Need to pay attention to json_encode after php array_unique_PHP tutorial

For example: array_unique(array(1, 1, 2));
The result is
array(2) {
[0]=>
int(1)
[2 ]=>
int(2)
}

This is not a numeric array. Doing json_encode directly will output a json object instead of an array
{"0":1 ,"2":2}

If the js on the page needs the array data format [1,2] at this time, an error may occur

At this time, it should be in array_unique After that, make an array_values ​​
like this: array_values(array_unique(array(1, 1, 2)));

The result is [1,2]

http://www.bkjia.com/PHPjc/322698.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/322698.htmlTechArticleFor example: array_unique(array(1, 1, 2)); His result is array(2) { [ 0]= int(1) [2]= int(2) } This is not a numeric array. Doing json_encode directly will output a json object instead of...