ctype_alnum

(PHP 4 >= 4.0.4, PHP 5)

ctype_alnum — Check for alphanumeric character(s)

说明

bool ctype_alnum ( string $text )

Checks if all of the characters in the provided string, text , are alphanumeric. In the standard C locale letters are just [A-Za-z].

参数

text: The tested string.

返回值

Returns TRUE if every character in text is either a letter or a digit, FALSE otherwise.

范例

Example#1 A ctype_alnum() example (using the default locale)


<?php
$strings = array('AbCd1zyZ9', 'foo!#$bar');
foreach ($strings as $testcase) {
    if (ctype_alnum($testcase)) {
        echo "The string $testcase consists of all letters or digits.\n";
    } else {
        echo "The string $testcase does not consist of all letters or digits.\n";
    }
}
?>

上例将输出：

The string AbCd1zyZ9 consists of all letters or digits.
The string foo!#$bar does not consist of all letters or digits.

参见

ctype_alpha()
ctype_digit()
setlocale()


	PHP5中文手册 ctype ctype_alpha ctype PHP Manual ctype_alnum (PHP 4 >= 4.0.4, PHP 5) ctype_alnum — Check for alphanumeric character(s) 说明 bool ctype_alnum ( string `$text` ) Checks if all of the characters in the provided string, `text` , are alphanumeric. In the standard C locale letters are just [A-Za-z]. 参数 `text` The tested string. 返回值 Returns `TRUE` if every character in `text` is either a letter or a digit, `FALSE` otherwise. 范例 Example#1 A ctype_alnum() example (using the default locale) `<?php $strings = array('AbCd1zyZ9', 'foo!#$bar'); foreach ($strings as $testcase) { if (ctype_alnum($testcase)) { echo "The string $testcase consists of all letters or digits.\n"; } else { echo "The string $testcase does not consist of all letters or digits.\n"; } } ?>` 上例将输出： The string AbCd1zyZ9 consists of all letters or digits. The string foo!#$bar does not consist of all letters or digits. 参见 ctype_alpha() ctype_digit() setlocale() ctype ctype_alpha ctype PHP Manual