Make parameter $column_key optional in array_column()

Author: vudaltsov

ext/standard/array.c

@@ -4666,10 +4666,10 @@ PHP_FUNCTION(array_column)
 	zend_long index_long = 0;
 	bool index_is_null = 1;
 
-	ZEND_PARSE_PARAMETERS_START(2, 3)
+	ZEND_PARSE_PARAMETERS_START(1, 3)
 		Z_PARAM_ARRAY_HT(input)
-		Z_PARAM_STR_OR_LONG_OR_NULL(column_str, column_long, column_is_null)
 		Z_PARAM_OPTIONAL
+		Z_PARAM_STR_OR_LONG_OR_NULL(column_str, column_long, column_is_null)
 		Z_PARAM_STR_OR_LONG_OR_NULL(index_str, index_long, index_is_null)
 	ZEND_PARSE_PARAMETERS_END();
 

ext/standard/basic_functions.stub.php

@@ -1737,7 +1737,7 @@ function array_count_values(array $array): array {}
  * @compile-time-eval
  * @refcount 1
  */
-function array_column(array $array, int|string|null $column_key, int|string|null $index_key = null): array {}
+function array_column(array $array, int|string|null $column_key = null, int|string|null $index_key = null): array {}
 
 /**
  * @compile-time-eval

ext/standard/basic_functions_arginfo.h

@@ -0,0 +1,22 @@
+--TEST--
+parameter $column_key of array_column() is optional
+--FILE--
+<?php
+
+$array = [['a'], ['b']];
+var_dump(array_column($array, index_key: 0));
+
+?>
+--EXPECT--
+array(2) {
+  ["a"]=>
+  array(1) {
+    [0]=>
+    string(1) "a"
+  }
+  ["b"]=>
+  array(1) {
+    [0]=>
+    string(1) "b"
+  }
+}