How do I count the frequency of each array value?

posted by best71 on 2009-07-07 12:27:34
Hello,
This is my array
 
$a = array();
$a[0] = "fruit";
$a[1] = "apple";
$a[2] = "tree";
$a[3] = "limon";
$a[4] = "apple";
$a[5] = "limon";
...
 
I count the values of the array with:
 
$new_array = array();
for($i=0;$i<count($a);$i++){
        if (array_key_exists($a[$i], $new_array))
                $new_array[$a[$i]] = $new_array[$a[$i]]+1;
        else
                $new_array[$a[$i]] = 1;
}
print_r($new_array);
 
can I optimize it?
Thanks
dail avatar
dail
12
Sure, there is PHP function to count all the values of an array, take a look at array_count_values()
Example:
 
$a = array();
$a[0] = "fruit";
$a[1] = "apple";
$a[2] = "tree";
$a[3] = "limon";
$a[4] = "apple";
$a[5] = "limon";
 
print_r(array_count_values($a));
 
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