chr (PHP 4, PHP 5, PHP 7) chr - Return a specific character chr - 返回指定的字符 Description string chr ( int $ascii ) //Returns a one-character string containing the character specified by ascii. //返回相对应于 ascii 所指定的单个字符. //This function complements ord().…
对于ASCII以及CHR函数的用法,Oracle给出的解释是: ASCII(x)gets the ASCII value of the character X, CHR() and ASCII() have the opposite effect. 即:ASCII函数是用于将字符转换成其相应的ASCII码,而CHR函数作用则恰好相反: 下面我来看一些简单的例子: SELECT ASCII('x'), ASCII('y'),ASCII('z') from dual; 语句执行的结果为 120,12…
explode (PHP 4, PHP 5, PHP 7) explode - Split a string by string explode - 使用一个字符串分割另一个字符串 Description array explode ( string $delimiter , string $string [, int $limit = PHP_INT_MAX ] ) //Returns an array of strings, each of which is a substring of s…
string常用成员函数 std::string::clear Clear string Erases the contents of the string, which becomes an empty string (with a length of 0 characters). Parameters none Return value none Example // string::clear #include <iostream> #include <string> int…
ord (PHP 4, PHP 5, PHP 7) ord - Return ASCII value of character ord - 返回字符的 ASCII 码值 Description int ord ( string $string ) //Returns the ASCII value of the first character of string. //返回字符串 string 第一个字符的 ASCII 码值. //This function complements chr().…
String对象: 1.length属性 说明:获取字符串的长度 实例: var str="abc"; var i=str.length;//output:3 2.charAt()方法 说明:从字符串中找出一个指定索引(位置)的字符 实例: var str="abc"; var str1=str.charAt(2);//output:c //字符串索引从0开始 3.indexOf()方法 说明:得到子字符串在母字符串中第一次出现的位置(下标),如找不到则输出&quo…