php count_chars() 函数实例介绍

编辑代码

<?php
/*
count_chars() 函数返回字符串中所用字符的信息
例如，ASCII 字符在字符串中出现的次数，或者某个字符是否已经在字符串中使用过。
*/

$data  =  "Two Ts and one F." ;

foreach ( count_chars ( $data ,  1 ) as  $i  =>  $val ) {
   echo  "There were  $val  instance(s) of \""  ,  chr ( $i ) ,  "\" in the string.<br/>" ;
}
?>