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<title>Strip whitespace (or other characters) from the end of a string</title>
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<div class="refnamediv">
<h1 class="refname">rtrim</h1>
<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">rtrim</span> — <span class="dc-title">Strip whitespace (or other characters) from the end of a string</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.rtrim-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>rtrim</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str</code></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$character_mask</code></span>
] )</div>
<p class="para rdfs-comment">
This function returns a string with whitespace (or other characters) stripped from the
end of <code class="parameter">str</code>.
</p>
<p class="para">
Without the second parameter,
<span class="function"><strong>rtrim()</strong></span> will strip these characters:
<ul class="itemizedlist">
<li class="listitem">
<span class="simpara">
" " (<acronym title="American Standard Code for Information Interchange">ASCII</acronym> <em>32</em>
(<em>0x20</em>)), an ordinary space.
</span>
</li>
<li class="listitem">
<span class="simpara">
"\t" (<acronym title="American Standard Code for Information Interchange">ASCII</acronym> <em>9</em>
(<em>0x09</em>)), a tab.
</span>
</li>
<li class="listitem">
<span class="simpara">
"\n" (<acronym title="American Standard Code for Information Interchange">ASCII</acronym> <em>10</em>
(<em>0x0A</em>)), a new line (line feed).
</span>
</li>
<li class="listitem">
<span class="simpara">
"\r" (<acronym title="American Standard Code for Information Interchange">ASCII</acronym> <em>13</em>
(<em>0x0D</em>)), a carriage return.
</span>
</li>
<li class="listitem">
<span class="simpara">
"\0" (<acronym title="American Standard Code for Information Interchange">ASCII</acronym> <em>0</em>
(<em>0x00</em>)), the <em>NULL</em>-byte.
</span>
</li>
<li class="listitem">
<span class="simpara">
"\x0B" (<acronym title="American Standard Code for Information Interchange">ASCII</acronym> <em>11</em>
(<em>0x0B</em>)), a vertical tab.
</span>
</li>
</ul>
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.rtrim-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">str</code></dt>
<dd>
<p class="para">
The input string.
</p>
</dd>
<dt>
<code class="parameter">character_mask</code></dt>
<dd>
<p class="para">
You can also specify the characters you want to strip, by means
of the <code class="parameter">character_mask</code> parameter.
Simply list all characters that you want to be stripped. With
<em>..</em> you can specify a range of characters.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.rtrim-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the modified string.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.rtrim-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-6063">
<p><strong>Example #1 Usage example of <span class="function"><strong>rtrim()</strong></span></strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><br />$text </span><span style="color: #007700">= </span><span style="color: #DD0000">"\t\tThese are a few words :) ... "</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$binary </span><span style="color: #007700">= </span><span style="color: #DD0000">"\x09Example string\x0A"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$hello </span><span style="color: #007700">= </span><span style="color: #DD0000">"Hello World"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$text</span><span style="color: #007700">, </span><span style="color: #0000BB">$binary</span><span style="color: #007700">, </span><span style="color: #0000BB">$hello</span><span style="color: #007700">);<br /><br />print </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$trimmed </span><span style="color: #007700">= </span><span style="color: #0000BB">rtrim</span><span style="color: #007700">(</span><span style="color: #0000BB">$text</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$trimmed</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$trimmed </span><span style="color: #007700">= </span><span style="color: #0000BB">rtrim</span><span style="color: #007700">(</span><span style="color: #0000BB">$text</span><span style="color: #007700">, </span><span style="color: #DD0000">" \t."</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$trimmed</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$trimmed </span><span style="color: #007700">= </span><span style="color: #0000BB">rtrim</span><span style="color: #007700">(</span><span style="color: #0000BB">$hello</span><span style="color: #007700">, </span><span style="color: #DD0000">"Hdle"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$trimmed</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// trim the ASCII control characters at the end of $binary<br />// (from 0 to 31 inclusive)<br /></span><span style="color: #0000BB">$clean </span><span style="color: #007700">= </span><span style="color: #0000BB">rtrim</span><span style="color: #007700">(</span><span style="color: #0000BB">$binary</span><span style="color: #007700">, </span><span style="color: #DD0000">"\x00..\x1F"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$clean</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:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
string(32) " These are a few words :) ... "
string(16) " Example string
"
string(11) "Hello World"
string(30) " These are a few words :) ..."
string(26) " These are a few words :)"
string(9) "Hello Wor"
string(15) " Example string"
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.rtrim-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"><span class="function"><a href="function.trim.html" class="function" rel="rdfs-seeAlso">trim()</a> - Strip whitespace (or other characters) from the beginning and end of a string</span></li>
<li class="member"><span class="function"><a href="function.ltrim.html" class="function" rel="rdfs-seeAlso">ltrim()</a> - Strip whitespace (or other characters) from the beginning of a string</span></li>
</ul>
</p>
</div>
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