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142 lines
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Sends a request to execute a prepared statement with given parameters, and waits for the result</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.pg-execute" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pg_execute</h1>
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<p class="verinfo">(PHP 5 >= 5.1.0, PHP 7)</p><p class="refpurpose"><span class="refname">pg_execute</span> — <span class="dc-title">Sends a request to execute a prepared statement with given parameters, and waits for the result</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.pg-execute-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>pg_execute</strong></span>
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([ <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
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], <span class="methodparam"><span class="type">string</span> <code class="parameter">$stmtname</code></span>
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, <span class="methodparam"><span class="type">array</span> <code class="parameter">$params</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 request to execute a prepared statement with given parameters, and
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waits for the result.
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</p>
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<p class="para">
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<span class="function"><strong>pg_execute()</strong></span> is like <span class="function"><a href="pg_query_params.html" class="function">pg_query_params()</a></span>,
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but the command to be executed is
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specified by naming a previously-prepared statement, instead of giving a
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query string. This feature allows commands that will be used repeatedly to
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be parsed and planned just once, rather than each time they are executed.
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The statement must have been prepared previously in the current session.
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<span class="function"><strong>pg_execute()</strong></span> is supported only against PostgreSQL 7.4 or
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higher connections; it will fail when using earlier versions.
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</p>
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<p class="para">
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The parameters are identical to <span class="function"><a href="pg_query_params.html" class="function">pg_query_params()</a></span>, except that the name of a
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prepared statement is given instead of a query string.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.pg-execute-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">connection</code></dt>
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<dd>
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<p class="para">
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PostgreSQL database connection resource. When
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<code class="parameter">connection</code> is not present, the default connection
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is used. The default connection is the last connection made by
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<span class="function"><a href="pg_connect.html" class="function">pg_connect()</a></span> or <span class="function"><a href="pg_pconnect.html" class="function">pg_pconnect()</a></span>.
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</p>
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</dd>
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<dt>
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<code class="parameter">stmtname</code></dt>
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<dd>
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<p class="para">
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The name of the prepared statement to execute. if
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"" is specified, then the unnamed statement is executed. The name must have
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been previously prepared using <span class="function"><a href="pg_prepare.html" class="function">pg_prepare()</a></span>,
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<span class="function"><a href="pg_send_prepare.html" class="function">pg_send_prepare()</a></span> or a <em>PREPARE</em> SQL
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command.
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</p>
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</dd>
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<dt>
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<code class="parameter">params</code></dt>
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<dd>
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<p class="para">
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An array of parameter values to substitute for the $1, $2, etc. placeholders
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in the original prepared query string. The number of elements in the array
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must match the number of placeholders.
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</p>
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<div class="warning"><strong class="warning">Warning</strong>
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<p class="para">
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Elements are converted to strings by calling this function.
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</p>
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</div>
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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.pg-execute-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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A query result resource on success 或者在失败时返回 <strong><code>FALSE</code></strong>.</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.pg-execute-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-2486">
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<p><strong>Example #1 Using <span class="function"><strong>pg_execute()</strong></span></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 /></span><span style="color: #FF8000">// Connect to a database named "mary"<br /></span><span style="color: #0000BB">$dbconn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=mary"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Prepare a query for execution<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_prepare</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_query"</span><span style="color: #007700">, </span><span style="color: #DD0000">'SELECT * FROM shops WHERE name = $1'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Execute the prepared query. Note that it is not necessary to escape<br />// the string "Joe's Widgets" in any way<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_query"</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"Joe's Widgets"</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">// Execute the same prepared query, this time with a different parameter<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_query"</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"Clothes Clothes Clothes"</span><span style="color: #007700">));<br /><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.pg-execute-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="pg_prepare.html" class="function" rel="rdfs-seeAlso">pg_prepare()</a> - Submits a request to create a prepared statement with the
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given parameters, and waits for completion</span></li>
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<li class="member"><span class="function"><a href="pg_send_prepare.html" class="function" rel="rdfs-seeAlso">pg_send_prepare()</a> - Sends a request to create a prepared statement with the given parameters, without waiting for completion</span></li>
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<li class="member"><span class="function"><a href="pg_query_params.html" class="function" rel="rdfs-seeAlso">pg_query_params()</a> - Submits a command to the server and waits for the result, with the ability to pass parameters separately from the SQL command text</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> |