Lets say I have a simple 1D array with 10-20 entries. Some will be duplicate, How would I find out which entry is used the most? like..
$code = Array("test" , "cat" , "test" , "this", "that", "then");
How would I show "test" as the most used entry?
$code = Array("test" , "cat" , "test" , "this", "that", "then");
function array_most_common($input) {
$counted = array_count_values($input);
arsort($counted);
return(key($counted));
}
echo '<pre>';
print_r(array_most_common($code));
arsort versus rolling your own for loop makes the sort come out faster in practice; I don't know.You can get a count of the number of occurrences of each value by using array_count_values.
$code = array("test" , "cat" , "cat", "test" , "this", "that", "then");
$counts = array_count_values($code);
var_dump($counts);
/*
array(5) {
["test"]=>
int(2)
["cat"]=>
int(2)
["this"]=>
int(1)
["that"]=>
int(1)
["then"]=>
int(1)
}
*/
To get the most frequently occurring value, you can call max on the array and then access the (first) value with array_search.
$code = array("test" , "cat" , "cat", "test" , "this", "that", "then");
$counts = array_count_values($code);
$max = max($counts);
$top = array_search($max, $counts);
var_dump($max, $top);
/*
int(2)
string(4) "test"
*/
If you wish to cater for multiple most-frequent values, then something like the following would work:
$code = array("test" , "cat" , "cat", "test" , "this", "that", "then");
$counts = array_count_values($code);
$max = max($counts);
$top = array_keys($counts, $max);
var_dump($max, $top);
/*
int(2)
array(2) {
[0]=>
string(4) "test"
[1]=>
string(3) "cat"
}
*/
