diff --git a/php/src/A.php b/php/src/A.php
index 253592b..a3973ca 100644
--- a/php/src/A.php
+++ b/php/src/A.php
@@ -177,6 +177,13 @@ class A {
     return $pvalue;
   }
 
+  static final function shift(?array &$dest, int $count=1) {
+    if ($dest === null) return null;
+    $values = array_slice($dest, 0, $count);
+    $dest = array_slice($dest, $count);
+    return $count == 1? $values[0]: $values;
+  }
+
   static final function pop(&$dest, $key, $default=null) {
     if ($dest === null) return $default;
     self::ensure_narray($dest);