[?]PHP??函数
?自:http://www.cnblogs.com/mrray/archive/2011/05/18/2050233.html
strtoupper($string);//全部换成大写
strtolower($string);//全部换成小写
ucwords($string);//单词的首字母换成大写
strrpos()函数查找字符串在另一个字符串中最后一次出现的位置。[string,]
PHP的数据类型转换属于强制转换,允许转换的PHP数据类型有:
(int)、(integer):转换成整形 (float)、(double)、(real):转换成浮点型 (string):转换成字符串 (bool)、(boolean):转换成布尔类型 (array):转换成数组 (object):转换成对象PHP数据类型有三种转换方式:
在要转换的变量之前加上用括号括起来的目标类型 使用3个具体类型的转换函数,intval()、floatval()、strval() 使用通用类型转换函数settype(mixed var,string type)第一种转换方式: (int) (bool) (float) (string) (array) (object)
第二种转换方式: intval() floatval() strval()
第三种转换方式: settype();

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