Internet Watch

Record a PHP error: the interface return is null, print_r or echo can output, but with a null string at the end.

There are two situations.

1. There is an error in the json string, causing an error in json_decode.

2. There is no return result in the function of the interface, but the result is returned in other functions called.

Record a problem: nuxt page, click to enter normal, refresh and report an error.

The problem is in a layout.

 data() {
    return {
       routeData: {},//This turned out to be this.$route, and an error was reported after refreshing. After changing it to an empty object, everything will be fine.
       ...
    }
...
  watch: {
...
    "$store.state.routeData": {
      handler: function (newVal, oldVal) {
        console.log(this.$store.state.routeData);
        this.routeData = this.$store.state.routeData;
       
      },
    },
  },

In the ssr mode of nuxt, a refresh error occurs. You can check three places: data, asyncData, and store.

php,change the data type to int use: (int). at value front.

it's special.

Grasp with both hands, both hands must be hard.

Focus on core competitiveness with one hand and user ecology with the other.