✨ Two more stars in PHP!

2020/9/XMAS.php

@@ -0,0 +1,29 @@
+#!/usr/bin/env php
+<?php
+
+$length = 25;
+
+$lines = explode("\n", file_get_contents("input"));
+$valid = 0;
+
+for($i=$length; $i<count($lines); $i++) {
+	$ival = $lines[$i];
+
+	for($x=$i-$length; $x<$i; $x++) {
+		$xval = $lines[$x];
+
+		for($y=$i-$length; $y<$x; $y++) {
+			$yval = $lines[$y];
+			if(($xval + $yval) == $ival) {
+				$valid = $i;
+			}
+		}
+	}
+
+	if($valid != $i)
+		break;
+}
+
+echo "First number with bad property is {$lines[$valid + 1]}\n";
+
+?>

2020/9/XMASpt2.php

@@ -0,0 +1,27 @@
+#!/usr/bin/env php
+<?php
+
+$lines = explode("\n", file_get_contents("input"));
+
+$number = 248131121;
+
+$sum = 0;
+$start = 0;
+
+for($i=0; $i<count($lines); $i++) {
+	$sum += intval($lines[$i]);
+
+	while($sum > $number)
+		$sum -= $lines[$start++];
+
+	if($sum === $number)
+		break;
+}
+
+$subset = array_slice($lines, $start, $i - $start);
+sort($subset);
+
+echo "Range starts on $start and ends on $i.\n";
+echo "Lowest {$subset[0]} and highest " . array_pop($subset) . "\n";
+echo "(you can sum them yourself)\n";
+?>