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php函数的引用参数及参数个数

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Release: 2016-06-06 20:02:22
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今天用到一个公共函数,但是 这个函数 有的地方参数只要两个,有的需要三个参数,经过分析,如下代码: ?php function f($a,$b){ $a=45; $b=64; $c=$a$b; return $c; } $x=0;$y=0; echo f($x,$y,true,'34',45); echo br; echo $x.'and'.$y; ? 以上输出 109 4


今天用到一个公共函数,但是 这个函数 有的地方参数只要两个,有的需要三个参数,经过分析,如下代码:


  function f(&$a,&$b){
     $a=45;
$b=64;
 
$c=$a+$b;
return $c;
  }
  
  $x=0;$y=0;
  
  echo f($x,$y,true,'34',45);
  echo "
";
  echo $x.'and'.$y;

  

?>


以上输出


109
45and64


总结:

   函数调用,参数的个数可以大于声明函数的参数个数,结果不受影响;



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