How to convert a default empty string of the data table field demand_praiseid type varchar to an array

{Code ...} one of my demands for release is that no one is saving it. when I like it, I will retrieve the required demand_praiseid field and convert it to an array. I will save the uid to an array and then save the array in the converted json field. I don't know if I did this one day...

// Add the likes public function addPraisePeople ($ uid, $ deman_id) {$ demanid ['demand _ id'] = $ deman_id; $ m = D ('demo '); $ praiseid = $ m-> where ($ demandId)-> getField ('demand _ praiseid ');}

One of my demands for release is that no one is saving it. when I like it, I will retrieve the required demand_praiseid field and convert it to an array. I will save the uid to an array and then save the array in the converted json field.

I don't know if I have made this project too complicated.

Reply content:

// Add the likes public function addPraisePeople ($ uid, $ deman_id) {$ demanid ['demand _ id'] = $ deman_id; $ m = D ('demo '); $ praiseid = $ m-> where ($ demandId)-> getField ('demand _ praiseid ');}

One of my demands for release is that no one is saving it. when I like it, I will retrieve the required demand_praiseid field and convert it to an array. I will save the uid to an array and then save the array in the converted json field.

I don't know if I have made this project too complicated.

First, after understanding your question, you should ask:
There is a data table field of the varchar type. after you obtain the value of this field using PHP, how can you convert the value of this field into an array?
Second, if you want to convert the content of demand_praiseid into an array, you have to convert it according to your demand_praiseid structure.
PHP has a function that converts a string to an array:
Explode (separator, string, limit)
Parameter description: separator: required. Specifies where to split the string.
String: required. The string to be split.
Limit: Optional. Specifies the number of returned array elements. Possible values: greater than 0-returns an array containing up to limit elements less than 0-returns an array containing all elements except the last-limit elements 0-returns an array containing one element
I hope to help you, but I don't seem to quite understand your needs.