<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Make a string uppercase</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.strtolower.html">strtolower</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.strtr.html">strtr</a></div> <div class="up"><a href="ref.strings.html">String Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.strtoupper" class="refentry"> <div class="refnamediv"> <h1 class="refname">strtoupper</h1> <p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">strtoupper</span> — <span class="dc-title">Make a string uppercase</span></p> </div> <div class="refsect1 description" id="refsect1-function.strtoupper-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">string</span> <span class="methodname"><strong>strtoupper</strong></span> ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$string</code></span> )</div> <p class="para rdfs-comment"> Returns <code class="parameter">string</code> with all alphabetic characters converted to uppercase. </p> <p class="para"> Note that 'alphabetic' is determined by the current locale. For instance, in the default "C" locale characters such as umlaut-a (รค) will not be converted. </p> </div> <div class="refsect1 parameters" id="refsect1-function.strtoupper-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <code class="parameter">string</code></dt> <dd> <p class="para"> The input string. </p> </dd> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.strtoupper-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the uppercased string. </p> </div> <div class="refsect1 examples" id="refsect1-function.strtoupper-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-6117"> <p><strong>Example #1 <span class="function"><strong>strtoupper()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">"Mary Had A Little Lamb and She LOVED It So"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$str </span><span style="color: #007700">= </span><span style="color: #0000BB">strtoupper</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$str</span><span style="color: #007700">; </span><span style="color: #FF8000">// Prints MARY HAD A LITTLE LAMB AND SHE LOVED IT SO<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> </div> </p> </div> <div class="refsect1 notes" id="refsect1-function.strtoupper-notes"> <h3 class="title">Notes</h3> <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">This function is binary-safe.</span></p></blockquote> </div> <div class="refsect1 seealso" id="refsect1-function.strtoupper-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><span class="function"><a href="function.strtolower.html" class="function" rel="rdfs-seeAlso">strtolower()</a> - Make a string lowercase</span></li> <li class="member"><span class="function"><a href="function.ucfirst.html" class="function" rel="rdfs-seeAlso">ucfirst()</a> - Make a string's first character uppercase</span></li> <li class="member"><span class="function"><a href="function.ucwords.html" class="function" rel="rdfs-seeAlso">ucwords()</a> - Uppercase the first character of each word in a string</span></li> <li class="member"><span class="function"><a href="function.mb-strtoupper.html" class="function" rel="rdfs-seeAlso">mb_strtoupper()</a> - Make a string uppercase</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.strtolower.html">strtolower</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.strtr.html">strtr</a></div> <div class="up"><a href="ref.strings.html">String Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>