PHP$a[]和$a的区别

PHPa[]和a的区别

$a[]=array('b'=>'b','c'=>'c');$b=array('b'=>'b','c'=>'c');echo $a[0]['c'];//输出cecho $b['c'];//输出c也就是说$a[]本身就是一个数组，被array()赋值以后ibanchengle二维数组$a = array(1, 2, 3);$a[] = 5;这时，输出$a,Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 5 )$a = array(); //定义一个数组$a[] = 1;  //给数组赋值这时，输出$a,Array ( [0] => 1 )