ctype_graph()函数检查除空格以外的所有可打印字符。如果字符串文本中的每个字符都是十进制数字,则返回TRUE,否则返回FALSE。
ctype_graph(str)
str- 测试的字符串。
如果文本中的每个字符都是可打印的,并且实际上创建了可见的输出(没有空格),则ctype_graph()函数返回TRUE,否则返回FALSE。
以下是一个例子-
<?php $arr = array('khy\n\r\t', 'arf12', 'LKA#@%.54'); foreach ($arr as $demo) { if (ctype_graph($demo)) { echo "$demo consists of all (visibly) printable characters \n"; } else { echo "$demo does not have all (visibly) printable characters. \n"; } } ?>
输出结果
khy\n\r\t consists of all (visibly) printable characters. arf12 consists of all (visibly) printable characters LKA#@%.54 consists of all (visibly) printable characters