[php-src] Issue #10890: FPM: error_log entries all on same line

Issue: https://github.com/php/php-src/issues/10890 Author: verne-wv ### Description The following code: ``` <?php echo 'try err msg on line 1<p>'; error_log("err on line 1"); echo 'try err msg on line 2<p>'; error_log('err on line 2'); echo 'try err msg on line 3<p>'; error_log('err on line 3'); ?> ``` Resulted in this output: ``` [Mon Mar 20 15:07:40.253904 2023] [proxy_fcgi:error] [pid 122391:tid 140026615572224] [client 129.71.34.33:53261] AH01071: Got error 'PHP message: err on line 1PHP message: err on line 2PHP message: err on line 3' ``` But I expected something similar to this instead: ``` [Mon Mar 20 13:25:38.221700 2023] [fcgid:warn] [pid 97183:tid 140026511869696] [client 129.71.34.33:57883] mod_fcgid: stderr: err on line 1 [Mon Mar 20 13:25:38.221753 2023] [fcgid:warn] [pid 97183:tid 140026511869696] [client 129.71.34.33:57883] mod_fcgid: stderr: err on line 2 [Mon Mar 20 13:25:38.221762 2023] [fcgid:warn] [pid 97183:tid 140026511869696] [client 129.71.34.33:57883] mod_fcgid: stderr: err on line 3 ``` If I change back to FCGId I do get the above three individual log entries -- in fact my example above, as you can see, is from FCGId. Either I am missing a setting in my PHP and/or FPM config (some flush or cache setting?) or FPM is the culprit here :-) If I send three different distinct error messages, each should be standalone and not concatenated together -- again FCGId logs things properly. ### PHP Version PHP 8.2.4 ### Operating System _No response_