thinkphp foreach循环生成二维数组的方法

先做个问题记录,另外下面是做的过程中遇到的一个没想明白的现象

foreach($result as $key => $val ){
    $wzList[$key]['lik']=$val[0];
    $wzList[$key]["likN"]=$val[1];
}
用这种方法生成的数组是这样的：

array(9) {
  [0] => array(2) {
    ["lik"] => string(45) "coll_fa4c5d7a78118c73a9a6c2421ae3e40a.html"
    ["likN"] => string(60) "如果女同事偷偷拿它射你，蜜汁尴尬了。。。"
  }
  [1] => array(2) {
    ["lik"] => string(42) "coll_fa4c5d7a78118c73a9a6c2421ae3e40a.html"
    ["likN"] => string(60) "如果女同事偷偷拿它射你，蜜汁尴尬了。。。"
  }
  [2] => array(2) {
    ["lik"] => string(42) "coll_fba8ebd181d6b7526f7b2aa50a366a44.html"
    ["likN"] => string(72) "好消息！！广州汽车客运站已经开始售春节回家的票了"
  }
  [3] => array(2) {
    ["lik"] => string(42) "coll_e988992a2881ab957e8f3e19bbfc2da8.html"
    ["likN"] => string(45) "看了之后，你还敢去超市买菜吗？"
  }
  [4] => array(2) {
    ["lik"] => string(42) "coll_e988992a2881ab957e8f3e19bbfc2da8.html"
    ["likN"] => string(45) "看了之后，你还敢去超市买菜吗？"
  }
  [5] => array(2) {
    ["lik"] => string(42) "coll_e988992a2881ab957e8f3e19bbfc2da8.html"
    ["likN"] => string(45) "看了之后，你还敢去超市买菜吗？"
  }
  [6] => array(2) {
    ["lik"] => string(42) "coll_6bf7e13f69e5a362fc3065db2f4c1b0f.html"
    ["likN"] => string(66) "原始生态小洲村，带你走入繁华城市中的一片净土"
  }
  [7] => array(2) {
    ["lik"] => string(42) "coll_6bf7e13f69e5a362fc3065db2f4c1b0f.html"
    ["likN"] => string(66) "原始生态小洲村，带你走入繁华城市中的一片净土"
  }
  [8] => array(2) {
    ["lik"] => string(42) "coll_0896ab80d68a7d0806f51d3b3324ca5a.html"
    ["likN"] => string(44) "帮我做个APP，给你20万，做不做？"
  }
}

foreach($result as $key => $val ){
    $wzList[]['lik']=$val[0];
    $wzList[]["likN"]=$val[1];
}
用这个方法生成的二维数组却是这样的：
array(18) {
  [0] => array(1) {
    ["lik"] => string(45) "coll_fa4c5d7a78118c73a9a6c2421ae3e40a.html"
  }
  [1] => array(1) {
    ["likN"] => string(60) "如果女同事偷偷拿它射你，蜜汁尴尬了。。。"
  }
  [2] => array(1) {
    ["lik"] => string(42) "coll_fa4c5d7a78118c73a9a6c2421ae3e40a.html"
  }
  [3] => array(1) {
    ["likN"] => string(60) "如果女同事偷偷拿它射你，蜜汁尴尬了。。。"
  }
  [4] => array(1) {
    ["lik"] => string(42) "coll_fba8ebd181d6b7526f7b2aa50a366a44.html"
  }
  [5] => array(1) {
    ["likN"] => string(72) "好消息！！广州汽车客运站已经开始售春节回家的票了"
  }
  [6] => array(1) {
    ["lik"] => string(42) "coll_e988992a2881ab957e8f3e19bbfc2da8.html"
  }
  [7] => array(1) {
    ["likN"] => string(45) "看了之后，你还敢去超市买菜吗？"
  }
  [8] => array(1) {
    ["lik"] => string(42) "coll_e988992a2881ab957e8f3e19bbfc2da8.html"
  }
  [9] => array(1) {
    ["likN"] => string(45) "看了之后，你还敢去超市买菜吗？"
  }
  [10] => array(1) {
    ["lik"] => string(42) "coll_e988992a2881ab957e8f3e19bbfc2da8.html"
  }
  [11] => array(1) {
    ["likN"] => string(45) "看了之后，你还敢去超市买菜吗？"
  }
  [12] => array(1) {
    ["lik"] => string(42) "coll_6bf7e13f69e5a362fc3065db2f4c1b0f.html"
  }
  [13] => array(1) {
    ["likN"] => string(66) "原始生态小洲村，带你走入繁华城市中的一片净土"
  }
  [14] => array(1) {
    ["lik"] => string(42) "coll_6bf7e13f69e5a362fc3065db2f4c1b0f.html"
  }
  [15] => array(1) {
    ["likN"] => string(66) "原始生态小洲村，带你走入繁华城市中的一片净土"
  }
  [16] => array(1) {
    ["lik"] => string(42) "coll_0896ab80d68a7d0806f51d3b3324ca5a.html"
  }
  [17] => array(1) {
    ["likN"] => string(44) "帮我做个APP，给你20万，做不做？"
  }
}

基础太差了，想了好久没想清楚这两者的区别，求高手指教....