<?php
	
	function array_first_key(array $array)
	{
		$keys = array_keys($array);
		
		return reset($keys);
	}
	
	$array = range("A", "Z");
	
	foreach($array as $key => $value)
	{
		if(array_first_key($array) == $key)
		{
			echo "İlk öğe\n";
		}
		else
		{
			echo "Diğer öğe\n";
		}
	}