Fix GH-14590: Memory leak in FPM test gh13563-conf-bool-env.phpt

Values retrieved from zend_getenv should be freed.
Note: The only possible value for `zend_getenv` is `sapi_getenv` which uses
zend alloc to duplicate the string that it reads from the SAPI module.

Closes GH-14708.

Author: nielsdos

NEWS

@@ -6,6 +6,8 @@ PHP                                                                        NEWS
   . Fixed bug GH-13922 (Fixed support for systems with
     sysconf(_SC_GETPW_R_SIZE_MAX) == -1). (Arnaud)
   . Fixed bug GH-14626 (Fix is_zend_ptr() for huge blocks). (Arnaud)
+  . Fixed bug GH-14590 (Memory leak in FPM test gh13563-conf-bool-env.phpt.
+    (nielsdos)
 
 - Phar:
   . Fixed bug GH-14603 (null string from zip entry).

Zend/zend_ini_parser.y

@@ -173,8 +173,10 @@ static void zend_ini_get_var(zval *result, zval *name)
 	if ((curval = zend_get_configuration_directive(Z_STR_P(name))) != NULL) {
 		ZVAL_NEW_STR(result, zend_string_init(Z_STRVAL_P(curval), Z_STRLEN_P(curval), ZEND_SYSTEM_INI));
 	/* ..or if not found, try ENV */
-	} else if ((envvar = zend_getenv(Z_STRVAL_P(name), Z_STRLEN_P(name))) != NULL ||
-			   (envvar = getenv(Z_STRVAL_P(name))) != NULL) {
+	} else if ((envvar = zend_getenv(Z_STRVAL_P(name), Z_STRLEN_P(name))) != NULL) {
+		ZVAL_NEW_STR(result, zend_string_init(envvar, strlen(envvar), ZEND_SYSTEM_INI));
+		efree(envvar);
+	} else if ((envvar = getenv(Z_STRVAL_P(name))) != NULL) {
 		ZVAL_NEW_STR(result, zend_string_init(envvar, strlen(envvar), ZEND_SYSTEM_INI));
 	} else {
 		zend_ini_init_string(result);