<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Performs a query on the database</title>
</head>
<body><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="function.maxdb-prepare.html">maxdb_prepare</a></div>
<div class="next" style="text-align: right; float: right;"><a href="function.maxdb-real-connect.html">maxdb_real_connect</a></div>
<div class="up"><a href="ref.maxdb.html">MaxDB Functions</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="function.maxdb-query" class="refentry">
<div class="refnamediv">
<h1 class="refname">maxdb_query</h1>
<h1 class="refname">maxdb::query</h1>
<p class="verinfo">(PECL maxdb >= 1.0)</p><p class="refpurpose"><span class="refname">maxdb_query</span> -- <span class="refname">maxdb::query</span> — <span class="dc-title">Performs a query on the database</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.maxdb-query-description">
<h3 class="title">Description</h3>
<p class="para">Procedural style</p>
<div class="methodsynopsis dc-description">
<span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><strong>maxdb_query</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$link</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$query</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$resultmode</code></span>
] )</div>
<p class="para rdfs-comment">Object oriented style</p>
<div class="methodsynopsis dc-description">
<span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><strong>maxdb::query</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$query</code></span>
)</div>
<p class="para rdfs-comment">
The <span class="function"><strong>maxdb_query()</strong></span> function is used to simplify the
act of performing a query against the database represented by the
<em><code class="parameter">link</code></em> parameter.
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.maxdb-query-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure. For <em>SELECT, SHOW, DESCRIBE</em> or
<em>EXPLAIN</em> <span class="function"><strong>maxdb_query()</strong></span> will return
a result resource.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.maxdb-query-examples">
<h3 class="title">Examples</h3>
<div class="example" id="example-1301">
<p><strong>Example #1 Object oriented style</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$maxdb </span><span style="color: #007700">= new </span><span style="color: #0000BB">maxdb</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">maxdb_connect_errno</span><span style="color: #007700">()) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #FF8000">/* Create table doesn't return a resultset */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"CREATE TABLE temp.mycity LIKE hotel.city"</span><span style="color: #007700">) === </span><span style="color: #0000BB">TRUE</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Table mycity successfully created.\n"</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #FF8000">/* Select queries return a resultset */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT name FROM hotel.city"</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Select returned %d rows.\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$result</span><span style="color: #007700">-></span><span style="color: #0000BB">num_rows</span><span style="color: #007700">);<br /><br /> </span><span style="color: #FF8000">/* free result set */<br /> </span><span style="color: #0000BB">$result</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br />}<br /><br /></span><span style="color: #FF8000">/* If we have to retrieve large amount of data we use MAXDB_USE_RESULT */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT * FROM hotel.city"</span><span style="color: #007700">, </span><span style="color: #0000BB">MAXDB_USE_RESULT</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">$result</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br />}<br /><br /></span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
<div class="example" id="example-1302">
<p><strong>Example #2 Procedural style</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">maxdb_connect_errno</span><span style="color: #007700">()) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #FF8000">/* Create table doesn't return a resultset */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">maxdb_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #DD0000">"CREATE TABLE temp.mycity LIKE hotel.city"</span><span style="color: #007700">) === </span><span style="color: #0000BB">TRUE</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Table mycity successfully created.\n"</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #FF8000">/* Select queries return a resultset */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #DD0000">"SELECT name FROM hotel.city"</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Select returned %d rows.\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_num_rows</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">));<br /><br /> </span><span style="color: #FF8000">/* free result set */<br /> </span><span style="color: #0000BB">maxdb_free_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #FF8000">/* If we have to retrieve large amount of data we use MAXDB_USE_RESULT */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #DD0000">"SELECT * FROM hotel.city"</span><span style="color: #007700">, </span><span style="color: #0000BB">MAXDB_USE_RESULT</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">maxdb_free_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #0000BB">maxdb_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
<p class="para">The above example will output
something similar to:</p>
<div class="example-contents screen">
<div class="cdata"><pre>
Table mycity successfully created.
Select returned 25 rows.
</pre></div>
</div>
</div>
<div class="refsect1 seealso" id="refsect1-function.maxdb-query-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.maxdb-real-query.html" class="function" rel="rdfs-seeAlso">maxdb_real_query()</a> - Execute an SQL query</span></li>
<li class="member"> <span class="function"><a href="function.maxdb-multi-query.html" class="function" rel="rdfs-seeAlso">maxdb_multi_query()</a> - Performs a query on the database</span></li>
<li class="member"> <span class="function"><a href="function.maxdb-free-result.html" class="function" rel="rdfs-seeAlso">maxdb_free_result()</a> - Frees the memory associated with a result</span></li>
</ul>
</p>
</div>
</div><hr /><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="function.maxdb-prepare.html">maxdb_prepare</a></div>
<div class="next" style="text-align: right; float: right;"><a href="function.maxdb-real-connect.html">maxdb_real_connect</a></div>
<div class="up"><a href="ref.maxdb.html">MaxDB Functions</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
