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<title>Setting Criteria for a Query</title>
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<h2 class="title">Setting Criteria for a Query</h2>
<p class="para">
We can create a query to pass to the
<span class="function"><a href="mongocollection.find.html" class="function">MongoCollection::find()</a></span> method to get a subset of the
documents in our collection. For example, if we wanted to find the document
for which the value of the <em>"i"</em> field is
<em>71</em>, we would do the following:
</p>
<div class="example" id="mongo.tutorial.criteria-example">
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$connection </span><span style="color: #007700">= new </span><span style="color: #0000BB">MongoClient</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$collection </span><span style="color: #007700">= </span><span style="color: #0000BB">$connection</span><span style="color: #007700">-></span><span style="color: #0000BB">database</span><span style="color: #007700">-></span><span style="color: #0000BB">collectionName</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$query </span><span style="color: #007700">= array( </span><span style="color: #DD0000">'i' </span><span style="color: #007700">=> </span><span style="color: #0000BB">71 </span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$cursor </span><span style="color: #007700">= </span><span style="color: #0000BB">$collection</span><span style="color: #007700">-></span><span style="color: #0000BB">find</span><span style="color: #007700">( </span><span style="color: #0000BB">$query </span><span style="color: #007700">);<br /><br />while ( </span><span style="color: #0000BB">$cursor</span><span style="color: #007700">-></span><span style="color: #0000BB">hasNext</span><span style="color: #007700">() )<br />{<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">( </span><span style="color: #0000BB">$cursor</span><span style="color: #007700">-></span><span style="color: #0000BB">getNext</span><span style="color: #007700">() );<br />}<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
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<div class="example-contents"><p>The above example will output:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
array(2) {
["_id"]=>
object(MongoId)#6 (0) {
}
["i"]=>
int(71)
["_ns"]=>
"testCollection"
}
</pre></div>
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