#32414 [Opn]: session_start(): Cannot send session cache limiter

ID: 32414 Updated by: sniper@php.net Reported By: d dot geels at grape dot ru Status: Open -Bug Type: Session related +Bug Type: Documentation problem Operating System: any PHP Version: 4.3.10, also 5 New Comment: This is actually just documentation problem: You can't send any headers from a register_shutdown_function() call. Or use any functions in such function that might send headers..such as almost any session function. Previous Comments: ------------------------------------------------------------------------ [2005-03-22 18:46:42] d dot geels at grape dot ru Tiny example, that always reproduces the bug. <? ini_set('session.use_cookies', 0); session_id('1234'); session_cache_limiter('public'); session_start(); session_write_close(); ?> text <? function a(){ session_cache_limiter('none'); session_start(); session_write_close(); } register_shutdown_function('a'); ?> If just call a() at the end -- no warnings, if a() called at shutdown -- warning issued. ------------------------------------------------------------------------ [2005-03-22 18:43:53] d dot geels at grape dot ru No, we don't use this at all, this option is always set to 0. Just checked, ini option is set to 0, .htaccess doesn't change this option. ------------------------------------------------------------------------ [2005-03-22 18:34:23] sniper@php.net Do you have 'session.auto_start' set on somewhere? (httpd.conf, .htaccess file, php.ini..) ------------------------------------------------------------------------ [2005-03-22 18:25:12] d dot geels at grape dot ru There is one more detail, I forgot to mention: I couldn't kill warning message by calling @start_session() in line 45. Is this because of warning message issued somewhere in calls from session_start()? ------------------------------------------------------------------------ [2005-03-22 18:16:04] d dot geels at grape dot ru Just viewd latest session.c from CVS repository. There are not much changes between versions 4 and 5, so bug still remains in PHP 5. Somewhere here: static int php_session_cache_limiter(TSRMLS_D) { php_session_cache_limiter_t *lim; // for some reason, this string fails if (PS(cache_limiter)[0] == '\0') return 0; // I cant understand all this file, but I think, problem is // that value 'none' is not properly recognized or processed if (SG(headers_sent)) { char *output_start_filename = php_get_output_start_filename(TSRMLS_C); int output_start_lineno = php_get_output_start_lineno(TSRMLS_C); if (output_start_filename) { php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cannot send session cache limiter - headers already sent (output started at %s:%d)", output_start_filename, output_start_lineno); } else { php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cannot send session cache limiter - headers already sent"); } return -2; } for (lim = php_session_cache_limiters; lim->name; lim++) { if (!strcasecmp(lim->name, PS(cache_limiter))) { lim->func(TSRMLS_C); return 0; } } return -1; } ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/32414 -- Edit this bug report at http://bugs.php.net/?id=32414&edit=1