這篇文章主要介紹了php ctype函數中文翻譯和示例,相關函數示例列出了多個,需要的朋友可以參考下
PHP Ctype擴展是PHP4.2開始就內建的擴展,注意,Ctype系列函數都只有一個字符串類型參數,它們返回布爾值。 代碼如下: $str = "0.1123"; //檢查字符串所有字符是否為數字 echo "ctype_digit:" . ctype_digit($str); //空 //檢測是否為數字字符串,可為負數和小數 echo "is_numberic:" . is_numeric($str); //1 從上面可以看出ctype_digit()和is_numberic()的區別。 中文翻譯 Ctype函數是PHP內置的字符串體測函數。主要有以下幾種 ctype_alnum -- Check for alphanumeric character(s) 檢測是否是只包含[A-Za-z0-9] ctype_alpha -- Check for alphabetic character(s) 檢測是否是只包含[A-Za-z] ctype_cntrl -- Check for control character(s) 檢查是否是只包含類是“nrt”之類的字 符控制字符 ctype_digit -- Check for numeric character(s) 檢查時候是只包含數字字符的字符串(0-9) ctype_graph -- Check for any printable character(s) except space 檢查是否是只包含有可以打印出來的字符(除了空格)的字符串 ctype_lower -- Check for lowercase character(s) 檢查是否所有的字符都是英文字母,並且都是小寫的 ctype_print -- Check for printable character(s) 檢查是否是只包含有可以打印出來的字符的字符串 ctype_punct -- Check for any printable character which is not whitespace or an alphanumeric character 檢查是否是只包含非數字/字符/空格的可打印出來的字符 ctype_space -- Check for whitespace character(s) 檢查是否是只包含類是“ ”之類的字符和空格 ctype_upper -- Check for uppercase character(s) 檢查是否所有的字符都是英文字母,並且都是大寫的 ctype_xdigit -- Check for character(s) representing a hexadecimal digit 檢查是否是16進制的字符串,只能包括 “0123456789abcdef” 有示例的喲 我們平常在遇到要對一些表單做簡單過濾的時候,往往不太願意寫正則,而且在效率上,正則也是影響PHP運行速度的原因之一,所以在能不試用正則的時候盡量不試用正則。幸好PHP已經為我們考慮到了這一點,給我提供了Ctype函數。下面對一些Ctype函數做一些簡單介紹,以備用: 1、ctype_alnum — Check for alphanumeric character(s) 檢查字符串中只包含數字或字母,相當於正則[A-Za-z0-9]. 有返回值。成功時返回TRUE,失敗為FALSE; [ 代碼如下: <?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"; 輸出The string AbCd1zyZ9 consists of all letters or digits. } else { echo "The string $testcase does not consist of all letters or digits.n"; 輸出 The string foo!#$bar does not consist of all letters or digits. } } ?> 2、ctype_alpha — Check for alphabetic character(s) 檢查字符串中只包含字母。 成功時返回TRUE,失敗為FALSE; 代碼如下: <?php $strings = array('KjgWZC', 'arf12'); foreach ($strings as $testcase) { if (ctype_alpha($testcase)) { echo "The string $testcase consists of all letters.n"; 輸出 The string KjgWZC consists of all letters. } else { echo "The string $testcase does not consist of all letters.n";<span style="white-space:pre"> </span> 輸出 The string arf12 does not consist of all letters. } } ?> 3、ctype_cntrl — Check for control character(s) 檢查字符串中是否只包含" 'n' 'r' 't' " 這樣的控制字符。 代碼如下: <?php $strings = array('string1' => "nrt", 'string2' => 'arf12'); foreach ($strings as $name => $testcase) { if (ctype_cntrl($testcase)) { echo "The string '$name' consists of all control characters.n"; 輸出 The string 'string1' consists of all control characters. } else { echo "The string '$name' does not consist of all control characters.n"; The string 'string2' does not consist of all control characters. } } ?> 4、ctype_digit — Check for numeric character(s) 檢查字符串中是否只包含數字 代碼如下: <?php $strings = array('1820.20', '10002', 'wsl!12'); foreach ($strings as $testcase) { if (ctype_digit($testcase)) { echo "The string $testcase consists of all digits.n"; } else { echo "The string $testcase does not consist of all digits.n"; } } ?>