php更改嵌套数组项的具体值

Question

我有以下嵌套数组，我试图将每个嵌套的索引[1]从十六进制值转换为ascii。当我一次引用一个函数时，我已经有一个完美转换的函数但是当我尝试在for循环中遍历它时，我的输出日志文件中没有任何内容。

这是数组：

Array
(
    [0] => Array
        (
            [0] => E2007C84D20119B16F6FD066
            [1] => 37373535303931383400000000000000
            [2] => 9/7/2016 10:42:51 PM
            [3] => -57
            [4] => 1
        )

    [1] => Array
        (
            [0] => E2007C84D200ABB16F6FCEAE
            [1] => 37363835303032323000000000000000
            [2] => 9/7/2016 10:42:51 PM
            [3] => -62
            [4] => 1
        )

    [2] => Array
        (
            [0] => E2007C84D20133316F6FD0CC
            [1] => 37373335313834323400000000000000
            [2] => 9/7/2016 10:42:52 PM
            [3] => -52
            [4] => 1
        )

    [3] => Array
        (
            [0] => E2007C84D2008B716F6FCE2D
            [1] => 37363930303032383400000000000000
            [2] => 9/7/2016 10:42:54 PM
            [3] => -58
            [4] => 2
        )

    [4] => Array
        (
            [0] => E2007C84D200D3316F6FCF4C
            [1] => 37373335313534343300000000000000
            [2] => 9/7/2016 10:42:54 PM
            [3] => -52
            [4] => 1
        )

    [5] => Array
        (
            [0] => E2007C84D2006C316F6FCDB0
            [1] => 37373630303032303600000000000000
            [2] => 9/7/2016 10:42:54 PM
            [3] => -54
            [4] => 1
        )

    [6] => Array
        (
            [0] => E2007C84D1544EF16F6E753B
            [1] => 37373230393131333800000000000000
            [2] => 9/7/2016 10:42:57 PM
            [3] => -62
            [4] => 2
        )    
)

这就是我一直在尝试的for循环：

for each ($dataArray[0] as $dataItem) {

    $dataItem[1] = hex2str($dataItem[1]);
}

PHP数组总是给我带来麻烦。