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Dynamic Web Pages : deutschsprachiges PHP-Handbuch : oci-new-descriptor _

 
   
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<oci_new_cursor oci_num_fields>
Letzte Aktualisierung: Sat, 26 Jul 2014
 

oci_new_descriptor

(PHP 5)

oci_new_descriptor -- Initializes a new empty LOB or FILE descriptor

Description

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

oci_new_descriptor() allocates resources to hold descriptor or LOB locator. Valid values for type are: OCI_D_FILE, OCI_D_LOB and OCI_D_ROWID.

Beispiel 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);
  }
?>

Beispiel 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);
?>

oci_new_descriptor() returns FALSE on error.

Anmerkung: 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.



<oci_new_cursor oci_num_fields>
Letzte Aktualisierung: Sat, 26 Jul 2014
 


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