oci_new_descriptor

(PHP 5, PECL oci8:1.1-1.2.4)

oci_new_descriptor — Initializes a new empty LOB or FILE descriptor

Description

OCI-Lob oci_new_descriptor ( resource $connection [, int $type ] )

Allocates resources to hold descriptor or LOB locator.

Parameters

connection: An Oracle connection identifier, returned by oci_connect() or oci_pconnect().
type: Valid values for type are: OCI_D_FILE, OCI_D_LOB and OCI_D_ROWID.

Return Values

Returns a new LOB or FILE descriptor on success, FALSE on error.

Examples

Example #1 oci_new_descriptor() example


<?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";

     }

     oci_free_descriptor($lob);

     oci_free_statement($stmt);

     oci_close($conn);

  }

?>

Example #2 oci_new_descriptor() example


<?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

 *

 */



$conn = oci_connect($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);

?>

Notes

Note: In PHP versions before 5.0.0 you must use ocinewdescriptor() instead. This name still can be used, it was left as alias of oci_new_descriptor() for downwards compatability. This, however, is deprecated and not recommended.