<!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>Ctype Functions</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ctype.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.ctype-alnum.html">ctype_alnum</a></div> <div class="up"><a href="book.ctype.html">Ctype</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="ref.ctype" class="reference"> <h1 class="title">Ctype Functions</h1> <h2>Table of Contents</h2><ul class="chunklist chunklist_reference"><li><a href="function.ctype-alnum.html">ctype_alnum</a> — Check for alphanumeric character(s)</li><li><a href="function.ctype-alpha.html">ctype_alpha</a> — Check for alphabetic character(s)</li><li><a href="function.ctype-cntrl.html">ctype_cntrl</a> — Check for control character(s)</li><li><a href="function.ctype-digit.html">ctype_digit</a> — Check for numeric character(s)</li><li><a href="function.ctype-graph.html">ctype_graph</a> — Check for any printable character(s) except space</li><li><a href="function.ctype-lower.html">ctype_lower</a> — Check for lowercase character(s)</li><li><a href="function.ctype-print.html">ctype_print</a> — Check for printable character(s)</li><li><a href="function.ctype-punct.html">ctype_punct</a> — Check for any printable character which is not whitespace or an alphanumeric character</li><li><a href="function.ctype-space.html">ctype_space</a> — Check for whitespace character(s)</li><li><a href="function.ctype-upper.html">ctype_upper</a> — Check for uppercase character(s)</li><li><a href="function.ctype-xdigit.html">ctype_xdigit</a> — Check for character(s) representing a hexadecimal digit</li></ul> </div> <hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ctype.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.ctype-alnum.html">ctype_alnum</a></div> <div class="up"><a href="book.ctype.html">Ctype</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>
