ctype_xdigit

(PHP 4 >= 4.0.4, PHP 5)

ctype_xdigit — Check for character(s) representing a hexadecimal digit

说明

bool ctype_xdigit ( string $text )

Checks if all of the characters in the provided string, text , are hexadecimal 'digits'.

参数

text: The tested string.

返回值

Returns TRUE if every character in text is a hexadecimal 'digit', that is a decimal digit or a character from [A-Fa-f] , FALSE otherwise.

范例

Example#1 A ctype_xdigit() example


<?php
$strings = array('AB10BC99', 'AR1012', 'ab12bc99');
foreach ($strings as $testcase) {
    if (ctype_xdigit($testcase)) {
        echo "The string $testcase consists of all hexadecimal digits.\n";
    } else {
        echo "The string $testcase does not consist of all hexadecimal digits.\n";
    }
}
?>

上例将输出：

The string AB10BC99 consists of all hexadecimal digits.
The string AR1012 does not consist of all hexadecimal digits.
The string ab12bc99 consists of all hexadecimal digits.

参见

ctype_digit()


	PHP5中文手册 ctype CURL ctype PHP Manual ctype_xdigit (PHP 4 >= 4.0.4, PHP 5) ctype_xdigit — Check for character(s) representing a hexadecimal digit 说明 bool ctype_xdigit ( string `$text` ) Checks if all of the characters in the provided string, `text` , are hexadecimal 'digits'. 参数 `text` The tested string. 返回值 Returns `TRUE` if every character in `text` is a hexadecimal 'digit', that is a decimal digit or a character from [A-Fa-f] , `FALSE` otherwise. 范例 Example#1 A ctype_xdigit() example `<?php $strings = array('AB10BC99', 'AR1012', 'ab12bc99'); foreach ($strings as $testcase) { if (ctype_xdigit($testcase)) { echo "The string $testcase consists of all hexadecimal digits.\n"; } else { echo "The string $testcase does not consist of all hexadecimal digits.\n"; } } ?>` 上例将输出： The string AB10BC99 consists of all hexadecimal digits. The string AR1012 does not consist of all hexadecimal digits. The string ab12bc99 consists of all hexadecimal digits. 参见 ctype_digit() ctype CURL ctype PHP Manual