How to modify json data in php

php method to modify json data: first read the data from the file into PHP variables; then convert the JSON string into a PHP array; finally pass "file_put_contents("text.json",$json_strings);" The method can modify the json data.

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php Read and write json files, append and modify json

// 追加写入用户名下文件
$code="001";//动态数据
        $json_string = file_get_contents("text.json");// 从文件中读取数据到PHP变量
        $data = json_decode($json_string,true);// 把JSON字符串转成PHP数组
        $data[$code]=array("a"=>"as","b"=>"bs","c"=>"cs");
        $json_strings = json_encode($data);
        file_put_contents("text.json",$json_strings);//写入
//修改
  $json_string = file_get_contents("text.json");// 从文件中读取数据到PHP变量
        $data = json_decode($json_string,true);// 把JSON字符串转成PHP数组
        $data["001"]["a"]="aas";
        $json_strings = json_encode($data);
        file_put_contents("text.json",$json_strings);//写入

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