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><A
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>oci_new_descriptor</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN158814"
></A
><P
> (PHP 5)</P
>oci_new_descriptor -- 初始化一个新的空 LOB 或 FILE 描述符</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN158817"
></A
><H2
>说明</H2
>OCI-Lob <B
CLASS="methodname"
>oci_new_descriptor</B
> ( resource connection [, int type] )<BR
></BR
><P
> <B
CLASS="function"
>oci_new_descriptor()</B
> 分配资源以保存描述符或
LOB 定位器。有效的 <CODE
CLASS="parameter"
>type</CODE
> 值是：<TT
CLASS="constant"
><B
>OCI_D_FILE</B
></TT
>，<TT
CLASS="constant"
><B
>OCI_D_LOB</B
></TT
>
以及 <TT
CLASS="constant"
><B
>OCI_D_ROWID</B
></TT
>。
</P
><P
> <TABLE
WIDTH="100%"
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN158835"
></A
><P
><B
>例 1. <B
CLASS="function"
>oci_new_descriptor()</B
> 例子</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB"><?php<br /> </font><font color="#FF8000">/* This script is designed to be called from a HTML form.<br /> * It expects $user, $password, $table, $where, and $commitsize<br /> * to be passed in from the form. The script then deletes<br /> * the selected rows using the ROWID and commits after each<br /> * set of $commitsize rows. (Use with care, there is no rollback)<br /> */<br /> </font><font color="#0000BB">$conn </font><font color="#007700">= </font><font color="#0000BB">oci_connect</font><font color="#007700">(</font><font color="#0000BB">$user</font><font color="#007700">, </font><font color="#0000BB">$password</font><font color="#007700">);<br /> </font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">oci_parse</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#DD0000">"select rowid from $table $where"</font><font color="#007700">);<br /> </font><font color="#0000BB">$rowid </font><font color="#007700">= </font><font color="#0000BB">oci_new_descriptor</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#0000BB">OCI_D_ROWID</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_define_by_name</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#DD0000">"ROWID"</font><font color="#007700">, </font><font color="#0000BB">$rowid</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_execute</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /> while (</font><font color="#0000BB">oci_fetch</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">)) {<br /> </font><font color="#0000BB">$nrows </font><font color="#007700">= </font><font color="#0000BB">oci_num_rows</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /> </font><font color="#0000BB">$delete </font><font color="#007700">= </font><font color="#0000BB">oci_parse</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#DD0000">"delete from $table where ROWID = :rid"</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_bind_by_name</font><font color="#007700">(</font><font color="#0000BB">$delete</font><font color="#007700">, </font><font color="#DD0000">":rid"</font><font color="#007700">, </font><font color="#0000BB">$rowid</font><font color="#007700">, -</font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">OCI_B_ROWID</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_execute</font><font color="#007700">(</font><font color="#0000BB">$delete</font><font color="#007700">);<br /> echo </font><font color="#DD0000">"$nrows</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br /> if ((</font><font color="#0000BB">$nrows </font><font color="#007700">% </font><font color="#0000BB">$commitsize</font><font color="#007700">) == </font><font color="#0000BB">0</font><font color="#007700">) {<br /> </font><font color="#0000BB">oci_commit</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">);<br /> }<br /> }<br /> </font><font color="#0000BB">$nrows </font><font color="#007700">= </font><font color="#0000BB">oci_num_rows</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /> echo </font><font color="#DD0000">"$nrows deleted...</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br /> </font><font color="#0000BB">oci_free_statement</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_close</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">);<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
></TR
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><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB"><?php<br /> </font><font color="#FF8000">/* This script demonstrates file upload to LOB columns<br /> * The formfield used for this example looks like this<br /> * <form action="upload.php" method="post" enctype="multipart/form-data"><br /> * <input type="file" name="lob_upload" /><br /> * ...<br /> */<br /> </font><font color="#007700">if (!isset(</font><font color="#0000BB">$lob_upload</font><font color="#007700">) || </font><font color="#0000BB">$lob_upload </font><font color="#007700">== </font><font color="#DD0000">'none'</font><font color="#007700">){<br /></font><font color="#0000BB">?><br /></font><form action="upload.php" method="post" enctype="multipart/form-data"><br />Upload file: <input type="file" name="lob_upload" /><br /><br /><input type="submit" value="Upload" /> - <input type="reset" value="Reset" /><br /></form><br /><font color="#0000BB"><?php<br /> </font><font color="#007700">} else {<br /><br /> </font><font color="#FF8000">// $lob_upload contains the temporary filename of the uploaded file<br /><br /> // see also the features section on file upload,<br /> // if you would like to use secure uploads<br /><br /> </font><font color="#0000BB">$conn </font><font color="#007700">= </font><font color="#0000BB">oci_connect</font><font color="#007700">(</font><font color="#0000BB">$user</font><font color="#007700">, </font><font color="#0000BB">$password</font><font color="#007700">);<br /> </font><font color="#0000BB">$lob </font><font color="#007700">= </font><font color="#0000BB">oci_new_descriptor</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#0000BB">OCI_D_LOB</font><font color="#007700">);<br /> </font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">oci_parse</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#DD0000">"insert into $table (id, the_blob)<br /> values(my_seq.NEXTVAL, EMPTY_BLOB()) returning the_blob into :the_blob"</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_bind_by_name</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#DD0000">':the_blob'</font><font color="#007700">, </font><font color="#0000BB">$lob</font><font color="#007700">, -</font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">OCI_B_BLOB</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_execute</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#0000BB">OCI_DEFAULT</font><font color="#007700">);<br /> if (</font><font color="#0000BB">$lob</font><font color="#007700">-></font><font color="#0000BB">savefile</font><font color="#007700">(</font><font color="#0000BB">$lob_upload</font><font color="#007700">)){<br /> </font><font color="#0000BB">oci_commit</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">);<br /> echo </font><font color="#DD0000">"Blob successfully uploaded\n"</font><font color="#007700">;<br /> }else{<br /> echo </font><font color="#DD0000">"Couldn't upload Blob\n"</font><font color="#007700">;<br /> }<br /> </font><font color="#0000BB">oci_free_descriptor</font><font color="#007700">(</font><font color="#0000BB">$lob</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_free_statement</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_close</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">);<br /> }<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
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>
<TABLE
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CELLPADDING="0"
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN158840"
></A
><P
><B
>例 2. <B
CLASS="function"
>oci_new_descriptor()</B
> 例子</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB"><?php<br /> </font><font color="#FF8000">/* Calling PL/SQL stored procedures which contain clobs as input<br /> * parameters (PHP 4 >= 4.0.6).<br /> * Example PL/SQL stored procedure signature is:<br /> *<br /> * PROCEDURE save_data<br /> * Argument Name Type In/Out Default?<br /> * ------------------------------ ----------------------- ------ --------<br /> * KEY NUMBER(38) IN<br /> * DATA CLOB IN<br /> *<br /> */<br /><br /> </font><font color="#0000BB">$conn </font><font color="#007700">= </font><font color="#0000BB">oci_connect</font><font color="#007700">(</font><font color="#0000BB">$user</font><font color="#007700">, </font><font color="#0000BB">$password</font><font color="#007700">);<br /> </font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">oci_parse</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#DD0000">"begin save_data(:key, :data); end;"</font><font color="#007700">);<br /> </font><font color="#0000BB">$clob </font><font color="#007700">= </font><font color="#0000BB">oci_new_descriptor</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#0000BB">OCI_D_LOB</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_bind_by_name</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#DD0000">':key'</font><font color="#007700">, </font><font color="#0000BB">$key</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_bind_by_name</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#DD0000">':data'</font><font color="#007700">, </font><font color="#0000BB">$clob</font><font color="#007700">, -</font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">OCI_B_CLOB</font><font color="#007700">);<br /> </font><font color="#0000BB">$clob</font><font color="#007700">-></font><font color="#0000BB">write</font><font color="#007700">(</font><font color="#0000BB">$data</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_execute</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#0000BB">OCI_DEFAULT</font><font color="#007700">);<br /> </font><font color="#0000BB">oci_commit</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">);<br /> </font><font color="#0000BB">$clob</font><font color="#007700">-></font><font color="#0000BB">free</font><font color="#007700">();<br /> </font><font color="#0000BB">oci_free_statement</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
</P
><P
> <B
CLASS="function"
>oci_new_descriptor()</B
> 如果出错返回 <TT
CLASS="constant"
><B
>FALSE</B
></TT
>。
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
在 PHP 5.0.0 之前的版本必须使用 <A
HREF="function.ocinewdescriptor.html"
><B
CLASS="function"
>ocinewdescriptor()</B
></A
>
替代本函数。该函数名仍然可用，为向下兼容作为
<B
CLASS="function"
>oci_new_descriptor()</B
> 的别名。不过其已被废弃，不推荐使用。
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