php入门之 js数组遍历与php的区别

• JS

  <script>
    //js需要先申明变量
    let arr= ["apple","banana","orange","cherry","lemon"];
    for (let i=0; i<arr.length ;i++) {
        console.log(arr[i]);
    }
    arr.forEach(arr=>console.log(arr));
    </script>

• PHP

  <?php
  //php数组遍历
  //变量不需要声明直接使用
  $arrs = ["apple","banana","orange","cherry","lemon"];
  for($i=0;$i<count($arrs);$i++) {
    echo $arrs[$i] ."<br>";
  };
  echo "<hr>";
  foreach($arrs as $arr) {
    echo $arr;
  }
  ?>