<?php

	// Array of whole numbers

	$array = array(25, 23, 4, 56, 257);

	// Custom function that returns minimum value of an array

	function getMinValue($array) {
		$min = $array[0];

		foreach($array as $key => $val) {
			if($min > $val) {
				$min = $val;
			}
		}
		return $min;
	}

	try {
		if(empty($array)) {
			throw new Exception("No values in array");
		}
		echo getMinValue($array);
	} catch(Exception $e) {
		echo $e->getMessage();
	}

?>