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157 lines
7.5 KiB
HTML
157 lines
7.5 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>Send a FrontBase query</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.fbsql-query" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">fbsql_query</h1>
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<p class="verinfo">(PHP 4 >= 4.0.6, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">fbsql_query</span> — <span class="dc-title">Send a FrontBase query</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.fbsql-query-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>fbsql_query</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$query</code></span>
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[, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$link_identifier</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$batch_size</code></span>
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]] ) : <span class="type">resource</span></div>
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<p class="para rdfs-comment">
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Sends a <code class="parameter">query</code> to the currently active database on
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the server.
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</p>
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<p class="para">
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If the query succeeds, you can call <span class="function"><a href="fbsql_num_rows.html" class="function">fbsql_num_rows()</a></span> to
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find out how many rows were returned for a SELECT statement or
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<span class="function"><a href="fbsql_affected_rows.html" class="function">fbsql_affected_rows()</a></span> to find out how many rows were
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affected by a DELETE, INSERT, REPLACE, or UPDATE statement.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.fbsql-query-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">query</code></dt>
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<dd>
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<p class="para">
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The SQL query to be executed.
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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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The query string shall always end with a semicolon.
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</p>
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</p></blockquote>
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</dd>
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<dt>
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<code class="parameter">
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link_identifier</code></dt>
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<dd>
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<p class="para">由
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<span class="function"><a href="fbsql_connect.html" class="function">fbsql_connect()</a></span> 或
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<span class="function"><a href="fbsql_pconnect.html" class="function">fbsql_pconnect()</a></span> 返回的 FrontBase 链接标识符.</p>
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<p class="para">如可选并未指定，函数会尝试查找一个到 FrontBase 服务器的开放链接，且如没有找到这样的链接，会尝试通过不带参数调用 <span class="function"><a href="fbsql_connect.html" class="function">fbsql_connect()</a></span> 来创建一个。</p>
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</dd>
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<dt>
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<code class="parameter">batch_size</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.fbsql-query-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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<span class="function"><strong>fbsql_query()</strong></span> returns <strong><code>TRUE</code></strong> (non-zero) or <strong><code>FALSE</code></strong>
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to indicate whether or not the query succeeded. A return value
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of <strong><code>TRUE</code></strong> means that the query was legal and could be executed by
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the server. It does not indicate anything about the number of
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rows affected or returned. It is perfectly possible for a query
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to succeed but affect no rows or return no rows.
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</p>
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<p class="para">
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For SELECT statements, <span class="function"><strong>fbsql_query()</strong></span> returns a new
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result identifier that you can pass to <span class="function"><a href="fbsql_result.html" class="function">fbsql_result()</a></span>.
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</p>
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<p class="para">
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<span class="function"><strong>fbsql_query()</strong></span> will also fail and return <strong><code>FALSE</code></strong> if you
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don't have permission to access the table(s) referenced by the query.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.fbsql-query-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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The following query is syntactically invalid, so
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<span class="function"><strong>fbsql_query()</strong></span> fails and returns <strong><code>FALSE</code></strong>:
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<div class="example" id="example-1223">
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<p><strong>Example #1 <span class="function"><strong>fbsql_query()</strong></span> example</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 />$result </span><span style="color: #007700">= </span><span style="color: #0000BB">fbsql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT * WHERE 1=1"</span><span style="color: #007700">)<br /> or die (</span><span style="color: #DD0000">"Invalid query"</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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<p class="para">
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The following query is semantically invalid if
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<em>my_col</em> is not a column in the table
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<em>my_tbl</em>, so <span class="function"><strong>fbsql_query()</strong></span>
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fails and returns <strong><code>FALSE</code></strong>:
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<div class="example" id="example-1224">
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<p><strong>Example #2 <span class="function"><strong>fbsql_query()</strong></span> example</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 />$result </span><span style="color: #007700">= </span><span style="color: #0000BB">fbsql_query </span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT my_col FROM my_tbl;"</span><span style="color: #007700">)<br /> or die (</span><span style="color: #DD0000">"Invalid query"</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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</div>
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<div class="refsect1 seealso" id="refsect1-function.fbsql-query-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="fbsql_affected_rows.html" class="function" rel="rdfs-seeAlso">fbsql_affected_rows()</a> - Get number of affected rows in previous FrontBase operation</span></li>
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<li class="member"><span class="function"><a href="fbsql_db_query.html" class="function" rel="rdfs-seeAlso">fbsql_db_query()</a> - Send a FrontBase query</span></li>
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<li class="member"><span class="function"><a href="fbsql_free_result.html" class="function" rel="rdfs-seeAlso">fbsql_free_result()</a> - Free result memory</span></li>
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<li class="member"><span class="function"><a href="fbsql_result.html" class="function" rel="rdfs-seeAlso">fbsql_result()</a> - Get result data</span></li>
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<li class="member"><span class="function"><a href="fbsql_select_db.html" class="function" rel="rdfs-seeAlso">fbsql_select_db()</a> - Select a FrontBase database</span></li>
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<li class="member"><span class="function"><a href="fbsql_connect.html" class="function" rel="rdfs-seeAlso">fbsql_connect()</a> - Open a connection to a FrontBase Server</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> |