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52 lines
7.8 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>返回字段大小</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-field-size" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">oci_field_size</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_field_size</span> — <span class="dc-title">返回字段大小</span></p>
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</div>
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<div class="refsect1 unknown-unknown-unknown-unknown-unknown-seealst" id="refsect1-function.oci-field-size-unknown-unknown-unknown-unknown-unknown-seealst">
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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_field_size</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$stmt</code></span>
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, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$field</code></span>
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) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>oci_field_size()</strong></span>
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以字节为单位返回字段的大小。<code class="parameter">field</code>
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参数的值可以是字段的索引（从 1 开始）或者字段名。
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</p>
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<p class="para">
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<div class="example" id="example-2437">
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<p><strong>Example #1 <span class="function"><strong>oci_field_size()</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 /> $conn </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"scott"</span><span style="color: #007700">, </span><span style="color: #DD0000">"tiger"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_parse</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"SELECT * FROM emp"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">oci_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">);<br /><br /> echo </span><span style="color: #DD0000">"<table border=\"1\">"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"<tr>"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"<th>Name</th>"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"<th>Type</th>"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"<th>Length</th>"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"</tr>"</span><span style="color: #007700">;<br /><br /> </span><span style="color: #0000BB">$ncols </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_num_fields</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">);<br /><br /> for (</span><span style="color: #0000BB">$i </span><span style="color: #007700">= </span><span style="color: #0000BB">1</span><span style="color: #007700">; </span><span style="color: #0000BB">$i </span><span style="color: #007700"><= </span><span style="color: #0000BB">$ncols</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700">++) {<br /> </span><span style="color: #0000BB">$column_name </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_field_name</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">$i</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$column_type </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_field_type</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">$i</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$column_size </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_field_size</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">$i</span><span style="color: #007700">);<br /> echo </span><span style="color: #DD0000">"<tr>"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"<td></span><span style="color: #0000BB">$column_name</span><span style="color: #DD0000"></td>"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"<td></span><span style="color: #0000BB">$column_type</span><span style="color: #DD0000"></td>"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"<td></span><span style="color: #0000BB">$column_size</span><span style="color: #DD0000"></td>"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"</tr>"</span><span style="color: #007700">;<br /> }<br /><br /> echo </span><span style="color: #DD0000">"</table>"</span><span style="color: #007700">;<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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</p>
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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="ocicolumnsize.html" class="function">ocicolumnsize()</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_field_size()</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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<p class="simpara">
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参见 <span class="function"><a href="oci_num_fields.html" class="function">oci_num_fields()</a></span> 和
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<span class="function"><a href="oci_field_name.html" class="function">oci_field_name()</a></span>。
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</p>
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</div>
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</div></div></div></body></html> |