PHP：获取关联数组中的最后一个元素

Question

I have a for loop .

$TOTAL_GOALS = 5;
for($i= 1; $i<=$TOTAL_GOALS; $i++) {
    $EACH_POST_QUERY = mysql_query("SELECT item_id FROM likes WHERE item_id='$i'");
    $EACH_POST_TOTAL_LIKES = mysql_num_rows($EACH_POST_QUERY);
    $EACH_POST_RESULT = array();
    $EACH_POST_RESULT[$i] = $EACH_POST_TOTAL_LIKES;
}

In the loop, I'm dynamically firing queries and fetching result into a variable called $EACH_POST_TOTAL_LIKES .

I want to make an associative array based on this. So, I have created an array called $EACH_POST_RESULT = array(); and pushing value into it.

The output I'm getting is the last element - example:

3:16

My expected output is -

1:12 2:14 3:16

I'm sending result to JS using this -

$SERVER_DATA = array("TG"=>$TOTAL_GOALS, "EACH_POST_LIKES"=> $EACH_POST_RESULT);
echo json_encode($SERVER_DATA);

Console is showing me only last entry. Why does array overwriting values and storing last one?

What is missing?

Answer 1

You are creating array every time in the loop. I would suggest you to implement this in single query using MySQL Between Clause if you want to get count of all parameters once.

Try this:

 $TOTAL_GOALS = 5; $EACH_POST_RESULT = array(); for ($i = 1; $i <= $TOTAL_GOALS; $i++) { $EACH_POST_QUERY = mysql_query("SELECT item_id FROM likes WHERE item_id='$i'"); $EACH_POST_TOTAL_LIKES = mysql_num_rows($EACH_POST_QUERY); array_push($EACH_POST_RESULT, $EACH_POST_TOTAL_LIKES); } 

Answer 2

You need to move this line before the loop:

$EACH_POST_RESULT = array();

Otherwise it will be replaced with an empty array each time!