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<title>Give the bounding box of a text using TrueType fonts</title>
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<div class="refnamediv">
<h1 class="refname">imagettfbbox</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">imagettfbbox</span> — <span class="dc-title">Give the bounding box of a text using TrueType fonts</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.imagettfbbox-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">array</span> <span class="methodname"><strong>imagettfbbox</strong></span>
( <span class="methodparam"><span class="type">float</span> <code class="parameter">$size</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$angle</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$fontfile</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$text</code></span>
)</div>
<p class="para rdfs-comment">
This function calculates and returns the bounding box in pixels
for a TrueType text.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.imagettfbbox-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">size</code></em></span>
<dd>
<p class="para">
The font size.
<blockquote class="note"><p><strong class="note">Note</strong>:
<span class="simpara">
In GD 1, this is measured in pixels. In GD 2, this is measured in
points.
</span>
</p></blockquote>
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">angle</code></em></span>
<dd>
<p class="para">
Angle in degrees in which <em><code class="parameter">text</code></em> will be measured.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">fontfile</code></em></span>
<dd>
<p class="para">
The name of the TrueType font file (can be a URL). Depending on
which version of the GD library that PHP is using, it may attempt to
search for files that do not begin with a leading '/' by appending
'.ttf' to the filename and searching along a library-defined font path.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">text</code></em></span>
<dd>
<p class="para">
The string to be measured.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.imagettfbbox-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
<span class="function"><strong>imagettfbbox()</strong></span> returns an array with 8
elements representing four points making the bounding box of the
text on success and <strong><code>FALSE</code></strong> on error.
<table class="doctable informaltable">
<thead>
<tr>
<th>key</th>
<th>contents</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>0</td>
<td>lower left corner, X position</td>
</tr>
<tr>
<td>1</td>
<td>lower left corner, Y position</td>
</tr>
<tr>
<td>2</td>
<td>lower right corner, X position</td>
</tr>
<tr>
<td>3</td>
<td>lower right corner, Y position</td>
</tr>
<tr>
<td>4</td>
<td>upper right corner, X position</td>
</tr>
<tr>
<td>5</td>
<td>upper right corner, Y position</td>
</tr>
<tr>
<td>6</td>
<td>upper left corner, X position</td>
</tr>
<tr>
<td>7</td>
<td>upper left corner, Y position</td>
</tr>
</tbody>
</table>
</p>
<p class="para">
The points are relative to the <em class="emphasis">text</em> regardless of the
<em><code class="parameter">angle</code></em>, so "upper left" means in the top left-hand
corner seeing the text horizontally.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.imagettfbbox-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3285">
<p><strong>Example #1 <span class="function"><strong>imagettfbbox()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Create a 300x150 image<br /></span><span style="color: #0000BB">$im </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatetruecolor</span><span style="color: #007700">(</span><span style="color: #0000BB">300</span><span style="color: #007700">, </span><span style="color: #0000BB">150</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$black </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$white </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Set the background to be white<br /></span><span style="color: #0000BB">imagefilledrectangle</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">299</span><span style="color: #007700">, </span><span style="color: #0000BB">299</span><span style="color: #007700">, </span><span style="color: #0000BB">$white</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Path to our font file<br /></span><span style="color: #0000BB">$font </span><span style="color: #007700">= </span><span style="color: #DD0000">'./arial.ttf'</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// First we create our bounding box for the first text<br /></span><span style="color: #0000BB">$bbox </span><span style="color: #007700">= </span><span style="color: #0000BB">imagettfbbox</span><span style="color: #007700">(</span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">45</span><span style="color: #007700">, </span><span style="color: #0000BB">$font</span><span style="color: #007700">, </span><span style="color: #DD0000">'Powered by PHP ' </span><span style="color: #007700">. </span><span style="color: #0000BB">phpversion</span><span style="color: #007700">());<br /><br /></span><span style="color: #FF8000">// This is our cordinates for X and Y<br /></span><span style="color: #0000BB">$x </span><span style="color: #007700">= </span><span style="color: #0000BB">$bbox</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">] + (</span><span style="color: #0000BB">imagesx</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">) / </span><span style="color: #0000BB">2</span><span style="color: #007700">) - (</span><span style="color: #0000BB">$bbox</span><span style="color: #007700">[</span><span style="color: #0000BB">4</span><span style="color: #007700">] / </span><span style="color: #0000BB">2</span><span style="color: #007700">) - </span><span style="color: #0000BB">25</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$y </span><span style="color: #007700">= </span><span style="color: #0000BB">$bbox</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">] + (</span><span style="color: #0000BB">imagesy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">) / </span><span style="color: #0000BB">2</span><span style="color: #007700">) - (</span><span style="color: #0000BB">$bbox</span><span style="color: #007700">[</span><span style="color: #0000BB">5</span><span style="color: #007700">] / </span><span style="color: #0000BB">2</span><span style="color: #007700">) - </span><span style="color: #0000BB">5</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Write it<br /></span><span style="color: #0000BB">imagettftext</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">45</span><span style="color: #007700">, </span><span style="color: #0000BB">$x</span><span style="color: #007700">, </span><span style="color: #0000BB">$y</span><span style="color: #007700">, </span><span style="color: #0000BB">$black</span><span style="color: #007700">, </span><span style="color: #0000BB">$font</span><span style="color: #007700">, </span><span style="color: #DD0000">'Powered by PHP ' </span><span style="color: #007700">. </span><span style="color: #0000BB">phpversion</span><span style="color: #007700">());<br /><br /></span><span style="color: #FF8000">// Create the next bounding box for the second text<br /></span><span style="color: #0000BB">$bbox </span><span style="color: #007700">= </span><span style="color: #0000BB">imagettfbbox</span><span style="color: #007700">(</span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">45</span><span style="color: #007700">, </span><span style="color: #0000BB">$font</span><span style="color: #007700">, </span><span style="color: #DD0000">'and Zend Engine ' </span><span style="color: #007700">. </span><span style="color: #0000BB">zend_version</span><span style="color: #007700">());<br /><br /></span><span style="color: #FF8000">// Set the cordinates so its next to the first text<br /></span><span style="color: #0000BB">$x </span><span style="color: #007700">= </span><span style="color: #0000BB">$bbox</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">] + (</span><span style="color: #0000BB">imagesx</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">) / </span><span style="color: #0000BB">2</span><span style="color: #007700">) - (</span><span style="color: #0000BB">$bbox</span><span style="color: #007700">[</span><span style="color: #0000BB">4</span><span style="color: #007700">] / </span><span style="color: #0000BB">2</span><span style="color: #007700">) + </span><span style="color: #0000BB">10</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$y </span><span style="color: #007700">= </span><span style="color: #0000BB">$bbox</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">] + (</span><span style="color: #0000BB">imagesy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">) / </span><span style="color: #0000BB">2</span><span style="color: #007700">) - (</span><span style="color: #0000BB">$bbox</span><span style="color: #007700">[</span><span style="color: #0000BB">5</span><span style="color: #007700">] / </span><span style="color: #0000BB">2</span><span style="color: #007700">) - </span><span style="color: #0000BB">5</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Write it<br /></span><span style="color: #0000BB">imagettftext</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">45</span><span style="color: #007700">, </span><span style="color: #0000BB">$x</span><span style="color: #007700">, </span><span style="color: #0000BB">$y</span><span style="color: #007700">, </span><span style="color: #0000BB">$black</span><span style="color: #007700">, </span><span style="color: #0000BB">$font</span><span style="color: #007700">, </span><span style="color: #DD0000">'and Zend Engine ' </span><span style="color: #007700">. </span><span style="color: #0000BB">zend_version</span><span style="color: #007700">());<br /><br /></span><span style="color: #FF8000">// Output to browser<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">'Content-Type: image/png'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">imagepng</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 notes" id="refsect1-function.imagettfbbox-notes">
<h3 class="title">Notes</h3>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
This function requires both the GD library and the <a href="http://www.freetype.org/" class="link external">» FreeType</a> library.
</p>
</p></blockquote>
</div>
<div class="refsect1 seealso" id="refsect1-function.imagettfbbox-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.imagettftext.html" class="function" rel="rdfs-seeAlso">imagettftext()</a> - Write text to the image using TrueType fonts</span></li>
</ul>
</p>
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