相关疑难解决方法(0)

如何从PHP中的多维数组中删除重复值？

示例数组:

Array
(
    [0] => Array
    (
        [0] => abc
        [1] => def
    )

    [1] => Array
    (
        [0] => ghi
        [1] => jkl
    )

    [2] => Array
    (
        [0] => mno
        [1] => pql
    )

    [3] => Array
    (
        [0] => abc
        [1] => def
    )

    [4] => Array
    (
        [0] => ghi
        [1] => jkl
    )

    [5] => Array
    (
        [0] => mno
        [1] => pql
    )

)

我对包含以下if语句的程序有疑问:

if (x =+ 4){
    x += 5;
}

我以前从未见过这样的东西,肯定不是拼写错误？= = +实际上做了什么吗？