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Example code of the difference between JS and PHP in passing variable parameters to functions

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2017-03-22 16:17:281052browse

# JS method of calling a function to pass variable parameters

<script> 
function test() { 
   for(var i = 0;i < arguments.length; i++) { 
   alert(arguments[i]); 
  } 
} 
//调用函数 
test(1, 2, 3, &#39;abc&#39;); 
</script>

PHP method of calling a function to pass variable parameters

<?php 
  //方法一 
  //接收一系列参数,并逐一输出 
  function show_params () { 
    //获取传递参数的个数 
    $count = func_num_args(); 
    //遍历参数并逐一输出 
    for ($i = 0; $i < $count; $i++) { 
      //获取参数 
      $param = func_get_arg($i); 
      echo $param . PHP_EOL; 
    } 
  } 
  //调用函数 
  show_params(1, 2, &#39;apple&#39;, 3.14); 
  //方法2 
  function show_params () { 
    //定义存储传递参数的数组 
    $params = array(); 
    //获取全部参数 
    $params = func_get_args(); 
    $count = count($params); 
    //遍历并逐一输出参数 
    for ($i = 0; $i < $count; $i++) { 
      echo $params[$i]; 
      echo PHP_EOL; 
    } 
  } 
 //注: 方法2比方法1执行的慢一些

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