ctype_xdigit

ctype_xdigit是一個程式函式。

基本介紹

  • 外文名：ctype_xdigit
  • 參數：text The tested string.
  • 說明：boolctype_xdigit
  • 類型：程式函式
概念釋義,說明,參數,返回值,範例,

概念釋義

(PHP 4 >= 4.0.4, PHP 5)
ctype_xdigit -- Check for character(s) representing a hexadecimal digit

說明

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

參數

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.

範例

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";
}
}
?> 上例將輸出：
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.

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