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<title>Gets an array of names for all collections in this database</title>
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<h1 class="refname">MongoDB::getCollectionNames</h1>
<p class="verinfo">(PECL mongo >=1.3.0)</p><p class="refpurpose"><span class="refname">MongoDB::getCollectionNames</span> — <span class="dc-title">Gets an array of names for all collections in this database</span></p>
</div>
<div class="refsect1 description" id="refsect1-mongodb.getcollectionnames-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="type">array</span> <span class="methodname"><strong>MongoDB::getCollectionNames</strong></span>
([ <span class="methodparam"><span class="type">array</span> <code class="parameter">$options</code><span class="initializer"> = array()</span></span>
] )</div>
<p class="para rdfs-comment">
Gets a list of all collections in the database and returns their names as an
array of strings.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">This method will use the <a href="https://docs.mongodb.com/manual/reference/command/listCollections" class="link external">» listCollections</a> database command when communicating with MongoDB 2.8+. For previous database versions, the method will query the special <em>system.namespaces</em> collection.</span></p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-mongodb.getcollectionnames-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<code class="parameter">options</code>
</dt>
<dd>
<p class="para">
An array of options for listing the collections. Currently available
options include:
<ul class="itemizedlist">
<li class="listitem"><p class="para"><em>"filter"</em></p><p class="para">Optional query criteria. If provided, this criteria will be used to filter the collections included in the result.</p><p class="para">Relevant fields that may be queried include <em>"name"</em> (collection name as a string, without the database name prefix) and <em>"options" (object containing options used to create the collection).</em>.</p><blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">MongoDB 2.6 and earlier versions require the <em>"name"</em> criteria, if specified, to be a string value (i.e. equality match). This is because the driver must prefix the value with the database name in order to query the <em>system.namespaces</em> collection. Later versions of MongoDB do not have this limitation, as the driver will use the listCollections command.</span></p></blockquote></li>
<li class="listitem"><p class="para"><em>"includeSystemCollections"</em></p><p class="para">Boolean, defaults to <strong><code>FALSE</code></strong>. Determines whether system collections should be included in the result.</p></li>
</ul>
</p>
<p class="para">
The following option may be used with MongoDB 2.8+:
<ul class="itemizedlist">
<li class="listitem"><p class="para"><em>"maxTimeMS"</em></p><p class="para">Specifies a cumulative time limit in milliseconds for processing the operation on the server (does not include idle time). If the operation is not completed by the server within the timeout period, a <a href="class.mongoexecutiontimeoutexception.html" class="classname">MongoExecutionTimeoutException</a> will be thrown.</p></li>
</ul>
</p>
</dd>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-mongodb.getcollectionnames-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the collection names as an array of strings.
</p>
</div>
<div class="refsect1 errors" id="refsect1-mongodb.getcollectionnames-errors">
<h3 class="title">Errors/Exceptions</h3>
<p class="para">
For MongoDB 2.6 and earlier, <a href="class.mongoexception.html" class="classname">MongoException</a> will be
thrown if a non-string value was specified for the
<em>"filter"</em> option's <em>"name"</em> criteria.
</p>
</div>
<div class="refsect1 changelog" id="refsect1-mongodb.getcollectionnames-changelog">
<h3 class="title">Changelog</h3>
<table class="doctable informaltable">
<thead>
<tr>
<th>Version</th>
<th>Description</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>1.6.0</td>
<td>
Changed first parameter to be an array of options. Pre-1.6.0, the
first parameter was a boolean indicating the
<em>"includeSystemCollections"</em> option.
</td>
</tr>
</tbody>
</table>
</div>
<div class="refsect1 examples" id="refsect1-mongodb.getcollectionnames-examples">
<h3 class="title">Examples</h3>
<div class="example" id="example-1552">
<p><strong>Example #1 <span class="function"><strong>MongoDB::getCollectionNames()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$m </span><span style="color: #007700">= new </span><span style="color: #0000BB">MongoClient</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$db </span><span style="color: #007700">= </span><span style="color: #0000BB">$m</span><span style="color: #007700">-></span><span style="color: #0000BB">selectDB</span><span style="color: #007700">(</span><span style="color: #DD0000">"demo"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$collections </span><span style="color: #007700">= </span><span style="color: #0000BB">$db</span><span style="color: #007700">-></span><span style="color: #0000BB">getCollectionNames</span><span style="color: #007700">();<br /><br />foreach (</span><span style="color: #0000BB">$collections </span><span style="color: #007700">as </span><span style="color: #0000BB">$collectionName</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"Found collection: "</span><span style="color: #007700">, </span><span style="color: #0000BB">$collectionName</span><span style="color: #007700">, </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output
something similar to:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
...
Found collection: img
Found collection: beer
Found collection: collation
...
</pre></div>
</div>
</div>
</div>
<div class="refsect1 seealso" id="refsect1-mongodb.getcollectionnames-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"><span class="function"><a href="mongodb.listcollections.html" class="function" rel="rdfs-seeAlso">MongoDB::listCollections()</a> - Gets an array of MongoCollection objects for all collections in this database</span></li>
<li class="member"><span class="function"><a href="mongodb.getcollectioninfo.html" class="function" rel="rdfs-seeAlso">MongoDB::getCollectionInfo()</a> - Returns information about collections in this database</span></li>
</ul>
</p>
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