您的位置:寻梦网首页编程乐园PHP 编程PHP5中文手册
PHP5中文手册

ctype_graph

(PHP 4 >= 4.0.4, PHP 5)

ctype_graph — Check for any printable character(s) except space

说明

bool ctype_graph ( string $text )

Checks if all of the characters in the provided string, text , creates visible output.

参数

text

The tested string.

返回值

Returns TRUE if every character in text is printable and actually creates visible output (no white space), FALSE otherwise.

范例

Example#1 A ctype_graph() example

<?php
$strings 
= array('string1' => "asdf\n\r\t"'string2' => 'arf12''string3' => 'LKA#@%.54');
foreach (
$strings as $name => $testcase) {
    if (
ctype_graph($testcase)) {
        echo 
"The string '$name' consists of all (visibly) printable characters.\n";
    } else {
        echo 
"The string '$name' does not consist of all (visibly) printable characters.\n";
    }
}
?>

上例将输出:

The string 'string1' does not consist of all (visibly) printable characters.
The string 'string2' consists of all (visibly) printable characters.
The string 'string3' consists of all (visibly) printable characters.