How to read and write json files in php and modify json methods

This article mainly shares with you a method of reading and writing json files and modifying json in PHP. It has a good reference value and I hope it can help everyone.

The example is as follows:

// 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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