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Описание

object oci_new_descriptor ( resource connection [, int type] )

oci_new_descriptor() выделяет ресурсы, необходимые для хранения дескриптора объекта. Аргумент type может принимать следующие значения: OCI_D_FILE, OCI_D_LOB или OCI_D_ROWID.

Пример 1. Пример использования oci_new_descriptor()


<?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



     // Смотрите также 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_execute
(
$conn
);

        echo 
"Blob successfully uploaded\n"
;

     }else{

        echo 
"Couldn't upload Blob\n"
;

     }

     
oci_free_descriptor
(
$lob
);

     
oci_free_statement
(
$stmt
);

     
oci_close
(
$conn
);

  }


?>

Пример 2. Второй пример использования oci_new_descriptor()


<?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
);


?>

Замечание: В версиях PHP ниже 5.0.0 эта функция называлась ocinewdescriptor(). В PHP 5.0.0 и выше ocinewdescriptor() является алиасом oci_new_descriptor(), поэтому вы можете продолжать использовать это имя, однако это не рекомендуется.

oci_new_descriptor() вернет FALSE в случае ошибки.