更改数组键名和键值为大写

  //更改数组键名和键值为大写
  $szarray=array("a"=>"bNc","b"=>"cai","c"=>array("ej"=>"rj1","sj"=>"yANG","d"=>array("wj"=>"Huazi","wjl"=>"rs")));
  $uparray=array();
  print_r($szarray);
  echo "<br/>";
 Zdx($szarray,CASE_UPPER);
  print_r($szarray);  
  
  function Zdx(&$szarray,$case=CASE_UPPER){
	  if(!is_array($szarray)){
		  return array();
	  }
	  $szarray=array_change_key_case($szarray,$case);
	  
	  foreach($szarray as $key=>$value){		  
		  if (is_array($value)){
			  Zdx($szarray[$key],$case);			  			  			  
		  }else{			   	  
			  $szarray[$key]=strtoupper($value);
		  }	  		  		  		  
	  }
  }

替换数组的关键字

$keyword=array('小李','人人','ceshi');
  $str='这是小李的书包，人人都要爱护，ceshi的良好环境。';
  $str=tihuan($str,$keyword);
  print_r($str);
  
 function tihuan($str,$keyword){
	  foreach($keyword as $value){
		  $str=str_replace($value,'**',$str);
	  }
	  return $str;
  }