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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
function myFunc($arr)
{
$count = count($arr);
for ($i = 0; $i < $count; $i++) {
for ($k = 0; $k !=$i; $k++) {
if ($arr[$i] == $arr[$k]) {
return false;
}
}
}
return true;
}
$arr = [1,1, 2, 3, 4,];
var_dump(myFunc($arr));