Adding PHP examples

02_selection_sort/php/01_selection_sort.php

@@ -0,0 +1,26 @@
+<?php
+
+function findSmall(array $arr)
+{
+    $smallest = $arr[0];
+    $smallestIndex = 0;
+    for ($i = 0; $i < count($arr); $i++) {
+        if ($arr[$i] < $smallest) {
+            $smallest = $arr[$i];
+            $smallestIndex = $i;
+        }
+    }
+    return $smallestIndex;
+}
+
+function selectionSort(array $arr)
+{
+    $newArr = [];
+    for ($i = 0, $length = count($arr); $i < $length; $i++) {
+        $smallest = findSmall($arr);
+        array_push($newArr, array_splice($arr, $smallest, 1)[0]);
+    }
+    return $newArr;
+}
+
+var_dump(selectionSort([5, 3, 6, 2, 10])); // [2, 3, 5, 6, 10]