oci_new_descriptor

(PHP 5)

oci_new_descriptor -- 初始化一个新的空 LOB 或 FILE 描述符

说明

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

oci_new_descriptor() 分配资源以保存描述符或 LOB 定位器。有效的 type 值是:OCI_D_FILEOCI_D_LOB 以及 OCI_D_ROWID

例子 1. oci_new_descriptor() 例子

<?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);
  }
?>

例子 2. oci_new_descriptor() 例子

<?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);
?>

oci_new_descriptor() 如果出错返回 FALSE

注: 在 PHP 5.0.0 之前的版本必须使用 ocinewdescriptor() 替代本函数。该函数名仍然可用,为向下兼容作为 oci_new_descriptor() 的别名。不过其已被废弃,不推荐使用。


add a note add a note User Contributed Notes
Ben Hubbard ben at vonik dot com
08-Apr-2006 12:57
Here is another example of how to insert a BLOB into table using a PL/SQL function.

Oracle Database Code:

create table blob_table ( the_blob blob);

create or replace function insert_blob(out_blob out blob)
   return integer is
   begin
       insert into blob_table values (EMPTY_BLOB())
         return the_blob into out_blob;
       return 0; /* Success */
   end insert_blob;

PHP Code:

<?php
  $iResult
= -1;
 
$strTestData = 'Testing 123';
 
$conn = oci_connect($user, $password);
 
$stmt = oci_parse($conn, "begin :RES := insert_blob(:OUT_BLOB); end;");
 
 
$objBlob = oci_new_descriptor($conn, OCI_D_LOB);
 
oci_bind_by_name($stmt, ":RES", $iResult);
 
oci_bind_by_name($stmt, ":OUT_BLOB", $objBlob, -1, OCI_B_BLOB);
 
oci_execute($stmt, OCI_DEFAULT);
 
$objBlob->write($strTestData);
 
oci_commit($conn);
 
$objBlob->free();
 
oci_free_statement($stmt);
?>