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php数据类型01

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Release: 2016-06-06 19:57:57
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1.数据类型: 标量类型:整型(int),浮点型(float),字符串型(string),布尔型(boolean) 符合类型:数组(array),对象(object) 其他类型:资源(resource),NULL 2.$a = 123; echo 11$a; //$a能打出来 echo 11$a11; //$a打不出,php默认$a11是一

1.数据类型:

        标量类型:整型(int),浮点型(float),字符串型(string),布尔型(boolean)

        符合类型:数组(array),对象(object)

        其他类型:资源(resource),NULL

 

2.$a = "123";

       echo "11$a";           //$a能打出来

       echo "11$a11" ;      //$a打不出,php默认$a11是一个变量,解决方法如下:

       echo "11{$a}11";      //php只解析大括号里的变量

3.结尾定界符前不能有任何东西,要顶行写

             $a =

           
                  
                
                           

123

               
           
xxx;                   //要顶行写
echo $a;

4.为false的布尔类型:

    FALSE , 0 , 0.0 ,  空字符串 ,字符串为0 ,NULL ,空数组

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