How to allow duplicate keys in php array [duplicate]
You could have a single key that has a value of an array(aka a multi-dimensional array), which would contain all the elements with that given key. An example might be
$countries = array( "United States" => array("California", "Texas"), "Canada" => array("Ontario", "Quebec"));
$array[$key][] = $value;You then access it via:
echo $array[$key][0];echo $array[$key][1];Etc.
Note you are creating an array of arrays using this method.
The whole point of array is to have unique keys. If you want to store pairs of values, then:
$array[] = [$value1, $value2];If you have many dupes, then this alternative will be more efficient:
<?phpif (array_key_exists($key, $array)) $array[$key]['occurrences']++; else $array[$key] = ['value'=>$value, 'occurrences'=>1];