<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >oci_new_descriptor</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="Oracle 函数" HREF="ref.oci8.html"><LINK REL="PREVIOUS" TITLE="oci_new_cursor" HREF="function.oci-new-cursor.html"><LINK REL="NEXT" TITLE="oci_num_fields" HREF="function.oci-num-fields.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.oci-new-cursor.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.oci-num-fields.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.oci-new-descriptor" ></A >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%" BORDER="0" CELLPADDING="0" CELLSPACING="0" 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">$conn</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /> </font><font color="#FF8000">/* This script demonstrates file upload to LOB columns<br /> * The formfield used for this example looks like this<br /> * <form action="upload.php" method="post" enctype="multipart/form-data"><br /> * <input type="file" name="lob_upload" /><br /> * ...<br /> */<br /> </font><font color="#007700">if (!isset(</font><font color="#0000BB">$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 ></TABLE > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" 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。 </P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.oci-new-cursor.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.oci-num-fields.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >oci_new_cursor</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.oci8.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >oci_num_fields</TD ></TR ></TABLE ></DIV ></BODY ></HTML >