- add short array syntax as defined in https://wiki.php.net/rfc/shortsyntaxforarrays, 2nd solution using => only

UPGRADING

@@ -448,4 +448,8 @@ UPGRADE NOTES - PHP X.Y
        - fnv164
        - joaat
 
-
+     k. New Syntax
+       - Short array syntax
+         $a = [1, 2, 3, 4];
+         $a = ['one' => 1, 'two' => 2, 'three' => 3, 'four' => 4];
+         $a = ['one' => 1, 2, 'three' => 3, 4];

Zend/zend_language_parser.y

@@ -761,6 +761,7 @@ expr_without_variable:
 	|	'@' { zend_do_begin_silence(&$1 TSRMLS_CC); } expr { zend_do_end_silence(&$1 TSRMLS_CC); $$ = $3; }
 	|	scalar				{ $$ = $1; }
 	|	T_ARRAY '(' array_pair_list ')' { $$ = $3; }
+ 	|	'[' array_pair_list ']' { $$ = $2; }
 	|	'`' backticks_expr '`' { zend_do_shell_exec(&$$, &$2 TSRMLS_CC); }
 	|	T_PRINT expr  { zend_do_print(&$$, &$2 TSRMLS_CC); }
 	|	function is_reference '(' { zend_do_begin_lambda_function_declaration(&$$, &$1, $2.op_type, 0 TSRMLS_CC); }
@@ -894,6 +895,7 @@ static_scalar: /* compile-time evaluated scalars */
 	|	'+' static_scalar { ZVAL_LONG(&$1.u.constant, 0); add_function(&$2.u.constant, &$1.u.constant, &$2.u.constant TSRMLS_CC); $$ = $2; }
 	|	'-' static_scalar { ZVAL_LONG(&$1.u.constant, 0); sub_function(&$2.u.constant, &$1.u.constant, &$2.u.constant TSRMLS_CC); $$ = $2; }
 	|	T_ARRAY '(' static_array_pair_list ')' { $$ = $3; Z_TYPE($$.u.constant) = IS_CONSTANT_ARRAY; }
+	|	'[' static_array_pair_list ']' { $$ = $2; Z_TYPE($$.u.constant) = IS_CONSTANT_ARRAY; }
 	|	static_class_constant { $$ = $1; }
 ;
 

tests/lang/array_shortcut_001.phpt

@@ -0,0 +1,13 @@
+--TEST--
+Square bracket array shortcut test
+--FILE--
+<?php
+print_r([1, 2, 3]);
+?>
+--EXPECT--
+Array
+(
+    [0] => 1
+    [1] => 2
+    [2] => 3
+)

tests/lang/array_shortcut_002.phpt

@@ -0,0 +1,13 @@
+--TEST--
+Square bracket associative array shortcut test
+--FILE--
+<?php
+print_r(["foo" => "orange", "bar" => "apple", "baz" => "lemon"]);
+?>
+--EXPECT--
+Array
+(
+    [foo] => orange
+    [bar] => apple
+    [baz] => lemon
+)

tests/lang/array_shortcut_003.phpt

@@ -0,0 +1,13 @@
+--TEST--
+Testing array shortcut and bracket operator
+--FILE--
+<?php
+$a = [1, 2, 3, 4, 5];
+print_r([$a[1], $a[3]]);
+?>
+--EXPECT--
+Array
+(
+    [0] => 2
+    [1] => 4
+)

tests/lang/array_shortcut_005.phpt

@@ -0,0 +1,20 @@
+--TEST--
+Testing nested array shortcut
+--FILE--
+<?php
+print_r([1, 2, 3, ["foo" => "orange", "bar" => "apple", "baz" => "lemon"]]);
+?>
+--EXPECT--
+Array
+(
+    [0] => 1
+    [1] => 2
+    [2] => 3
+    [3] => Array
+        (
+            [foo] => orange
+            [bar] => apple
+            [baz] => lemon
+        )
+
+)