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115 lines
4.0 KiB
HTML
115 lines
4.0 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>Set a constraint on a relation</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.dbplus-find" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">dbplus_find</h1>
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<p class="verinfo">(PHP 4 <= 4.1.0, PECL dbplus >= 0.9)</p><p class="refpurpose"><span class="refname">dbplus_find</span> — <span class="dc-title">Set a constraint on a relation</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.dbplus-find-description">
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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>dbplus_find</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$relation</code></span>
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, <span class="methodparam"><span class="type">array</span> <code class="parameter">$constraints</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">$tuple</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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Places a constraint on the given <code class="parameter">relation</code>.
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</p>
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<p class="para">
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Further calls to functions like <span class="function"><a href="dbplus_curr.html" class="function">dbplus_curr()</a></span> or
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<span class="function"><a href="dbplus_next.html" class="function">dbplus_next()</a></span> will only return tuples matching the
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given constraints.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.dbplus-find-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">relation</code></dt>
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<dd>
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<p class="para">
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A relation opened by <span class="function"><a href="dbplus_open.html" class="function">dbplus_open()</a></span>.
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</p>
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</dd>
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<dt>
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<code class="parameter">constraints</code></dt>
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<dd>
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<p class="para">
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Constraints are triplets of strings containing of a domain name,
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a comparison operator and a comparison value. The
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<code class="parameter">constraints</code> parameter array may consist of
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a collection of string arrays, each of which contains a domain, an
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operator and a value, or of a single string array containing a
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multiple of three elements.
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</p>
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<p class="para">
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The comparison operator may be one of the following strings:
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'==', '>', '>=', '<', '<=', '!=', '~' for a regular
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expression match and 'BAND' or 'BOR' for bitwise operations.
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</p>
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</dd>
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<dt>
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<code class="parameter">tuple</code></dt>
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<dd>
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<p class="para">
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.dbplus-find-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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</p>
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</div>
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<div class="refsect1 notes" id="refsect1-function.dbplus-find-notes">
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<h3 class="title">注释</h3>
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<div class="warning"><strong class="warning">Warning</strong><p class="simpara">此函数是<em class="emphasis">实验性</em>的。此函数的表象，包括名称及其相关文档都可能在未来的
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PHP 发布版本中未通知就被修改。使用本函数风险自担 。</p></div>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.dbplus-find-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="dbplus_unselect.html" class="function" rel="rdfs-seeAlso">dbplus_unselect()</a> - Remove a constraint from relation</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |