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37 lines
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HTML
37 lines
2.1 KiB
HTML
<!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>检查字段是否为 NULL</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-is-null" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">oci_field_is_null</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_is_null</span> — <span class="dc-title">检查字段是否为 <strong><code>NULL</code></strong></span></p>
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</div>
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<div class="refsect1 unknown-seealsp" id="refsect1-function.oci-field-is-null-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_field_is_null</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$statement</code></span>
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, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$field</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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如果 <code class="parameter">statement</code> 语句结果中返回的
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<code class="parameter">field</code> 字段的值是
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<strong><code>NULL</code></strong>，<span class="function"><strong>oci_field_is_null()</strong></span> 返回
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<strong><code>TRUE</code></strong>。<code class="parameter">field</code> 参数可以是字段的索引或字段名（大写字母）。
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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="ocicolumnisnull.html" class="function">ocicolumnisnull()</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_is_null()</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> |