It can return float as well

Author: kamil-tekiela

ext/mysqli/mysqli.stub.php

@@ -429,7 +429,7 @@ public function fetch_row() {}
     /**
      * @alias mysqli_fetch_column
      */
-    public function fetch_column(int $column = 0): null|int|string|false {}
+    public function fetch_column(int $column = 0): null|int|float|string|false {}
 
     /**
      * @return bool
@@ -670,7 +670,7 @@ function mysqli_fetch_object(mysqli_result $result, string $class = "stdClass",
 
 function mysqli_fetch_row(mysqli_result $result): array|null|false {}
 
-function mysqli_fetch_column(mysqli_result $result, int $column = 0): null|int|string|false {}
+function mysqli_fetch_column(mysqli_result $result, int $column = 0): null|int|float|string|false {}
 
 function mysqli_field_count(mysqli $mysql): int {}
 

ext/mysqli/mysqli_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 744c59d0ae28d46f99e478c903cdf9741f97d134 */
+ * Stub hash: 8a095c856517b625ec524a6c26a18492bba067f9 */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_mysqli_affected_rows, 0, 1, MAY_BE_LONG|MAY_BE_STRING)
 	ZEND_ARG_OBJ_INFO(0, mysql, mysqli, 0)
@@ -115,7 +115,7 @@ ZEND_END_ARG_INFO()
 
 #define arginfo_mysqli_fetch_row arginfo_mysqli_fetch_assoc
 
-ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_mysqli_fetch_column, 0, 1, MAY_BE_NULL|MAY_BE_LONG|MAY_BE_STRING|MAY_BE_FALSE)
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_mysqli_fetch_column, 0, 1, MAY_BE_NULL|MAY_BE_LONG|MAY_BE_DOUBLE|MAY_BE_STRING|MAY_BE_FALSE)
 	ZEND_ARG_OBJ_INFO(0, result, mysqli_result, 0)
 	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, column, IS_LONG, 0, "0")
 ZEND_END_ARG_INFO()
@@ -614,7 +614,7 @@ ZEND_END_ARG_INFO()
 
 #define arginfo_class_mysqli_result_fetch_row arginfo_class_mysqli_character_set_name
 
-ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_class_mysqli_result_fetch_column, 0, 0, MAY_BE_NULL|MAY_BE_LONG|MAY_BE_STRING|MAY_BE_FALSE)
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_class_mysqli_result_fetch_column, 0, 0, MAY_BE_NULL|MAY_BE_LONG|MAY_BE_DOUBLE|MAY_BE_STRING|MAY_BE_FALSE)
 	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, column, IS_LONG, 0, "0")
 ZEND_END_ARG_INFO()
 

ext/mysqli/tests/mysqli_fetch_column.phpt

@@ -64,16 +64,28 @@ $res = mysqli_query($link, "SELECT
 print "[007]\n";
 var_dump(mysqli_fetch_column($res, 4));
 
-$res = mysqli_query($link, "SELECT id, label FROM test ORDER BY id LIMIT 1");
+$res = mysqli_query($link, "SELECT
+    1.42 AS a
+");
 print "[008]\n";
+var_dump(mysqli_fetch_column($res, 0));
+
+$res = mysqli_query($link, "SELECT
+    1.42E0 AS a
+");
+print "[009]\n";
+var_dump(mysqli_fetch_column($res, 0));
+
+$res = mysqli_query($link, "SELECT id, label FROM test ORDER BY id LIMIT 1");
+print "[010]\n";
 try {
     var_dump(mysqli_fetch_column($res, -1));
 } catch (\ValueError $e) {
     echo $e->getMessage(), \PHP_EOL;
 }
 
 $res = mysqli_query($link, "SELECT id, label FROM test ORDER BY id LIMIT 1");
-print "[009]\n";
+print "[011]\n";
 try {
     var_dump(mysqli_fetch_column($res, 2));
 } catch (\ValueError $e) {
@@ -89,15 +101,13 @@ try {
 
 $res = $link->query("SELECT id, label FROM test ORDER BY id LIMIT 2");
 
-print "[010]\n";
+print "[012]\n";
 var_dump($res->fetch_column());
 
-print "[011]\n";
+print "[013]\n";
 var_dump($res->fetch_column(1));
 
 mysqli_close($link);
-
-print "done!";
 ?>
 --CLEAN--
 <?php
@@ -119,12 +129,15 @@ NULL
 [007]
 int(1)
 [008]
-mysqli_fetch_column(): Argument #2 ($column) must be greater than or equal to 0
+string(4) "1.42"
 [009]
+float(1.42)
+[010]
+mysqli_fetch_column(): Argument #2 ($column) must be greater than or equal to 0
+[011]
 mysqli_fetch_column(): Argument #2 ($column) must be less than the number of fields for this result set
 mysqli_result object is already closed
-[010]
+[012]
 int(1)
-[011]
+[013]
 string(1) "b"
-done!