Data commit

Task/Balanced-brackets/PHP/balanced-brackets.php

@@ -0,0 +1,33 @@
+#!/usr/bin/php
+<?php
+
+# brackets generator
+function bgenerate ($n) {
+    if ($n==0) return '';
+    $s = str_repeat('[', $n) . str_repeat(']', $n);
+    return str_shuffle($s);
+}
+
+function printbool($b) {return ($b) ? 'OK' : 'NOT OK';}
+
+function isbalanced($s) {
+    $bal = 0;
+    for ($i=0; $i < strlen($s); $i++) {
+        $ch = substr($s, $i, 1);
+        if ($ch == '[') {
+            $bal++;
+        } else {
+            $bal--;
+        }
+        if ($bal < 0) return false;
+    }
+    return ($bal == 0);
+}
+
+# test parameters are N (see spec)
+$tests = array(0, 2,2,2, 3,3,3, 4,4,4,4);
+
+foreach ($tests as $v) {
+    $s = bgenerate($v);
+    printf("%s\t%s%s", $s, printbool(isbalanced($s)), PHP_EOL);
+}