"Cannot use string offset as an array" when referencing an array element by key

I'm trying to access the value ('Id') of an array.

This is my code to access the array:

$value[0]['Id']

This is the error: X

Cannot use string offset as an array

The array that I try to access: Y

array(1) { [0]=> array(1) { ["Id"]=>开发者_运维问答 string(2) "42"} }

The surounding code

$query = "select Id from test where Tags = " .  "\"$chosedOption[1]\""; 
    $result = mysql_query($query, $link);
    $value = mysqlArray($result);
    $value_id = null;
    $value_id = $value[0]['Id']; // gives X
    var_dump($value[0]['Id']); 
    var_dump($value); // gives Y


function mysqlArray($result) {
$table_result = array();
$r = 0;
while($row = mysql_fetch_assoc($result)) {
    $arr_row = array();
    $c = 0;
    while ($c < mysql_num_fields($result)) {
        $col = mysql_fetch_field($result, $c);
        $arr_row[$col -> name] = $row[$col -> name];
        $c++;
    }
    $table_result[$r] = $arr_row;
    $r++;
}
return $table_result; }

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Can it be that $value_id already has a (string) value?

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Replace mysqlArray($result); with mysql_fetch_array($result);