php怎麼實現資料替換

// 参数 $search,要替换的字符串，或数组 // 参数 $replace,被用来替换的字符串或数组 // 参数 $subject,被查询的字符串或数组 // 参数 $count，可选，如果被指定，将为设置为替换的次数 // 返回值：该函数返回替换后的数组或者字符串(新生成的) //实例一：字符串替换字符串 $str1 = str_replace("red","black","red green yellow pink purple"); echo $str1.""; //输出结果为black green yellow pink purple //实例二：字符串替换数组键值 $arr = array("blue","red","green","yellow"); $str1 = str_replace("red","pink",$arr,$i); print_r($str1); //实例三：数组替换数组，映射替换 $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); //实例四：如$search为数组，$replace为字符串时 $search = array("banana","grape"); $replace = "tomato"; $arr = array("banana","apple","orange","grape"); $new_arr = str_replace($search,$replace,$arr,$count); print_r($new_arr);