phpstudy所有软件,已经通过360安全检测认证,phpstudy linux web面板(docker),已发布安全检测与修复

ctype_cntrl

ctype_cntrl

(PHP 4 >= 4.0.4, PHP 5)

ctype_cntrlCheck for control character(s)

说明

bool ctype_cntrl ( string $text )

Checks if all of the characters in the provided string, text, are control characters. Control characters are e.g. line feed, tab, escape.

参数

text

The tested string.

返回值

Returns TRUE if every character in text is a control character from the current locale, FALSE otherwise.

范例

Example #1 A ctype_cntrl() example

<?php
$strings 
= array('string1' => " "'string2' => 'arf12');
foreach (
$strings as $name => $testcase) {
    if (
ctype_cntrl($testcase)) {
        echo 
"The string '$name' consists of all control characters. ";
    } else {
        echo 
"The string '$name' does not consist of all control characters. ";
    }
}
?>

以上例程会输出:

The string 'string1' consists of all control characters.
The string 'string2' does not consist of all control characters.

注释

Note:

If an integer between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative values have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string containing the decimal digits of the integer.

参见


  • ctype_alnum
  • ctype_alpha
  • ctype_cntrl
  • ctype_digit
  • ctype_graph
  • ctype_lower
  • ctype_print
  • ctype_punct
  • ctype_space
  • ctype_upper
  • ctype_xdigit
  • PHP MySQL HTML CSS JavaScript MSSQL AJAX .NET JSP Linux Mac ASP 服务器 SQL jQuery C# C++ java Android IOS oracle MongoDB SQLite wamp 交通频道

    无数据提示还没有评论,楼主喊你快去抢前排~~~我要评论
    微信扫码登陆

    打开 微信
    扫一扫登录