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55 lines
6.2 KiB
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>在 SELECT 中使用 PHP 变量作为定义的步骤</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.oci-define-by-name" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">oci_define_by_name</h1>
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<p class="verinfo">(PHP 5, PHP 7, PECL OCI8 >= 1.1.0)</p><p class="refpurpose"><span class="refname">oci_define_by_name</span> — <span class="dc-title">在 SELECT 中使用 PHP 变量作为定义的步骤</span></p>
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</div>
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<div class="refsect1 unknown-seealsp" id="refsect1-function.oci-define-by-name-unknown-seealsp">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>oci_define_by_name</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$statement</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$column_name</code></span>
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, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter reference">&$variable</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$type</code></span>
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] ) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>oci_define_by_name()</strong></span> 绑定 PHP 到获取的
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SQL 列。 需要注意的是，Oracle 使用大写字母的列名，而用户在
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select 中也可以用小写字母。<span class="function"><strong>oci_define_by_name()</strong></span>
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期望 <code class="parameter">column_name</code> 是大写字母。如果定义一个变量不存在于
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select 语句中，将没有错误被给出。
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</p>
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<p class="para">
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如果需要定义一个抽象数据类型（LOB/ROWID/BFILE），必须先用
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<span class="function"><a href="oci_new_descriptor.html" class="function">oci_new_descriptor()</a></span> 分配空间。参见
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<span class="function"><a href="oci_bind_by_name.html" class="function">oci_bind_by_name()</a></span> 函数。
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</p>
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<div class="example" id="example-2405">
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<p><strong>Example #1 <span class="function"><strong>oci_define_by_name()</strong></span> 例子</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">/* oci_define_by_name example - thies at thieso dot net (980219) */<br /><br /></span><span style="color: #0000BB">$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"scott"</span><span style="color: #007700">, </span><span style="color: #DD0000">"tiger"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_parse</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"SELECT empno, ename FROM emp"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* the define MUST be done BEFORE oci_execute! */<br /><br /></span><span style="color: #0000BB">oci_define_by_name</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #DD0000">"EMPNO"</span><span style="color: #007700">, </span><span style="color: #0000BB">$empno</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">oci_define_by_name</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #DD0000">"ENAME"</span><span style="color: #007700">, </span><span style="color: #0000BB">$ename</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">oci_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">);<br /><br />while (</span><span style="color: #0000BB">oci_fetch</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">"empno:" </span><span style="color: #007700">. </span><span style="color: #0000BB">$empno </span><span style="color: #007700">. </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"ename:" </span><span style="color: #007700">. </span><span style="color: #0000BB">$ename </span><span style="color: #007700">. </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">oci_free_statement</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">oci_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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在 PHP 5.0.0 之前的版本必须使用 <span class="function"><a href="ocidefinebyname.html" class="function">ocidefinebyname()</a></span>
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替代本函数。该函数名仍然可用，为向下兼容作为
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<span class="function"><strong>oci_define_by_name()</strong></span> 的别名。不过其已被废弃，不推荐使用。
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</p>
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</p></blockquote>
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</div>
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</div></div></div></body></html> |