<!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>Check if code point is a hexadecimal digit</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="intlchar.iswhitespace.html">IntlChar::isWhitespace</a></div> <div class="next" style="text-align: right; float: right;"><a href="intlchar.ord.html">IntlChar::ord</a></div> <div class="up"><a href="class.intlchar.html">IntlChar</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="intlchar.isxdigit" class="refentry"> <div class="refnamediv"> <h1 class="refname">IntlChar::isxdigit</h1> <p class="verinfo">(PHP 7)</p><p class="refpurpose"><span class="refname">IntlChar::isxdigit</span> — <span class="dc-title">Check if code point is a hexadecimal digit</span></p> </div> <div class="refsect1 description" id="refsect1-intlchar.isxdigit-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="modifier">static</span> <span class="type">bool</span> <span class="methodname"><strong>IntlChar::isxdigit</strong></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">$codepoint</code></span> )</div> <p class="para rdfs-comment"> Determines whether the specified code point is a hexadecimal digit. </p> <p class="para"> <strong><code>TRUE</code></strong> for characters with general category "Nd" (decimal digit numbers) as well as Latin letters a-f and A-F in both ASCII and Fullwidth ASCII. (That is, for letters with code points 0041..0046, 0061..0066, FF21..FF26, FF41..FF46.) </p> <p class="para"> This is equivalent to <em>IntlChar::digit($codepoint, 16) >= 0</em>. </p> </div> <div class="refsect1 parameters" id="refsect1-intlchar.isxdigit-parameters"> <h3 class="title">Parameters</h3> <dl> <dt> <code class="parameter">codepoint</code></dt> <dd> <p class="para">The <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span> codepoint value (e.g. <em>0x2603</em> for <em class="emphasis">U+2603 SNOWMAN</em>), or the character encoded as a UTF-8 <span class="type"><a href="language.types.string.html" class="type string">string</a></span> (e.g. <em>"\u{2603}"</em>)</p> </dd> </dl> </div> <div class="refsect1 returnvalues" id="refsect1-intlchar.isxdigit-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <strong><code>TRUE</code></strong> if <code class="parameter">codepoint</code> is a hexadecimal character, <strong><code>FALSE</code></strong> if not. </p> </div> <div class="refsect1 notes" id="refsect1-intlchar.isxdigit-notes"> <h3 class="title">Notes</h3> <blockquote class="note"><p><strong class="note">Note</strong>: <p class="para"> In order to narrow the definition of hexadecimal digits to only ASCII characters use: </p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$isASCIIHexadecimal </span><span style="color: #007700">= </span><span style="color: #0000BB">IntlChar</span><span style="color: #007700">::</span><span style="color: #0000BB">ord</span><span style="color: #007700">(</span><span style="color: #0000BB">$codepoint</span><span style="color: #007700">) <= </span><span style="color: #0000BB">0x7F </span><span style="color: #007700">&& </span><span style="color: #0000BB">IntlChar</span><span style="color: #007700">::</span><span style="color: #0000BB">isxdigit</span><span style="color: #007700">(</span><span style="color: #0000BB">$codepoint</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> </p></blockquote> </div> <div class="refsect1 examples" id="refsect1-intlchar.isxdigit-examples"> <h3 class="title">Examples</h3> <div class="example" id="example-3245"> <p><strong>Example #1 Testing different code points</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">IntlChar</span><span style="color: #007700">::</span><span style="color: #0000BB">isxdigit</span><span style="color: #007700">(</span><span style="color: #DD0000">"A"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">IntlChar</span><span style="color: #007700">::</span><span style="color: #0000BB">isxdigit</span><span style="color: #007700">(</span><span style="color: #DD0000">"1"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">IntlChar</span><span style="color: #007700">::</span><span style="color: #0000BB">isxdigit</span><span style="color: #007700">(</span><span style="color: #DD0000">"\u{2603}"</span><span style="color: #007700">));<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> bool(true) bool(true) bool(false) </pre></div> </div> </div> </div> <div class="refsect1 seealso" id="refsect1-intlchar.isxdigit-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><span class="function"><a href="intlchar.isdigit.html" class="function" rel="rdfs-seeAlso">IntlChar::isdigit()</a> - Check if code point is a digit character</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="intlchar.iswhitespace.html">IntlChar::isWhitespace</a></div> <div class="next" style="text-align: right; float: right;"><a href="intlchar.ord.html">IntlChar::ord</a></div> <div class="up"><a href="class.intlchar.html">IntlChar</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>