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102 lines
9.8 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>Cancels a statement</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.sqlsrv-cancel" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">sqlsrv_cancel</h1>
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<p class="verinfo">(No version information available, might only be in Git)</p><p class="refpurpose"><span class="refname">sqlsrv_cancel</span> — <span class="dc-title">Cancels a statement</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.sqlsrv-cancel-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>sqlsrv_cancel</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="type">bool</span></div>
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<p class="para rdfs-comment">
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Cancels a statement. Any results associated with the statement that have not
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been consumed are deleted. After <span class="function"><strong>sqlsrv_cancel()</strong></span> has been
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called, the specified statement can be re-executed if it was created with
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<span class="function"><a href="sqlsrv_prepare.html" class="function">sqlsrv_prepare()</a></span>. Calling <span class="function"><strong>sqlsrv_cancel()</strong></span>
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is not necessary if all the results associated with the statement have been
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consumed.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.sqlsrv-cancel-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">stmt</code></dt>
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<dd>
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<p class="para">
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The statement resource to be cancelled.
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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.sqlsrv-cancel-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.sqlsrv-cancel-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-2567">
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<p><strong>Example #1 <span class="function"><strong>sqlsrv_cancel()</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 />$serverName </span><span style="color: #007700">= </span><span style="color: #DD0000">"serverName\sqlexpress"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$connectionInfo </span><span style="color: #007700">= array( </span><span style="color: #DD0000">"Database"</span><span style="color: #007700">=></span><span style="color: #DD0000">"dbName"</span><span style="color: #007700">, </span><span style="color: #DD0000">"UID"</span><span style="color: #007700">=></span><span style="color: #DD0000">"username"</span><span style="color: #007700">, </span><span style="color: #DD0000">"PWD"</span><span style="color: #007700">=></span><span style="color: #DD0000">"password"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">sqlsrv_connect</span><span style="color: #007700">( </span><span style="color: #0000BB">$serverName</span><span style="color: #007700">, </span><span style="color: #0000BB">$connectionInfo</span><span style="color: #007700">);<br />if( </span><span style="color: #0000BB">$conn </span><span style="color: #007700">=== </span><span style="color: #0000BB">false </span><span style="color: #007700">) {<br /> die( </span><span style="color: #0000BB">print_r</span><span style="color: #007700">( </span><span style="color: #0000BB">sqlsrv_errors</span><span style="color: #007700">(), </span><span style="color: #0000BB">true</span><span style="color: #007700">));<br />}<br /><br /></span><span style="color: #0000BB">$sql </span><span style="color: #007700">= </span><span style="color: #DD0000">"SELECT Sales FROM Table_1"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">sqlsrv_prepare</span><span style="color: #007700">( </span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #0000BB">$sql</span><span style="color: #007700">);<br /><br />if( </span><span style="color: #0000BB">$stmt </span><span style="color: #007700">=== </span><span style="color: #0000BB">false </span><span style="color: #007700">) {<br /> die( </span><span style="color: #0000BB">print_r</span><span style="color: #007700">( </span><span style="color: #0000BB">sqlsrv_errors</span><span style="color: #007700">(), </span><span style="color: #0000BB">true</span><span style="color: #007700">));<br />}<br /><br />if( </span><span style="color: #0000BB">sqlsrv_execute</span><span style="color: #007700">( </span><span style="color: #0000BB">$stmt </span><span style="color: #007700">) === </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> die( </span><span style="color: #0000BB">print_r</span><span style="color: #007700">( </span><span style="color: #0000BB">sqlsrv_errors</span><span style="color: #007700">(), </span><span style="color: #0000BB">true</span><span style="color: #007700">));<br />}<br /><br /></span><span style="color: #0000BB">$salesTotal </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$count </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">;<br /><br />while( (</span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">sqlsrv_fetch_array</span><span style="color: #007700">( </span><span style="color: #0000BB">$stmt</span><span style="color: #007700">)) && </span><span style="color: #0000BB">$salesTotal </span><span style="color: #007700"><=</span><span style="color: #0000BB">100000</span><span style="color: #007700">)<br />{<br /> </span><span style="color: #0000BB">$qty </span><span style="color: #007700">= </span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">];<br /> </span><span style="color: #0000BB">$price </span><span style="color: #007700">= </span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">];<br /> </span><span style="color: #0000BB">$salesTotal </span><span style="color: #007700">+= ( </span><span style="color: #0000BB">$price </span><span style="color: #007700">* </span><span style="color: #0000BB">$qty</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$count</span><span style="color: #007700">++;<br />}<br /><br />echo </span><span style="color: #DD0000">"</span><span style="color: #0000BB">$count</span><span style="color: #DD0000"> sales accounted for the first $</span><span style="color: #0000BB">$salesTotal</span><span style="color: #DD0000"> in revenue.<br />"</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Cancel the pending results. The statement can be reused.<br /></span><span style="color: #0000BB">sqlsrv_cancel</span><span style="color: #007700">( </span><span style="color: #0000BB">$stmt</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 notes" id="refsect1-function.sqlsrv-cancel-notes">
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<h3 class="title">注释</h3>
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<p class="para">
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The main difference between <span class="function"><strong>sqlsrv_cancel()</strong></span> and
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<span class="function"><a href="sqlsrv_free_stmt.html" class="function">sqlsrv_free_stmt()</a></span> is that a statement resource cancelled with
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<span class="function"><strong>sqlsrv_cancel()</strong></span> can be re-executed if it was created with
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<span class="function"><a href="sqlsrv_prepare.html" class="function">sqlsrv_prepare()</a></span>. A statement resource cancelled with
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<span class="function"><strong>sqlsrv_free_statement()</strong></span> cannot be re-executed.
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.sqlsrv-cancel-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="sqlsrv_free_stmt.html" class="function" rel="rdfs-seeAlso">sqlsrv_free_stmt()</a> - Frees all resources for the specified statement</span></li>
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<li class="member"><span class="function"><a href="sqlsrv_prepare.html" class="function" rel="rdfs-seeAlso">sqlsrv_prepare()</a> - Prepares a query for execution</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> |