php数组列的行索引检索

Can we get the row index of a column in a 2 dimensional php array. I need to get the index of row as it was in the php array.

<?php

//Demo Array
$ARRAY = arrauy(
    "0" => array(
        "col1"=>"",
        "col2"=>"",
        "col3"=>"",
        "col4"=>"",
        "col5"=>"",
    ),
    "1" => array(
        "col1"=>"",
        "col2"=>"",
        "col3"=>"",
        "col4"=>"",
        "col5"=>"",
    ),
    "2" => array(
        "col1"=>"",
        "col2"=>"",
        "col3"=>"",
        "col4"=>"",
        "col5"=>"",
    ),
    "3" => array(
        "col1"=>"",
        "col2"=>"",
        "col3"=>"",
        "col4"=>"",
        "col5"=>"",
    ),
    "4" => array(
        "col1"=>"",
        "col2"=>"",
        "col3"=>"",
        "col4"=>"",
        "col5"=>"",
    ),
);

foreach($ARRAY as $rowkey=>$rowval)
{
    foreach($rowval as $colkey=>$colval)
    {
        echo($rowkey);
    }
}

?>