- var_dump: documentation ( source)
- array_keys: documentation ( source)
<?php
/**
* Check if variable is a numeric array.
*
* @param array|mixed $var
* @return bool
*/
$b=array(1,2);
function is_numeric_array($var): bool
{
if (!is_array($var)) {
return false;
}
$keys = array_keys($var);
return ($keys === array_keys($keys));
}
var_dump(is_numeric_array($b));