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<title>Open persistent MS SQL connection</title>
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<h1 class="refname">mssql_pconnect</h1>
<p class="verinfo">(PHP 4, PHP 5, PECL odbtp >= 1.1.1)</p><p class="refpurpose"><span class="refname">mssql_pconnect</span> — <span class="dc-title">Open persistent MS SQL connection</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.mssql-pconnect-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">resource</span> <span class="methodname"><strong>mssql_pconnect</strong></span>
([ <span class="methodparam"><span class="type">string</span> <code class="parameter">$servername</code></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$username</code></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$password</code></span>
[, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$new_link</code><span class="initializer"> = false</span></span>
]]]] )</div>
<p class="para rdfs-comment">
<span class="function"><strong>mssql_pconnect()</strong></span> acts very much like
<span class="function"><a href="function.mssql-connect.html" class="function">mssql_connect()</a></span> with two major differences.
</p>
<p class="para">
First, when connecting, the function would first try to find a
(persistent) link that's already open with the same host,
username and password. If one is found, an identifier for it
will be returned instead of opening a new connection.
</p>
<p class="para">
Second, the connection to the SQL server will not be closed when
the execution of the script ends. Instead, the link will remain
open for future use ( <span class="function"><a href="function.mssql-close.html" class="function">mssql_close()</a></span> will not
close links established by <span class="function"><strong>mssql_pconnect()</strong></span>).
</p>
<p class="para">
This type of links is therefore called 'persistent'.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.mssql-pconnect-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">servername</code></em></span>
<dd>
<p class="para">
The MS SQL server. It can also include a port number. e.g.
<em>hostname:port</em>.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">username</code></em></span>
<dd>
<p class="para">
The username.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">password</code></em></span>
<dd>
<p class="para">
The password.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">new_link</code></em></span>
<dd>
<p class="para">
If a second call is made to <span class="function"><strong>mssql_pconnect()</strong></span> with
the same arguments, no new link will be established, but instead, the
link identifier of the already opened link will be returned. This
parameter modifies this behavior and makes
<span class="function"><strong>mssql_pconnect()</strong></span> always open a new link, even if
<span class="function"><strong>mssql_pconnect()</strong></span> was called before with the same
parameters.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.mssql-pconnect-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns a positive MS SQL persistent link identifier on success, or
<strong><code>FALSE</code></strong> on error.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.mssql-pconnect-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-1547">
<p><strong>Example #1 <span class="function"><strong>mssql_pconnect()</strong></span> using the <em><code class="parameter">new_link</code></em> parameter</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Connect to MSSQL and select the database<br /></span><span style="color: #0000BB">$link1 </span><span style="color: #007700">= </span><span style="color: #0000BB">mssql_pconnect</span><span style="color: #007700">(</span><span style="color: #DD0000">'MANGO\SQLEXPRESS'</span><span style="color: #007700">, </span><span style="color: #DD0000">'sa'</span><span style="color: #007700">, </span><span style="color: #DD0000">'phpfi'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">mssql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">'php'</span><span style="color: #007700">, </span><span style="color: #0000BB">$link1</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Create a new link<br /></span><span style="color: #0000BB">$link2 </span><span style="color: #007700">= </span><span style="color: #0000BB">mssql_pconnect</span><span style="color: #007700">(</span><span style="color: #DD0000">'MANGO\SQLEXPRESS'</span><span style="color: #007700">, </span><span style="color: #DD0000">'sa'</span><span style="color: #007700">, </span><span style="color: #DD0000">'phpfi'</span><span style="color: #007700">, </span><span style="color: #0000BB">true</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">mssql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">'random'</span><span style="color: #007700">, </span><span style="color: #0000BB">$link2</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
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