ocinewdescriptor
(PHP 3>= 3.0.7, PHP 4 , PHP 5)
ocinewdescriptor --
初始化一个新的空 LOB 或 FILE 描述符
描述
object
ocinewdescriptor ( resource connection [, int type])
ocinewdescriptor() 分配空间存储描述符或
LOB 定位器。
有效的 type 值是 OCI_D_FILE、
OCI_D_LOB 和 OCI_D_ROWID。
对于 LOB 描述符，方法 load, save, 和 savefile 与描述符相关，而
BFILE 只存在 load 方法。参见第二个例子的使用提示。
例子 1. ocinewdescriptor()
<?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)
*/
$conn = OCILogon($user, $password);
$stmt = OCIParse($conn, "select rowid from $table $where");
$rowid = OCINewDescriptor($conn, OCI_D_ROWID);
OCIDefineByName($stmt, "ROWID", &$rowid);
OCIExecute($stmt);
while (OCIFetch($stmt)) {
$nrows = OCIRowCount($stmt);
$delete = OCIParse($conn, "delete from $table where ROWID = :rid");
OCIBindByName($delete, ":rid", &$rowid, -1, OCI_B_ROWID);
OCIExecute($delete);
echo "$nrows\n";
if (($nrows % $commitsize) == 0) {
OCICommit($conn);
}
}
$nrows = OCIRowCount($stmt);
echo "$nrows deleted...\n";
OCIFreeStatement($stmt);
OCILogoff($conn);
?>
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<?php
/* This script demonstrates file upload to LOB columns
* The formfield used for this example looks like this
* <form action="upload.php" method="post" enctype="multipart/form-data">
* <input type="file" name="lob_upload" />
* ...
*/
if (!isset($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
$conn = OCILogon($user, $password);
$lob = OCINewDescriptor($conn, OCI_D_LOB);
$stmt = OCIParse($conn, "insert into $table (id, the_blob)
values(my_seq.NEXTVAL, EMPTY_BLOB()) returning the_blob into :the_blob");
OCIBindByName($stmt, ':the_blob', &$lob, -1, OCI_B_BLOB);
OCIExecute($stmt, OCI_DEFAULT);
if ($lob->savefile($lob_upload)){
OCICommit($conn);
echo "Blob successfully uploaded\n";
}else{
echo "Couldn't upload Blob\n";
}
OCIFreeDesc($lob);
OCIFreeStatement($stmt);
OCILogoff($conn);
}
?>
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例子 2. ocinewdescriptor()
<?php
/* Calling PL/SQL stored procedures which contain clobs as input
* parameters (PHP 4 >= 4.0.6).
* Example PL/SQL stored procedure signature is:
*
* PROCEDURE save_data
* Argument Name Type In/Out Default?
* ------------------------------ ----------------------- ------ --------
* KEY NUMBER(38) IN
* DATA CLOB IN
*
*/
$conn = OCILogon($user, $password);
$stmt = OCIParse($conn, "begin save_data(:key, :data); end;");
$clob = OCINewDescriptor($conn, OCI_D_LOB);
OCIBindByName($stmt, ':key', $key);
OCIBindByName($stmt, ':data', $clob, -1, OCI_B_CLOB);
$clob->WriteTemporary($data);
OCIExecute($stmt, OCI_DEFAULT);
OCICommit($conn);
$clob->close();
$clob->free();
OCIFreeStatement($stmt);
?>
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