get value of checkbox php code example

Example 1: get key of last element php

//(PHP 7 >= 7.3.0)
$key = array_key_last($data);

//ALL PHP Versions
end($data);         // move the internal pointer to the end of the array
$key = key($data);  // fetches the key of the element pointed to by the internal pointer

Example 2: check if array has value php

$myArr = [38, 18, 10, 7, "15"];

echo in_array(10, $myArr); // TRUE
echo in_array(19, $myArr); // TRUE

// Without strict check
echo in_array("18", $myArr); // TRUE
// With strict check
echo in_array("18", $myArr, true); // FALSE