procedures which contain clobs as input
* parameters.
* Example PL/SQL stored procedure signature is:
*
* PROCEDURE save_data
* Argument Name Type In/Out Default?
* ------------------------------ ----------------------- ------ --------
* KEY NUMBER(38) IN
* DATA CLOB IN
*
*/

$conn = oci_connect($user, $password);
$stmt = oci_parse($conn, "begin save_data(:key, :data); end;");
$clob = oci_new_descriptor($conn, OCI_D_LOB);
oci_bind_by_name($stmt, ':key', $key);
oci_bind_by_name($stmt, ':data', $clob, -1, OCI_B_CLOB);
$clob->write($data);
oci_execute($stmt, OCI_DEFAULT);
oci_commit($conn);
$clob->free();
oci_free_statement($stmt);
?>

参见