This question has already been answered:
There is a simple array
$arr = array(2, 5, 5, 3 ,2, 1, 5, 7, 1); How to display only all unique non-duplicate values? Those. the output should be 2, 5, 3, 1, 7
The function array_unique ($ arr) cannot be used.
A similar question was asked earlier and an answer has already been received. If the answers provided are not exhaustive, please ask a new question .
It is possible so:
$arr = array(2, 5, 5, 3 ,2, 1, 5, 7, 1); $uniq_arr = array(); foreach ($arr AS $item) { if (!in_array($item, $uniq_arr)) { $uniq_arr[] = $item; echo $item . "\n"; } } 
array_count_values() or in addition to it array_filter() - teranI do not know the features of the php language. But if you create a new array, var unique = []; and in the loop, check whether the element in src is contained, something like $arr.contains(_ell); if not contained, add to the unique array.
As for the syntax of the function that checks whether an element exists in the array, I’m not sure, because I don’t write to php.
Source: https://ru.stackoverflow.com/questions/602474/
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вывести только все уникальные не повторяющиеся значенияthen the link to the duplicate is higher ↑ - Alexey Shimanskyне повторяющиеся уникальные элементыin your array are 3 and 7 ..... although, perhaps, you had in mind that option and not this ....... The twofold wording came out simply - Alexey Shimansky