array iteration/duplicaton search

[Kasuke_Akira]

I was curious if someone had an example of how to pull the first value out of an array ($array[0]) and compare it to every following value in the array ($array[1],[2],etc....)  Then compare the next value ($array[1]) and compare it to every following value ($array[2],[3],etc....).  The goal is to find any matches and, if so, to report that match.

 

I'm having trouble how to figure it out.

 

Someone recommended a combination of foreach() and array_search() but I didn't get it.

[Barand]

try

<?php
$a  = array(1,2,3,2,4,1,5);

$k = count($a);

for($i=0; $i<$k-1; $i++) {
    for ($j=$i+1; $j<$k; $j++) {
        if ($a[$i] == $a[$j]) {
            echo "Duplicate value $a[$i], keys $i and $j<br>";
        }
    }
}
?>