str_replace 4個用法

//實例一：字符串替換字符串
$str1 = str_replace("red","black","red green yellow pink purple");
echo $str1;    //輸出結果爲black green yellow pink purple


//實例二：字符串替換數組鍵值(替換多個)
$arr = array("blue","red","greenred","yellow");
$str1 = str_replace("red","pink",$arr,$i);
print_r($str1);


//實例三：數組替換數組，映射替換
$arr1 = array("banana","orange");
$arr2 = array("pitaya","tomato");
$con_arr = array("apple","orange","banana","grape");
$con_rep = str_replace($arr1,$arr2,$con_arr,$count);
print_r($con_rep);


//實例四：如$search爲數組，$replace爲字符串時
$search = array("banana","grape");
$replace = "tomato";
$arr = array("banana","apple","orange","grape");
$new_arr = str_replace($search,$replace,$arr,$count);
print_r($new_arr);