diff --git a/Zend/tests/arbitrary_string_interpolation.phpt b/Zend/tests/arbitrary_string_interpolation.phpt
new file mode 100644
index 0000000000000..813331bdc71de
--- /dev/null
+++ b/Zend/tests/arbitrary_string_interpolation.phpt
@@ -0,0 +1,26 @@
+--TEST--
+Arbitrary string interpolation with "{$:expr}"
+--FILE--
+<?php
+
+const foo = 'bar';
+
+function foo() {
+    return 'bar';
+}
+
+echo "{$:foo()}", PHP_EOL;
+echo "{$:foo}", PHP_EOL;
+echo "{$:'f' . 'o' . 'o'}", PHP_EOL;
+echo "{$:"f" . "o" . "o"}", PHP_EOL;
+echo "{$:"{$:"foo"}"}", PHP_EOL;
+echo "{$:1 + 2 + 3}", PHP_EOL;
+
+?>
+--EXPECT--
+bar
+bar
+foo
+foo
+foo
+6
diff --git a/Zend/tests/flexible-heredoc-error7.phpt b/Zend/tests/flexible-heredoc-error7.phpt
index d31b430b5670c..05a49ef70e149 100644
--- a/Zend/tests/flexible-heredoc-error7.phpt
+++ b/Zend/tests/flexible-heredoc-error7.phpt
@@ -8,4 +8,4 @@ Note: the closing ?> has been deliberately elided.
 echo <<<END
 
 --EXPECTF--
-Parse error: syntax error, unexpected end of file, expecting variable or heredoc end or "${" or "{$" in %s on line %d
+Parse error: syntax error, unexpected end of file in %s on line %d
diff --git a/Zend/tests/flexible-nowdoc-error7.phpt b/Zend/tests/flexible-nowdoc-error7.phpt
index b31b3e5d3b3b6..7f50d53de0e98 100644
--- a/Zend/tests/flexible-nowdoc-error7.phpt
+++ b/Zend/tests/flexible-nowdoc-error7.phpt
@@ -8,4 +8,4 @@ Note: the closing ?> has been deliberately elided.
 echo <<<'END'
 
 --EXPECTF--
-Parse error: syntax error, unexpected end of file, expecting variable or heredoc end or "${" or "{$" in %s on line %d
+Parse error: syntax error, unexpected end of file in %s on line %d
diff --git a/Zend/tests/flexible-nowdoc-error8.phpt b/Zend/tests/flexible-nowdoc-error8.phpt
index 5c5643206b91c..3b9641e635501 100644
--- a/Zend/tests/flexible-nowdoc-error8.phpt
+++ b/Zend/tests/flexible-nowdoc-error8.phpt
@@ -8,4 +8,4 @@ eval('<<<\'end\'
 
 ?>
 --EXPECTF--
-Parse error: syntax error, unexpected end of file, expecting variable or heredoc end or "${" or "{$" in %s on line %d
+Parse error: syntax error, unexpected end of file in %s on line %d
diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index 039e95913f6d3..0225e7a79069c 100644
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -9550,7 +9550,6 @@ static void zend_compile_encaps_list(znode *result, zend_ast *ast) /* {{{ */
 			ZVAL_EMPTY_STRING(&result->u.constant);
 			/* empty string */
 		}
-		CG(active_op_array)->last = reserved_op_number - 1;
 		return;
 	} else if (last_const_node.op_type == IS_CONST) {
 		opline = &CG(active_op_array)->opcodes[reserved_op_number];
diff --git a/Zend/zend_language_parser.y b/Zend/zend_language_parser.y
index f6ba5465abebb..c01479c5c427b 100644
--- a/Zend/zend_language_parser.y
+++ b/Zend/zend_language_parser.y
@@ -226,6 +226,7 @@ static YYSIZE_T zend_yytnamerr(char*, const char*);
 %token T_END_HEREDOC     "heredoc end"
 %token T_DOLLAR_OPEN_CURLY_BRACES "'${'"
 %token T_CURLY_OPEN      "'{$'"
+%token T_CURLY_DOLLAR_COLON "'{$:'"
 %token T_PAAMAYIM_NEKUDOTAYIM "'::'"
 %token T_NS_SEPARATOR    "'\\'"
 %token T_ELLIPSIS        "'...'"
@@ -1497,6 +1498,7 @@ encaps_var:
 			{ $$ = zend_ast_create(ZEND_AST_DIM,
 			      zend_ast_create(ZEND_AST_VAR, $2), $4); }
 	|	T_CURLY_OPEN variable '}' { $$ = $2; }
+	|	T_CURLY_DOLLAR_COLON expr '}' { $$ = $2; }
 ;
 
 encaps_var_offset:
diff --git a/Zend/zend_language_scanner.l b/Zend/zend_language_scanner.l
index a367c2acb82da..5c011910c7445 100644
--- a/Zend/zend_language_scanner.l
+++ b/Zend/zend_language_scanner.l
@@ -2761,6 +2761,13 @@ skip_escape_conversion:
 }
 
 
+<ST_DOUBLE_QUOTES,ST_BACKQUOTE,ST_HEREDOC>"{$:" {
+	yy_push_state(ST_IN_SCRIPTING);
+	enter_nesting('{');
+	RETURN_TOKEN(T_CURLY_DOLLAR_COLON);
+}
+
+
 <ST_DOUBLE_QUOTES,ST_BACKQUOTE,ST_HEREDOC>"{$" {
 	yy_push_state(ST_IN_SCRIPTING);
 	yyless(1);
diff --git a/ext/tokenizer/tests/token_get_all_heredoc_nowdoc.phpt b/ext/tokenizer/tests/token_get_all_heredoc_nowdoc.phpt
index 6b3010d7cf41b..bdbd4b3db7550 100644
--- a/ext/tokenizer/tests/token_get_all_heredoc_nowdoc.phpt
+++ b/ext/tokenizer/tests/token_get_all_heredoc_nowdoc.phpt
@@ -326,11 +326,11 @@ Line 2: T_END_HEREDOC ('  INNER_END')
 
 Test case 5
 
-Parse error: syntax error, unexpected end of file, expecting variable or heredoc end or "${" or "{$" on line 2
+Parse error: syntax error, unexpected end of file on line 2
 
 Test case 6
 
-Parse error: syntax error, unexpected end of file, expecting variable or heredoc end or "${" or "{$" on line 2
+Parse error: syntax error, unexpected end of file on line 2
 
 Test case 7
 
@@ -409,8 +409,8 @@ Line 3: T_END_HEREDOC ('   INNER_END')
 
 Test case 17
 
-Parse error: syntax error, unexpected end of file, expecting variable or heredoc end or "${" or "{$" on line 4
+Parse error: syntax error, unexpected end of file on line 4
 
 Test case 18
 
-Parse error: syntax error, unexpected end of file, expecting variable or heredoc end or "${" or "{$" on line 4
+Parse error: syntax error, unexpected end of file on line 4
diff --git a/ext/tokenizer/tokenizer_data.c b/ext/tokenizer/tokenizer_data.c
index a5adc67308485..16c9b39e70fff 100644
--- a/ext/tokenizer/tokenizer_data.c
+++ b/ext/tokenizer/tokenizer_data.c
@@ -162,6 +162,7 @@ void tokenizer_register_constants(INIT_FUNC_ARGS) {
 	REGISTER_LONG_CONSTANT("T_END_HEREDOC", T_END_HEREDOC, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("T_DOLLAR_OPEN_CURLY_BRACES", T_DOLLAR_OPEN_CURLY_BRACES, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("T_CURLY_OPEN", T_CURLY_OPEN, CONST_CS | CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("T_CURLY_DOLLAR_COLON", T_CURLY_DOLLAR_COLON, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("T_PAAMAYIM_NEKUDOTAYIM", T_PAAMAYIM_NEKUDOTAYIM, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("T_NS_SEPARATOR", T_NS_SEPARATOR, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("T_ELLIPSIS", T_ELLIPSIS, CONST_CS | CONST_PERSISTENT);
@@ -315,6 +316,7 @@ char *get_token_type_name(int token_type)
 		case T_END_HEREDOC: return "T_END_HEREDOC";
 		case T_DOLLAR_OPEN_CURLY_BRACES: return "T_DOLLAR_OPEN_CURLY_BRACES";
 		case T_CURLY_OPEN: return "T_CURLY_OPEN";
+		case T_CURLY_DOLLAR_COLON: return "T_CURLY_DOLLAR_COLON";
 		case T_PAAMAYIM_NEKUDOTAYIM: return "T_DOUBLE_COLON";
 		case T_NS_SEPARATOR: return "T_NS_SEPARATOR";
 		case T_ELLIPSIS: return "T_ELLIPSIS";