PHP5中文手册·Check for alphabetic character(s) -- 追寻梦想＞编程乐园＞PHP 编程

说明

bool ctype_alpha ( string $text )

Checks if all of the characters in the provided string, text , are alphabetic. In the standard C locale letters are just [A-Za-z] and ctype_alpha() is equivalent to (ctype_upper($text) || ctype_lower($text)) if $text is just a single character, but other languages have letters that are considered neither upper nor lower case.

参数

text: The tested string.

返回值

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

范例

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


<?php
$strings = array('KjgWZC', 'arf12');
foreach ($strings as $testcase) {
    if (ctype_alpha($testcase)) {
        echo "The string $testcase consists of all letters.\n";
    } else {
        echo "The string $testcase does not consist of all letters.\n";
    }
}
?>

上例将输出：

The string KjgWZC consists of all letters.
The string arf12 does not consist of all letters.


	PHP5中文手册 ctype_alnum ctype_cntrl ctype PHP Manual ctype_alpha (PHP 4 >= 4.0.4, PHP 5) ctype_alpha — Check for alphabetic character(s) 说明 bool ctype_alpha ( string `$text` ) Checks if all of the characters in the provided string, `text` , are alphabetic. In the standard C locale letters are just [A-Za-z] and ctype_alpha() is equivalent to (ctype_upper($text) \|\| ctype_lower($text)) if $text is just a single character, but other languages have letters that are considered neither upper nor lower case. 参数 `text` The tested string. 返回值 Returns `TRUE` if every character in `text` is a letter from the current locale, `FALSE` otherwise. 范例 Example#1 A ctype_alpha() example (using the default locale) `<?php $strings = array('KjgWZC', 'arf12'); foreach ($strings as $testcase) { if (ctype_alpha($testcase)) { echo "The string $testcase consists of all letters.\n"; } else { echo "The string $testcase does not consist of all letters.\n"; } } ?>` 上例将输出： The string KjgWZC consists of all letters. The string arf12 does not consist of all letters. 参见 ctype_upper() ctype_lower() setlocale() ctype_alnum ctype_cntrl ctype PHP Manual

ctype_alpha

说明

参数

返回值

范例

参见