ctype_print

(PHP 4 >= 4.0.4, PHP 5)

ctype_print — Check for printable character(s)

说明

bool ctype_print ( string $text )

Checks if all of the characters in the provided string, text, are printable.

参数

text: The tested string.

返回值

Returns TRUE if every character in text will actually create output (including blanks). Returns FALSE if text contains control characters or characters that do not have any output or control function at all.

范例

Example #1 A ctype_print() example


<?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";
    }
}
?>

以上例程会输出：

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.

注释

Note:
如果给出一个 -128 到 255 之间(含)的整数, 将会被解释为该值对应的ASCII字符 (负值将加上 256 以支持扩展ASCII字符). 其它整数将会被解释为该值对应的十进制字符串.

参见

ctype_cntrl() - Check for control character(s)
ctype_graph() - Check for any printable character(s) except space
ctype_punct() - Check for any printable character which is not whitespace or an alphanumeric character

ctype_print

说明

参数

返回值

范例

注释

参见

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