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<title>Checks if a field in the currently fetched row is NULL</title>
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<h1 class="refname">oci_field_is_null</h1>
<p class="verinfo">(PHP 5, PHP 7, PECL OCI8 >= 1.1.0)</p><p class="refpurpose"><span class="refname">oci_field_is_null</span> — <span class="dc-title">Checks if a field in the currently fetched row is <strong><code>NULL</code></strong></span></p>
</div>
<div class="refsect1 description" id="refsect1-function.oci-field-is-null-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>oci_field_is_null</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$statement</code></span>
, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$field</code></span>
)</div>
<p class="para rdfs-comment">
Checks if the given <code class="parameter">field</code> from the current row of
<code class="parameter">statement</code> is <strong><code>NULL</code></strong>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.oci-field-is-null-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">statement</code></dt>
<dd>
<p class="para">
A valid OCI statement identifier.
</p>
</dd>
<dt>
<code class="parameter">field</code></dt>
<dd>
<p class="para">
Can be the field's index (1-based) or name.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.oci-field-is-null-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> if <code class="parameter">field</code> is <strong><code>NULL</code></strong>, <strong><code>FALSE</code></strong> otherwise.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.oci-field-is-null-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-2482">
<p><strong>Example #1 <span class="function"><a href="function.oci-field-name.html" class="function">oci_field_name()</a></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><br /></span><span style="color: #FF8000">// Create the table with:<br />// CREATE TABLE mytab (c1 NUMBER);<br />// INSERT INTO mytab VALUES (1);<br />// INSERT INTO mytab VALUES (NULL);<br /><br /></span><span style="color: #0000BB">$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"hr"</span><span style="color: #007700">, </span><span style="color: #DD0000">"hrpwd"</span><span style="color: #007700">, </span><span style="color: #DD0000">"localhost/XE"</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$conn</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$m </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_error</span><span style="color: #007700">();<br /> </span><span style="color: #0000BB">trigger_error</span><span style="color: #007700">(</span><span style="color: #0000BB">htmlentities</span><span style="color: #007700">(</span><span style="color: #0000BB">$m</span><span style="color: #007700">[</span><span style="color: #DD0000">'message'</span><span style="color: #007700">]), </span><span style="color: #0000BB">E_USER_ERROR</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #0000BB">$stid </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_parse</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"SELECT * FROM mytab"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">oci_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">);<br /><br />while ((</span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_fetch_array</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">, </span><span style="color: #0000BB">OCI_RETURN_NULLS</span><span style="color: #007700">)) != </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$ncols </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_num_fields</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">);<br /> for (</span><span style="color: #0000BB">$col </span><span style="color: #007700">= </span><span style="color: #0000BB">1</span><span style="color: #007700">; </span><span style="color: #0000BB">$col </span><span style="color: #007700"><= </span><span style="color: #0000BB">$ncols</span><span style="color: #007700">; </span><span style="color: #0000BB">$col</span><span style="color: #007700">++) {<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">oci_field_is_null</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">, </span><span style="color: #0000BB">$col</span><span style="color: #007700">));<br /> } <br />}<br /><br /></span><span style="color: #FF8000">// Outputs:<br />// bool(false)<br />// bool(true)<br /><br /></span><span style="color: #0000BB">oci_free_statement</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">oci_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 notes" id="refsect1-function.oci-field-is-null-notes">
<h3 class="title">Notes</h3>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
In PHP versions before 5.0.0 you must use <span class="function"><a href="function.ocicolumnisnull.html" class="function">ocicolumnisnull()</a></span> instead.
This name still can be used, it was left as alias of
<span class="function"><strong>oci_field_is_null()</strong></span> for downwards compatability.
This, however, is deprecated and not recommended.
</p>
</p></blockquote>
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