PHP 中的 ctype_alpha()函数

ctype_alpha() - 语法

ctype_alpha ( $text );

它检查提供的字符串text中的所有字符是否都是字母。

ctype_alpha() - 返回值

如果文本中的每个字符都是字母，则返回TRUE，否则返回FALSE。

ctype_alpha() - 示例

<?php
   $strings=array('example', 'example1234');
   
   foreach ($strings as $test) {
      if (ctype_alpha($test)) {
         echo "$test consists of all letters.\n";
      }else {
         echo "$test does not have all letters.\n";
      }
   }
?> 

这将产生以下输出-

example consists of all letters.
example1234 does not have all letters.