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oci_new_descriptor

(PHP 5, PECL OCI8 >= 1.1.0)

oci_new_descriptorInitializes a new empty LOB or FILE descriptor

Description

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

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_DTYPE_FILE, OCI_DTYPE_LOB and OCI_DTYPE_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");
$rowid oci_new_descriptor($connOCI_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, -1OCI_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);
     
$lob oci_new_descriptor($connOCI_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, -1OCI_B_BLOB);
     
oci_execute($stmtOCI_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);
  }
?>

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;");
$clob oci_new_descriptor($connOCI_D_LOB);
oci_bind_by_name($stmt':key'$key);
oci_bind_by_name($stmt':data'$clob, -1OCI_B_CLOB);
$clob->write($data);
oci_execute($stmtOCI_DEFAULT);
oci_commit($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.

See Also

PHP Manual