📄 function.pg-send-prepare.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Sends a request to create a prepared statement with the given parameters, without waiting for completion.</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.pg-send-execute.html">pg_send_execute</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-send-query-params.html">pg_send_query_params</a></div> <div class="up"><a href="ref.pgsql.html">PostgreSQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.pg-send-prepare" class="refentry"> <div class="refnamediv"> <h1 class="refname">pg_send_prepare</h1> <p class="verinfo">(PHP 5 >= 5.1.0)</p><p class="refpurpose"><span class="refname">pg_send_prepare</span> — <span class="dc-title">Sends a request to create a prepared statement with the given parameters, without waiting for completion.</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>pg_send_prepare</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$connection</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$stmtname</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$query</tt></span> )</div> <p class="para rdfs-comment"> Sends a request to create a prepared statement with the given parameters, without waiting for completion. </p> <p class="para"> This is an asynchronous version of <a href="function.pg-prepare.html" class="function">pg_prepare()</a>: it returns <b><tt>TRUE</tt></b> if it was able to dispatch the request, and <b><tt>FALSE</tt></b> if not. After a successful call, call <a href="function.pg-get-result.html" class="function">pg_get_result()</a> to determine whether the server successfully created the prepared statement. The function's parameters are handled identically to <a href="function.pg-prepare.html" class="function">pg_prepare()</a>. Like <a href="function.pg-prepare.html" class="function">pg_prepare()</a>, it will not work on pre-7.4 versions of PostgreSQL. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">connection</tt></i></span> <dd> <p class="para"> PostgreSQL database connection resource. When <i><tt class="parameter">connection</tt></i> is not present, the default connection is used. The default connection is the last connection made by <a href="function.pg-connect.html" class="function">pg_connect()</a> or <a href="function.pg-pconnect.html" class="function">pg_pconnect()</a>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">stmtname</tt></i></span> <dd> <p class="para"> The name to give the prepared statement. Must be unique per-connection. If "" is specified, then an unnamed statement is created, overwriting any previously defined unnamed statement. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">query</tt></i></span> <dd> <p class="para"> The parameterised SQL statement. Must contain only a single statement. (multiple statements separated by semi-colons are not allowed.) If any parameters are used, they are referred to as $1, $2, etc. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para">Returns <b><tt>TRUE</tt></b> on success, <b><tt>FALSE</tt></b> on failure. Use <a href="function.pg-get-result.html" class="function">pg_get_result()</a> to determine the query result.</p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 Using <b>pg_send_prepare()</b></b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /> $dbconn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=publisher"</span><span style="color: #007700">) or die(</span><span style="color: #DD0000">"Could not connect"</span><span style="color: #007700">);<br /><br /> </span><span style="color: #FF8000">// Prepare a query for execution<br /> </span><span style="color: #007700">if (!</span><span style="color: #0000BB">pg_connection_busy</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">pg_send_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 = $1'</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$res1 </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_get_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">);<br /> }<br /><br /> </span><span style="color: #FF8000">// Execute the prepared query. Note that it is not necessary to escape<br /> // the string "Joe's Widgets" in any way<br /> </span><span style="color: #007700">if (!</span><span style="color: #0000BB">pg_connection_busy</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">pg_send_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_query"</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"Joe's Widgets"</span><span style="color: #007700">));<br /> </span><span style="color: #0000BB">$res2 </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_get_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">);<br /> }<br /> <br /> </span><span style="color: #FF8000">// Execute the same prepared query, this time with a different parameter<br /> </span><span style="color: #007700">if (!</span><span style="color: #0000BB">pg_connection_busy</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">pg_send_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_query"</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"Clothes Clothes Clothes"</span><span style="color: #007700">));<br /> </span><span style="color: #0000BB">$res3 </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_get_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">);<br /> }<br /> <br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.pg-connect.html" class="function" rel="rdfs-seeAlso">pg_connect()</a></li> <li class="member"><a href="function.pg-pconnect.html" class="function" rel="rdfs-seeAlso">pg_pconnect()</a></li> <li class="member"><a href="function.pg-execute.html" class="function" rel="rdfs-seeAlso">pg_execute()</a></li> <li class="member"><a href="function.pg-send-execute.html" class="function" rel="rdfs-seeAlso">pg_send_execute()</a></li> <li class="member"><a href="function.pg-send-query-params.html" class="function" rel="rdfs-seeAlso">pg_send_query_params()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.pg-send-execute.html">pg_send_execute</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-send-query-params.html">pg_send_query_params</a></div> <div class="up"><a href="ref.pgsql.html">PostgreSQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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