Source of: /manual/en/function.mysql-field-len.php
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<div id="function.mysql-field-len" class="refentry">
<div class="refnamediv">
<h1 class="refname">mysql_field_len</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">mysql_field_len</span> — <span class="dc-title">Returns the length of the specified field</span></p>
</div>
<a name="function.mysql-field-len.description"></a><div class="refsect1 description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">int</span> <span class="methodname"><b>mysql_field_len</b></span>
( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$result</tt></span>
, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$field_offset</tt></span>
)</div>
<p class="para rdfs-comment">
<b>mysql_field_len()</b> returns the length of the
specified field.
</p>
</div>
<a name="function.mysql-field-len.parameters"></a><div class="refsect1 parameters">
<h3 class="title">Parameters</h3>
<p class="para">
</p><dl>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">
result</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">The result <a href="language.types.resource.php" class="type resource">resource</a> that
is being evaluated. This result comes from a call to
<a href="function.mysql-query.php" class="function">mysql_query()</a>.</p></dd>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">
field_offset</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">The numerical field offset. The
<i><tt class="parameter">field_offset</tt></i>
starts at <i>0</i>. If
<i><tt class="parameter">field_offset</tt></i>
does not exist, an error of level
<b><tt class="constant">E_WARNING</tt></b> is also issued.</p></dd>
</dl>
<p>
</p>
</div>
<a name="function.mysql-field-len.returnvalues"></a><div class="refsect1 returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
The length of the specified field index on success or <b><tt class="constant">FALSE</tt></b> on failure.
</p>
</div>
<a name="function.mysql-field-len.examples"></a><div class="refsect1 examples">
<h3 class="title">Examples</h3>
<p class="para">
</p><div class="example">
<p><b>Example #1 <b>mysql_field_len()</b> example</b></p>
<div class="example-contents programlisting">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$result </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT id,email FROM people WHERE id = '42'"</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">'Could not run query: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">();<br /> exit;<br />}<br /><br /></span><span style="color: #FF8000">// Will get the length of the id field as specified in the database<br />// schema. <br /></span><span style="color: #0000BB">$length </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_field_len</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$length</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div><p>
</p>
</div>
<a name="function.mysql-field-len.notes"></a><div class="refsect1 notes">
<h3 class="title">Notes</h3>
<blockquote><p><b class="note">Note</b>:
For backward compatibility, the following
deprecated alias may be used:
<b>mysql_fieldlen()</b>
<br />
</p></blockquote>
</div>
<a name="function.mysql-field-len.seealso"></a><div class="refsect1 seealso">
<h3 class="title">See Also</h3>
<p class="para">
</p><ul class="simplelist">
<li class="member"><a href="function.mysql-fetch-lengths.php" class="function" rel="rdfs-seeAlso">mysql_fetch_lengths()</a> - Get the length of each output in a result</li>
<li class="member"><a href="function.strlen.php" class="function" rel="rdfs-seeAlso">strlen()</a> - Get string length</li>
</ul><p>
</p>
</div>
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