ctype_print
(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
ctype_print — 检测可打印字符
参数
返回值
如果在当前的语言环境下 text 里面的每个字符都能被实际输出(包括空白),那么就返回
true;如果 text 包含控制字符或者没有任何输出的字符,那么就返回
false。当使用空字符串调用时,结果始终为 false。
示例
示例 #1 ctype_print() 示例
<?php
$strings = array('string1' => "asdf\n\r\t", 'string2' => 'arf12', 'string3' => 'LKA#@%.54');
foreach ($strings as $name => $testcase) {
if (ctype_print($testcase)) {
echo "The string '$name' consists of all printable characters.\n";
} else {
echo "The string '$name' does not consist of all printable characters.\n";
}
}
?>以上示例会输出:
The string 'string1' does not consist of all printable characters. The string 'string2' consists of all printable characters. The string 'string3' consists of all printable characters.
参见
- ctype_cntrl() - 检测控制字符
- ctype_graph() - 检测除空格外的任何打印字符
- ctype_punct() - 检测可打印的字符是不是不包含空白、数字和字母
- IntlChar::isprint() - Check if code point is a printable character